NEET Physics Kirchhoffs Laws and Cells MCQs Set A

Question: Emf of a cell is
(a) the maximum potential difference between the terminals of a cell when no current is drawn from the cell
(b) the force required to push the electrons in the circuit
(c) the potential difference between the positive and negative terminal of a cell in a closed circuit.
(d) less than terminal potential difference of the cell

Answer: A

Question: An energy source will supply a constant current into the load if its internal resistance is
(a) zero
(b) non-zero but less than the resistance of the load
(c) equal to the resistance of the load
(d) very large as compared to the load resistance

Answer: A

Question: To draw a maximum current from a combination of cells, how should the cells be grouped?
(a) Depends upon the relative values of internal and external resistances
(b) Mixed grouping
(c) Series
(d) Parallel

Answer: A

Question: A cell of internal resistance r is connected to an external resistance R. The current will be maximum in R, if
(a) R = r
(b) R < r
(c) R > r
(d) R = r/2

Answer: A

Question: A capacitor is connected to a cell of emf E having some internal resistance r. The potential difference across the
(a) cell is E
(b) cell is < E
(c) capacitor is > E
(d) capacitor is < E

Answer: A

Question:  Assertion : Kirchoff’s juction rule can be applied to a junction of several lines or a point in a line.
Reason : When steady current is flowing, there is no accumulation of charges at any junction or at any point in a line.
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is incorrect, reason is correct.
(d) Assertion is correct, reason is incorrect

Answer: A

Question. Emf of a cell is
(a) the maximum potential difference between the terminals of a cell when no current is drawn from the cell
(b) the force required to push the electrons in the circuit
(c) the potential difference between the positive and negative terminal of a cell in a closed circuit.
(d) less than terminal potential difference of the cell

Answer: A

Question. An energy source will supply a constant current into the load if its internal resistance is
(a) zero
(b) non-zero but less than the resistance of the load
(c) equal to the resistance of the load
(d) very large as compared to the load resistance

Answer: A

Question. To draw a maximum current from a combination of cells, how should the cells be grouped?
(a) Depends upon the relative values of internal and external resistances
(b) Mixed grouping
(c) Series
(d) Parallel

Answer: A

Question. A cell of internal resistance r is connected to an external resistance R. The current will be maximum in R, if
(a) R = r
(b) R < r
(c) R > r
(d) R = r/2

Answer: A

Question. A capacitor is connected to a cell of emf E having some internal resistance r. The potential difference across the
(a) cell is E
(b) cell is < E
(c) capacitor is > E
(d) capacitor is < E

Answer: A

Question. Under what condition will the strength of current in a wire of resistance R be the same for connection is series and in parallel of n identical cells each of the internal resistance r? When
(a) R = r
(b) R = n r
(c) None of these
(d) R = r/n

Answer: A

Question. Assertion : Kirchoff’s juction rule can be applied to a junction of several lines or a point in a line.
Reason : When steady current is flowing, there is no accumulation of charges at any junction or at any point in a line.
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is incorrect, reason is correct.
(d) Assertion is correct, reason is incorrect

Answer: A

Question. A primary cell has an e.m.f. of 1.5 volt. When short-circuited it gives a current of 3 ampere. The internal resistance of the cell is
(a) 0.5 ohm
(b) (1/4.5) ohm
(c) 2 ohm
(d) 4.5 ohm

Answer: A

Question. Assertion : Two non-ideal batteries are connected in parallel. The equivalent emf is smaller than either of the two emfs.
Reason : The equivalent internal resistance is smaller than either of the two internal resistances.
(a) Assertion is incorrect, reason is correct
(b) Assertion is correct, reason is incorrect
(c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: A