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In electrolysis the mass deposited on an electrode is directly proportional to :

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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 173
An ammeter and a voltmeter are joined in series to a cell. Their readings are A and V respectively. If a resistance is now joined in parallel with the voltmeter:
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 174

In the given circuit, no current is passing through the galvanometer. If the cross-sectional diameter of the wire AB is doubled, then for null point of galvanometer, the value of AC would be:

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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 175
A galvanometer can be changed into ammeter by connecting:
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 177
If an ammeter is to be used in place of a voltmeter, then we must connect with the ammeter.
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 178
An ammeter reads upto 1 ampere. Its internal resistance is 0.81ohm. To increase the range to 10A the value of the required shunt is
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 180
In a meter bridge experiment, the null point is obtained at 20 cm from one end of the wire when resistance X is balanced against another resistance Y. If X<Y, then where will be the new position of the null point from the same end, if one decides to balance a resistance of 4X against Y?
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 182
A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10 divisions per milliampere and voltage sensitivity is 2 divisions per millivolt. In order that each division reads 1 volt, the resistance in ohms needed to be connected in series with the coil will be :-
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Alpha Question Bank for Medical: Physics>Chapter 24 - Current Electricity>Exercise-1>Q 183

Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer.

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The value of the unknown resistor R is: