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12th Bihar Board
IMPORTANT
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The Drift velocity vd and applied electric field E of a conductor are related as:

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Important Questions on Current Electricity

MEDIUM
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Current Electricity>Bihar Board-2018>Q 3
Four resistances 12 Ω are connected in parallel. Three such combinations are connected in series. What will be the total resistance?
HARD
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Current Electricity>Bihar Board-2018>Q 4
Using theory of drift velocity, express Ohm's law.
EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Current Electricity>Bihar Board-2019>Q 5
With the increase of temperature the resistivity of semiconductor-
EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Current Electricity>Bihar Board-2019>Q 6
When two bulbs of power 60 W and 40 W are connected in series, then the power of their combination will be-
EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Current Electricity>Bihar Board-2019>Q 7
Power of an electric-circuit is
EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Current Electricity>Bihar Board-2019>Q 8
At constant potential difference, the resistance of any electric circuit is halved, the value of heat produced will be-
EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Current Electricity>Bihar Board-2019>Q 9
Two resistors of resistance ratio 3 : 4 are connected in parallel. Compare the magnitude of heat produced in them.
HARD
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Current Electricity>Bihar Board-2019>Q 10
State and explain Kirchoff's laws. Applying this law, obtained the balanced condition of wheatstone bridge.