Question

solve this question.......

Answer 1

Hello !
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34 ) W = dV X Q
        W = 12 X 2 
            = 24 joules 
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35) a) Inversaly proportional to resistance 

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36) R = pl/A
      l/A = 4
   cas2:  1/4 X4 
             = 1 
resistence will be 1 Ω 
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Answer 2

#34.  Work done= Potential difference(V) × Charge(Q)
     V=12v
     Q=2C
 
Work done= 12×2 =24 Joule  ⇒ option (2)

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#35.According to Ohms law
          V=IR
          I=V/R

So,current,I is inversely proportional to Resistance. ⇒ Answer is option (1)

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#36.Resistance=ρl/A
          R= 4=ρl/A

Now given what if length=l/2 and Area=2A

R=ρl/2×2A =(1/4)×ρl/A

=(1/4)×4            [R=ρl/A = 4]

=1 ohm   ⇒option (3)
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