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.
The electromotive force (emf) of a cell is defined as:
A.
The energy stored per unit charge in the external circuit
B.
The force on a unit charge inside the cell
C.
The work done per unit charge by the source in moving charge from low to high potential
D.
The potential difference across the terminals when current flows
😑 View Answer Rough Work Error
ANSWER :
C. The work done per unit charge by the source in moving charge from low to high potential
2.
The terminal potential difference of a cell of EMF ε and internal resistance r when supplying a current I is:
A.
V = ε / Ir
B.
V = ε + Ir
C.
V = ε − Ir
D.
V = ε × Ir
😑 View Answer Rough Work Error
ANSWER :
C. V = ε − Ir
3.
The terminal potential difference of a cell when no current is drawn from it equals:
A.
Internal resistance
B.
EMF of the cell
C.
Half of EMF
D.
Zero
😑 View Answer Rough Work Error
ANSWER :
B. EMF of the cell
4.
A cell of EMF 12 V and internal resistance 0.5 Ω is connected to a 5.5 Ω external resistor. The terminal voltage of the cell is:
A.
10 V
B.
1 V
C.
11 V
D.
12 V
😑 View Answer Rough Work Error
ANSWER :
C. 11 V
5.
Internal resistance of a cell is due to:
A.
Conducting wires
B.
External resistor
C.
Air gap
D.
Resistance of electrolyte and electrodes
😑 View Answer Rough Work Error
ANSWER :
D. Resistance of electrolyte and electrodes
6.
The maximum current that can be drawn from a cell of EMF ε and internal resistance r is:
A.
ε/r
B.
r/ε
C.
ε²/r
D.
ε·r
😑 View Answer Rough Work Error
ANSWER :
A. ε/r