Unless this  certificate is presented by an authorized  representative
of The Depository  Trust Company,  a New York  corporation  ("DTC"),  to Alliant
Energy Resources,  Inc., or its agent for registration of transfer,  exchange or
payment,  and any certificate  issued is registered in the name of Cede & Co. or
to such  other  entity or in such other name as is  requested  by an  authorized
representative  of DTC (and any payment  hereon is made to Cede & Co. or to such
other  entity as is  requested  by an  authorized  representative  of DTC),  ANY
TRANSFER,  PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON
IS WRONGFUL  since the  registered  owner  hereof,  Cede & Co.,  has an interest
herein.

          Transfers  of this Global  Security  shall be limited to  transfers in
whole,  but not in part, to nominees of Cede & Co. or to a successor  thereof or
such successor's nominee.




                         ALLIANT ENERGY RESOURCES, INC.
                          7 3/8% SENIOR NOTES DUE 2009

                                   GLOBAL NOTE

CUSIP No. 18803AC0
$-------------

          Alliant  Energy  Resources,  Inc., a  corporation  duly  organized and
existing  under the laws of the State of Wisconsin  (the  "Company,"  which term
includes any successor person under the Indenture  hereinafter referred to), for
value received,  hereby promises to pay to Cede & Co. or registered assigns, the
principal sum of _____________ DOLLARS ($ _____________) on November 9, 2009, at
the office or agency of the Company  referred to below, in such coin or currency
of the United  States of  America as at the time of payment is legal  tender for
the payment of public and private  debts,  and to pay  interest  thereon in like
coin or currency from November 9, 1999, or from the most recent interest payment
date on which  interest has been paid or duly  provided  for,  semi-annually  in
arrears on May 9 and  November 9 in each year,  commencing  May 9, 2000,  at the
rate of 7 3/8% per annum,  until the principal  hereof is paid or made available
for  payment,  and (to the extent  lawful) to pay  interest at the same rate per
annum on any overdue  principal  and premium and on any overdue  installment  of
interest until paid.

<PAGE>

          Interest so payable,  and punctually paid or duly provided for, on any
Interest payment date, as provided in the Indenture, shall be paid to the person
in whose name this  Senior  Note (or one or more  predecessor  Senior  Notes) is
registered at the close of business on the record date for such interest,  which
shall be May 1 or  November 1 (whether or not a business  day),  as the case may
be,  next  preceding  such  Interest  payment  date.  Any such  interest  not so
punctually  paid or duly provided for will forthwith  cease to be payable to the
person in whose name this Senior Note is  registered on such record date and may
either be paid to the person in whose name this Senior Note is registered at the
close of business on a record date for the payment of such defaulted interest to
be fixed by the Trustee,  notice  whereof  shall be given to the person in whose
name this Senior Note is registered  not less than ten days prior to such record
date,  or be paid at any time in any  other  lawful  manner,  all as more  fully
provided in the Indenture.

          This Senior Note is a "book-entry" security and is being registered in
the name of Cede & Co. as nominee of The  Depository  Trust Company  ("DTC"),  a
clearing agency. Subject to the terms of the Indenture,  dated as of November 4,
1999 (as supplemented by the First  Supplemental  Indenture dated as of November
4, 1999 and as  supplemented  and amended from time to time,  the  "Indenture"),
among the Company,  Alliant Energy  Corporation (the  "Guarantor"),  and Firstar
Bank, N.A., as trustee (the  "Trustee"),  and except as provided  therein,  this
Senior Note will be held by a clearing  agency or its  nominee,  and  beneficial
interests will be held by beneficial owners through the book-entry facilities of
such  clearing  agency or its  nominee  in minimum  denominations  of $1,000 and
increments of $1,000 in excess thereof.

