Internal Resistance, Potential Difference and EMF of a Cell, a Combination of Cells in Series and Parallel NEET Questions

Physics - Current Electricity

Internal Resistance, Potential Difference and EMF of a Cell, a Combination of Cells in Series and Parallel MCQ Questions


1.
What is the unit of electromotive force (EMF)?
A.
Volt
B.
Ohm
C.
Ampere
D.
Coulomb
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ANSWER :
A. Volt
2.
Which factor affects the internal resistance of a cell?
A.
Temperature
B.
Size of electrodes
C.
Type of electrolyte
D.
All of the above
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ANSWER :
D. All of the above
3.
What happens to the terminal voltage of a cell when the current increases?
A.
It increases
B.
It decreases
C.
Remains constant
D.
Depends on resistance
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ANSWER :
B. It decreases
4.
Three identical cells each of emf 1.5V and internal resistance 1Ω are connected in parallel. The effective emf of the combination is:

NEET - 2018

A.
4.5V
B.
1.5V
C.
0.5V
D.
3V
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ANSWER :
B. 1.5V
5.
If a cell of emf 2V and internal resistance 0.5Ω is connected to an external resistance of 3.5Ω, the current in the circuit is:

NEET - 2019

A.
0.5A
B.
1A
C.
2A
D.
4A
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ANSWER :
A. 0.5A
6.
The internal resistance of a cell is due to:
A.
Electrolyte resistance
B.
Electrode reaction
C.
Electrode resistance
D.
All of the above
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ANSWER :
D. All of the above