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


13.
n identical cells each of EMF ε and internal resistance r are connected in series. The equivalent EMF and internal resistance are:
A.
nε and r/n
B.
ε/n and r/n
C.
ε/n and nr
D.
nε and nr
😑 View Answer Rough Work Error
ANSWER :
D. nε and nr
14.
n identical cells each of EMF ε and internal resistance r are connected in parallel. The equivalent EMF and internal resistance are:
A.
ε/n and nr
B.
ε and r/n
C.
nε and nr
D.
nε and r/n
😑 View Answer Rough Work Error
ANSWER :
B. ε and r/n
15.
If a current I flows from positive to negative terminal of a cell through the external circuit, then in the cell the current flows:
A.
No current flows in the cell
B.
From positive to negative terminal
C.
From negative to positive terminal
D.
Both directions
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ANSWER :
C. From negative to positive terminal
16.
The relation V = ε − Ir gives the terminal voltage when:
A.
The cell is delivering current to a load
B.
The cell has zero EMF
C.
The cell is in open circuit
D.
The cell is being charged
😑 View Answer Rough Work Error
ANSWER :
A. The cell is delivering current to a load
17.
A storage battery has an EMF of 12 V and an internal resistance of 0.4 Ω. The maximum current that can be drawn is:
A.
30 A
B.
12 A
C.
0.4 A
D.
48 A
😑 View Answer Rough Work Error
ANSWER :
A. 30 A
18.
A cell of EMF 2 V and internal resistance 0.5 Ω is connected to an external resistor of 1.5 Ω. The current in the circuit is:
A.
1 A
B.
2 A
C.
4 A
D.
0.5 A
😑 View Answer Rough Work Error
ANSWER :
A. 1 A