NEET Physics Kirchhoffs Laws and Cells MCQs Set A

a) charge
b) momentum
c) energy
d) angular momentum
Answer: charge

Question:

a) conservation of energy
b) conservation of potential
c) conservation of charge
d) conservation of momentum
Answer: conservation of energy

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: the maximum potential difference between the terminals of a cell when no current is drawn from the cell

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: zero

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: Depends upon the relative values of internal and external resistances

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:  R = r

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: cell is E

Question:  A cell of internal resistance r is connected across an external resistance nr. Then the ratio of the terminal voltage to the emf of the cell is
a)

b)

c)

d)

Answer:

 More Questions..........................................................

Question:

a)

b)

c)

d)

Answer:

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: R = r

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:  Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Question:

a)

b)

c)

d)

Answer:

Question:   Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R₁ and R₂ (R₂ > R₁). If the potential difference across the source having internal resistance R₂ is zero, then

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

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: 0.5 ohm

Question:

a) 0.9 A
b) 0.6 A
c) 1.5 A
d) 1 A
Answer:  0.9 A

Question:  In the circuit shown in figure, with steady current, the potential drop across the capacitor must be

a)

b)

c)

d) V

Answer:

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: Assertion is incorrect, reason is correct

Question: A 3 volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I, in the circuit will be

a) 1.5 A
b) 2 A
c) 1/3 A
d) 1 A
Answer:  1.5 A

Question:  Which of the following is the correct equation when kirchhoff’s loop rule is applied to the loop BCDEB in clockwise direction?

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a) zero
b) 1V
c) 2V
d) (2/3) V
Answer: zero

Question: The figure below shows currents in a part of electric circuit. The current i is

a) 1.7 amp
b) 3.7 amp
c) 1.3 amp
d) 1 amp
Answer: 1.7 amp

Question:  The four wires from a larger circuit intersect at junction A as shown. What is the magnitude and direction of the current between points A and B ?

a) 3A from A to B
b) 2A from B to A
c) 2A from B to A
d) 2 A from A to B
Answer:  3A from A to B