EASY
12th ICSE
IMPORTANT
Earn 100

Is the direction of emf in a cell dependent on the direction of current within 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 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?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 10
When a high-power heater is connected to electric mains, the bulbs of lightning in the house become dim, why?