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In the presence of an applied electric field (E)→ in a metallic conductor,

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Important Questions on Current Electricity

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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 12
A current of 4.8 A is flowing in a conductor. The number of electrons passing through any cross-section per second is
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 13
Specific resistance of a wire depends on its
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 14
There are two wires of the same length and of the same material and radii r ạnd 2r. The ratio of their specific resistance is 
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 15
If the length and cross-section of a wire is doubled, then the resistance will
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 16
V-i graph for an ohmic resistance is
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 17
When a resistance wire is passed through a die the cross-section area decreases by 1%, the change in resistance of the wire is
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 18
When the resistance of copper wire is 0.1 Ω and the radius is 1 mm, then the length of the wire is (specific resistance of copper is 3.14×10-8 ohm m),
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 19
Three copper wires have lengths and cross-sectional areas as (l, A), (2l, A2) and (l2, 2A). Resistance is minimum in