HARD
12th Bihar Board
IMPORTANT
Earn 100

Using theory of drift velocity, express Ohm's law.

Important Questions on Current Electricity

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.
EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Current Electricity>Bihar Board-2020>Q 11
Kilo-watt hour is the unit of
MEDIUM
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Current Electricity>Bihar Board-2020>Q 12
Find the expression of the comparison of emf.s of two cells by a potentiometer.