EASY
12th ICSE
IMPORTANT
Earn 100

Does emf of a cell represent a force or potential energy or work done per unit charge? When will it be equal to the PD across the terminals of the cell?

Important Questions on DC Circuits and Measurements

EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 2
Is the direction of emf in a cell dependent on the direction of current within the cell?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 3
What is internal resistance of a cell? On what factors does it depend?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 4
It is easier to start a car engine on a warm day than on a cold day. Why?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 5
When the external resistance R connected in series with a cell is exactly halved, the current is not exactly doubled. Why?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 6
On increasing the current drawn from a cell, the PD across the cell terminals is further lowered. Why?
MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 7
Can a cell (emf E, internal resistance r) have zero terminal PD? Under what condition?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 8
The car-battery is of 12 volt. 8 simple cells connected in series can give 12 volt. But such cells are not used in starting a car, why?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 9
When a motor car is started then its head-light becomes slightly dim, why?