ATIVIDADE AVALIATIVA - TERCEIRO ANO
Autor: josejanuario.bolgspot.com | Publicado: 2017-06-22T13:24:00-07:00


 

  


ESCOLA ESTADUAL GRAMONT ALVES GONTIJO

 

  
ATIVIDADE
  AVALIATIVA DE FÍSICA – TERCEIRO ANO

 

  
NOME:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  PROFESSOR: JANUÁRIO

 

  
TURMA:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DATA:____/_____/2017

 




1111) &nbsp;<!--[endif]-->&nbsp;(Mackenzie- SP) &nbsp;Uma partícula P,&nbsp; é abandonada a&nbsp; 3&nbsp; m de distância de uma carga&nbsp; Q,
carregada&nbsp; com&nbsp; 2&nbsp; uC.&nbsp;
Desprezando as ações gravitacionais e adotando&nbsp; K&nbsp; =&nbsp; 9.109&nbsp;N.m²/C²,
o potencial elétrico&nbsp;&nbsp; de&nbsp; Q,
será:



&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 2)&nbsp; &nbsp;(FMTM-2016) &nbsp;&nbsp;O planeta Terra é um grande condutor
esférico eletrizado&nbsp; com carga&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; avaliada
em 5,8×105 C. Seu raio é
de aproximadamente 6,4×103 &nbsp;m. Se o &nbsp;&nbsp;&nbsp;&nbsp;considerarmos&nbsp; isolado do universo, seu potencial&nbsp; elétrico será, em relação a um referencial no
infinito, &nbsp;aproximadamente igual a: Dado:
&nbsp;&nbsp;k
= 9.109 N.m2 /C2



&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;3)&nbsp;&nbsp;
Qual é o potencial elétrico situado em um
ponto A, &nbsp;a&nbsp;&nbsp; 40 m de uma carga elétrica&nbsp;(Q),
&nbsp;de 6 &nbsp;microcoulombs?&nbsp;




&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 4)&nbsp;&nbsp;
Qual é o potencial em um ponto C,&nbsp;
situado a 40 cm de uma carga elétrica de valor igual&nbsp; 4.10-8&nbsp; C?&nbsp;

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;5)&nbsp;&nbsp;&nbsp;&nbsp; (PUC – RS) Uma carga de&nbsp;2,0
. 10-7&nbsp; C&nbsp; &nbsp;encontra-se isolada, no vácuo,
distante 6,0&nbsp; cm de um &nbsp;ponto&nbsp; P.&nbsp;&nbsp; Dado:&nbsp;&nbsp; K0&nbsp;=&nbsp;&nbsp; 9,0&nbsp;&nbsp;
.&nbsp;&nbsp;&nbsp; 109&nbsp;&nbsp; unidades&nbsp;&nbsp; SI.&nbsp;&nbsp;&nbsp;
&nbsp;Qual a
proposição correta?

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;a)&nbsp;&nbsp; O&nbsp;
vetor campo elétrico no ponto P está voltado para a carga.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;b)&nbsp;&nbsp; O&nbsp;
campo elétrico no ponto P é nulo porque não há nenhuma carga elétrica em
P.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;c)&nbsp;&nbsp; O&nbsp;
potencial elétrico no ponto P é positivo e vale 3,0&nbsp;.&nbsp;104.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;d)&nbsp;&nbsp; O&nbsp;
potencial elétrico no ponto P é negativo e vale -5,0&nbsp;.&nbsp;104
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;e)&nbsp;&nbsp; Em
P são nulos o campo elétrico e o potencial, pois aí não existe carga elétrica.

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;6) &nbsp;&nbsp;Uma carga de 2 C, está
situada num ponto P, e nela atua uma força de 4N. Qual será a intensidade Do
campo elétrico&nbsp; quando ela for colocada
no ponto P?
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;7)&nbsp;&nbsp; (MACKENZIE) Sobre uma carga elétrica de 2,0
. 10-6C, colocada em certo ponto do espaço, age um campo
elétrico&nbsp; de intensidade 0,80 N/C .
Despreze as ações gravitacionais. A intensidade da força,&nbsp; nesse ponto, &nbsp;é:
a) 1,6 .
10-6&nbsp; N&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) 1,3 . 10-5&nbsp;N&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c) 2,0 . 103&nbsp;N&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d) 1,6 . 105&nbsp;N&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e) 4,0 . 105&nbsp;N





&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
DIVIRTAM-SE!!!

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;GÊ!!!





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