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Current Electricity Physics - Current Electricity

Bihar Board (BSEB) - STD 12 Science - Physics (BSEB - English Medium). 50 questions in this chapter.

Question types

Current Electricity question types

50 questions across 6 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.

50
Questions
6
Question groups
5
Question types
Sample Questions

Current Electricity questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q [1M]1 Mark
Two resistors $ R_1 $ and $ R_2 $ of $ 4~\Omega $ and $ 6~\Omega $ are connected in parallel across a battery. The ratio of power dissipated in them, $ P_1: P_2 $ will be :
  • A
    4 : 9
  • B
    3 : 2
  • C
    9 : 4
  • D
    2 : 3
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Q 2M.C.Q [1M]1 Mark
A potentiometer can measure emf of a cell because :
  • A
    the sensitivity of potentiometer is large
  • B
    no current is drawn from the cell at balance
  • C
    no current flows in the wire of potentiometer at balance
  • D
    internal resistance of cell is neglected
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Q 3M.C.Q [1M]1 Mark
Kirchoff's current law (or junction law) is a result of the conservation of which quantity ?
  • A
    Energy
  • B
    Momentum
  • C
    Charge
  • D
    Mass
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Q 4M.C.Q [1M]1 Mark
Two bulbs of $ 40~W $ and $ 60~W $ are connected to $ 220~V $ source. The ratio of their resistances will be :
  • A
    $ 4:3 $
  • B
    $ 3:4 $
  • C
    $ 2:3 $
  • D
    $ 3:2 $
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Q 5M.C.Q [1M]1 Mark
The resistance of any wire is $ 500~\Omega $. Its electrical conductivity will be :
  • A
    $ 0.002~ohm^{-1} $
  • B
    $ 0.02~ohm^{-1} $
  • C
    $ 50~ohm^{-1} $
  • D
    $ 500~ohm^{-1} $
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Q 153 Marks Question3 Marks
When two resistors are connected in sereis and parallel, then their equivalent resistances are $ 16~\Omega $ and $ 3~\Omega $ respectively. Find out the resistance of each resistor.
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Q 163 Marks Question3 Marks
What is specific conductivity ? Give its unit in S.I. system. Prove that $ \vec{j}=\sigma\vec{E} $, where $ \vec{E} = $ Intensity of electric field, $ \vec{j} = $ current density and $ \sigma = $ specific conductivity.
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