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12th CBSE
IMPORTANT
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If potential difference V applied across a conductor is increased to 2V, how will the drift velocity of the electrons change ?

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 40
What is a non-ohmic device ? State one example.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 41
What is a linear resistor?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 42
Give an example of non-ohmic device which shows up negative resistance.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 43
A cell of emf 'ξ' and internal resistance 'r' draws a current 'I'. Write the relation between terminal voltage 'V' in terms of ξ, I and r.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 44
Two identical cells, each of emf ξ, having negligible internal resistance r, are connected in parallel with each other across an external resistance R, What is the current through this resistance?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 45
A 4Ω non-insulated resistance wire is bent 180° in the middle and the two halves are twisted together. What will be its new resistance ?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 46
Can Kirchhoff's laws be applied to both d.c. and a.c. circuits ?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 47
On what conservation principle is the Kirchoff's first law based ?