          The Trustee will make payments of principal of and interest on (except
as otherwise  provided  below) this Senior Note by wire transfer of  immediately
available  funds.  Notwithstanding  the above,  the final payment on this Senior
Note  will be made  after due  notice by the  Trustee  of the  pendency  of such
payment  and only upon  presentation  and  surrender  of this Senior Note at its
principal  corporate trust office or such other offices or agencies appointed by
the Trustee for that purpose and such other locations provided in the Indenture.

          Payments of  principal of (and  premium,  if any) and interest on this
Senior  Note  will  be made at the  offices  or  agency  of the  Company  or the
Guarantor,  as the  case  may be,  maintained  for that  purpose  in  Milwaukee,
Wisconsin and the Borough of Manhattan,  The City of New York,  New York in such
coin or  currency  of the United  States of America as at the time of payment is
legal tender for payments of public and private debts;  provided,  however, that
at the option of the Company or the  Guarantor,  as the case may be,  payment of
interest  may be made by check  mailed to the  address  of the  person  entitled
thereto as such address shall appear in the register of the Company.

<PAGE>

          This Senior Note is one of a duly  authorized  issue of  Securities of
the Company,  designated 7 3/8% Senior Notes due 2009 (the "7 3/8% Senior Notes"
or the  "Senior  Notes"),  limited  in  aggregate  principal  amount at any time
outstanding to _____________ DOLLARS ($ _____________) which may be issued under
the First Supplemental Indenture. Reference is hereby made to the Indenture, the
First  Supplemental  Indenture  and all  indentures  supplemental  thereto for a
statement of the respective rights,  limitations of rights, duties,  obligations
and immunities  thereunder of the Company,  the  Guarantor,  the Trustee and the
Holders of the Senior Notes,  and the terms upon which the Senior Notes are, and
are to be, authenticated and delivered.  All terms used in this Senior Note that
are defined in the  Indenture  shall have the  meanings  assigned to them in the
Indenture.

          The  Senior  Notes  do  not  have  the  benefit  of any  sinking  fund
obligations  and shall not be  repayable  at the option of the  Holder  prior to
maturity.

          The Senior Notes may be redeemed at the Company's  option, in whole or
in part,  at any time on at least 30 days',  but not more  than 60 days',  prior
written notice mailed to the registered  holders of the Senior Notes, at a price
equal to the  greater of (a) 100% of the  principal  amount of the Senior  Notes
being redeemed and (b) the sum of the present values of the principal  amount of
the Senior Notes to be redeemed and the remaining scheduled payments of interest
on the Senior Notes from the redemption date to November 9, 2009 discounted from
their respective  scheduled  payment dates to the redemption date  semi-annually
(assuming a 360-day year  consisting of twelve 30-day months) at a discount rate
equal to the equivalent yield to maturity of a comparable treasury security plus
20 basis  points,  plus accrued  interest on the Senior Notes to the  redemption
date.

          If an Event of Default shall occur and be continuing, the principal of
all the Senior  Notes may be declared due and payable in the manner and with the
effect provided in the Indenture.

          The Indenture  contains  provisions  for defeasance at any time of (a)
the entire  indebtedness  of the Company (and the  Guarantor)  under this Senior
Note and (b) certain  restrictive  covenants and the related defaults and Events
of Default  applicable  to the Company  and the  Guarantor,  in each case,  upon
compliance by the Company and the Guarantor with certain conditions set forth in
the Indenture, which provisions apply to this Senior Note.

          The Indenture  permits,  with certain  exceptions as therein provided,
the amendment  thereof and the modification of the rights and obligations of the
Company

<PAGE>

and the  Guarantor  and the rights of the Holders of the Senior  Notes under the
Indenture at any time by the  Company,  the  Guarantor  and the Trustee with the
consent of the Holders of a majority in aggregate principal amount of the Senior
Notes at the time outstanding. The Indenture also contains provisions permitting
the Holders of specified percentages in aggregate principal amount of the Senior
Notes at the time outstanding,  on behalf of the Holders of all Senior Notes, to
waive compliance by the Company and the Guarantor with certain provisions of the
Indenture and certain past Defaults under the Indenture and their  consequences.
Any such consent or waiver by the Holder of this Senior Note shall be conclusive
and binding upon such Holder and upon all future Holders of this Senior Note and
of any Senior  Note  issued  upon the  registration  of  transfer  thereof or in
exchange  herefor or in lieu hereof,  whether or not notation of such consent or
waiver is made upon this Senior Note.

