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12th CBSE
IMPORTANT
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What is a Wheatstone bridge ?

Important Questions on Current Electricity

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 53
Write the principle of working of a metre bridge.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 54

The given graph shows the variation of resistance of mercury in the temperature range 0<T<4 K Name the phenomenon shown by the graph.

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EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 55
If the resistances in the three successive arms of a balanced Wheatstone bridge are 1,2 and 36Ω respectively, what will be the resistance of the galvanometer placed in the fourth arm ?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 56
Current I flows through a potential drop V across a conductor. What is the rate of production of heat?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 57
The rate of production of heat is given by P=VI. Is this relation valid for a non-ohmic conductor ?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 58
How is electric energy related to electric power?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 59
Of which physical quantity is the unit kilowatt hour?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 60
What do you mean by 1 unit of electric energy in domestic use ?