          No reference herein to the Indenture and provision of this Senior Note
or of the Indenture  shall alter or impair the obligation of the Company and the
Guarantor,  which is absolute and  unconditional,  to pay the  principal of (and
premium,  if any) and interest on this Senior Note at the times, place and rate,
and in the coin or currency, herein prescribed.

          As provided in the  Indenture  and subject to certain  limitations  on
transfer of this Senior Note by DTC or its nominee,  the transfer of this Senior
Note is  registrable  by the  Registrar,  upon surrender of this Senior Note for
registration  of  transfer  at  the  office  or  agency  of the  Company  or the
Guarantor,  as the case may be,  in  Milwaukee,  Wisconsin  and the  Borough  of
Manhattan,  The City of New York, New York,  duly endorsed by, or accompanied by
the written  instrument of transfer  attached hereto duly executed by the Holder
hereof or his attorney duly authorized in writing, and thereupon one or more new
Senior Notes, of authorized  denominations and for the same aggregate  principal
amount, shall be issued to the designated transferee or transferees.

          The Senior Notes are issuable  only in fully  registered  form without
coupons  in  denominations  of $1,000  and any  integral  multiple  thereof.  As
provided in the Indenture and subject to certain  limitations therein set forth,
the Senior  Notes are  exchangeable  for a like  aggregate  principal  amount of
Senior Notes of different  authorized  denomination,  as requested by the Holder
surrendering the same.

          No service charge shall be made for any such  registration of transfer
or exchange of Senior  Notes,  but the  Company  and the  Guarantor  may require
payment  of a sum  sufficient  to  cover  any tax or other  governmental  charge
payable in connection therewith.

<PAGE>

          Prior to due  presentment  of this  Senior  Note for  registration  of
transfer, the Company, the Guarantor,  the Trustee and any agent of the Company,
the Guarantor or the Trustee may treat the person in whose name this Senior Note
is registered  as the owner hereof for all purposes,  whether or not this Senior
Note be overdue, and none of the Company, the Guarantor, the Trustee or any such
agent shall be affected by notice to the contrary.

          Interest  on this  Senior  Note  shall be  computed  on the basis of a
360-day year of twelve 30-day months.

          The  Company  shall  furnish to any Holder of record of Senior  Notes,
upon written request and without charge, a copy of the Indenture.

          The  Indenture  and this  Senior  Note each shall be  governed  by and
construed in accordance  with the laws of the State of Wisconsin  without regard
to principles of conflicts of law.

          Unless the certificate of  authentication  hereon has been executed by
the Trustee by manual  signature,  this Senior Note shall not be entitled to any
benefit under the Indenture or be valid or obligatory for any purpose.


<PAGE>

          In Witness  Whereof,  Alliant Energy  Resources,  Inc. has caused this
Senior Note to be signed in its corporate name by the facsimile signature of two
of its  officers  thereonto  duly  authorized  and has caused a facsimile of its
corporate seal to be affixed hereto or imprinted or otherwise reproduced hereon.

                                         ALLIANT ENERGY RESOURCES, INC.
ATTEST:


By:_________________________             By:________________________________
     Name:                                    Name:
     Title:                                   Title:


<PAGE>

          FOR VALUE RECEIVED, the Guarantor,  hereby unconditionally  guarantees
to the Holder of the Security upon which this  Guarantee is endorsed the due and
punctual  payment of the  principal,  of  premium,  if any,  or interest on said
Security,  when and as the same  shall be become  due and  payable,  whether  at
maturity,  upon  redemption or otherwise,  according to the terms thereof and of
the Indenture referred to therein.

          The Guarantor agrees to determine,  at least one business day prior to
the date upon which a payment of principal,  of premium,  if any, or interest on
said Security is due and payable, whether the Company has available the funds to
make such  payment as the same  shall  become  due and  payable.  In case of the
failure of the Company punctually to pay any such principal, premium, if any, or
interest,  the  Guarantor  hereby  agrees to cause any such  payment  to be made
punctually  when  and as the same  shall  become  due and  payable,  whether  at
maturity, upon redemption or otherwise,  and as if such payment were made by the
Company.

          The Guarantor  hereby agrees that its  obligations  hereunder shall be
unconditional,   irrevocable   and  absolute,   irrespective  of  the  validity,
regularity or enforceability of said Security or said Indenture,  the absence of
any  action to  enforce  the same,  any  waiver or consent by the Holder of said
Security with respect to any  provisions  thereof,  the recovery of any judgment
against the Company or any action to enforce the same or any other  circumstance
which might otherwise  constitute a legal or equitable discharge or defense of a
guarantor.  The  Guarantor  hereby  waives  diligence,  presentment,  demand  of
payment,  filing of claims with a court in the event of merger or  bankruptcy of
the  Company,  any right to require a  proceeding  first  against  the  Company,
protest  or notice  with  respect to said  Security  or  indebtedness  evidenced
thereby,  and all demands  whatsoever and covenants that this Guarantee will not
be discharged  except by complete  performance of the  obligations  contained in
said Security and in this Guarantee.

          The Guarantor  shall be subrogated to all rights of the Holder of said
Security  against the Company in respect to any  amounts  paid by the  Guarantor
pursuant  to the  provisions  of this  Guarantee;  provided,  however,  that the
Guarantor shall not, without the consent of the Holders of all of the Securities
then outstanding,  be entitled to enforce or to receive any payments arising out
of or based upon such right of  subrogation  until the principal of and premium,
if any, and interest on all  Securities  shall have been paid in full or payment
thereof shall have been provided for in accordance with said Indenture.

          Notwithstanding   anything  to  the  contrary   contained  herein,  if
following any payment of principal or interest by the Company on the  Securities
to the Holders of


<PAGE>

the  Securities  it is  determined  by a final  decision of a court of competent
jurisdiction  that such  payment  shall be avoided  by a trustee  in  bankruptcy
(including any debtor-in-possession) as a preference under 11 U.S.C. Section 547
and such payment is paid by such Holder to such trustee in bankruptcy,  then and
to the extent of such repayment the obligations of the Guarantor hereunder shall
remain in full force and effect.

          This Guarantee shall not be valid or become obligatory for any purpose
with  respect  to a  Security  until a  certificate  of  authentication  on such
Security shall have been signed by the Trustee (or the authenticating agent).

          This  Guarantee  shall  be  governed  by  the  laws  of the  State  of
Wisconsin.

          IN  WITNESS  WHEREOF,  ALLIANT  ENERGY  CORPORATION  has  caused  this
Guarantee  to be signed in its  corporate  name by the  signature  of two of its
officers  thereunto  duly  authorized  and has caused its  corporate  seal to be
affixed hereto or imprinted or otherwise reproduced hereon.


                                         ALLIANT ENERGY CORPORATION,
                                         as Guarantor
ATTEST:


By:_________________________             By:________________________________
     Name:                                    Name:
     Title:                                   Title:

<PAGE>

                      TRUSTEE CERTIFICATE OF AUTHENTICATION
                      -------------------------------------


          This  is  one of  the  Senior  Notes  described  in  the  within-named
Indenture.

                                         FIRSTAR BANK, N.A.,
                                         as Trustee



                                         By:________________________________
                                              Name:
                                              Title: