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Multiple Choice Question (MCQ) of Battery page-16


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151. The condition whether a lead-acid battery on charge is fully charged or not can be ascertained from any of the following EXCEPT

A) colour of plates
B) gassing
C) specific gravity
D) none of the above.

Ans : (D)

152. The current flow through electrolyte is due to the movement of

A) electrons
B) ions
C) holes
D) protons.

Ans : (B)

153. Six cells each having emf 1.4 volt and internal resistance 1/6 ohm are connected in series by a student. It is found that two cells were wrongly connected with its terminal reversed. When the series combination is connected to an external resistance of 1.8 ohm, the current flowing through the circuit will be

A) 0.1 A
B) 0.5 A
C) 1 A
D) 2.8 A.

Ans : (C)

154. Which of the following is not a primary cell?

A) Nickel-iron
B) Silver-oxide
C) Silver zinc
D) Carbon-zinc.

Ans : (C)

155. The current flowing between electrodes inside a lead-acid battery is.

A) polarization current
B) proton current
C) ionization current
D) electron current.

Ans : (A)

156. Thirty zinc carbon dry cells are connected in series. The total voltage output will be

A) 1.5 V
B) 30 V
C) 45 V
D) 60 V.

Ans : (C)

157. A 45 V source with an internal resistance of 1.5 ohms is connected across a wire wound resistor. Maximum power will be dissipated on the resistor when its R is

A) 3
B) 1.5 W
C) 15 Ω
D) 30 Ω.

Ans : (B)

158. In a flash light three dry cells (emf 1.5 volt each) are in series with a 1.1/2 ohm lamp. If each cell has an internal resistance of 1/4 ohm, the potential difference across the lamp will be

A) 0.75 volt
B) 1.5 volts
C) 4.5 volts
D) 3 volts.

Ans : (D)

159. A experimenter connects four 0.25 ohm cells in series but one cell is wrongly connected with its terminals reversed. The external resistance is 1 ohm. If each cell has emf of 1.5 volt, the current flowing is

A) zero
B) 3/4 A
C) 4/3 A
D) 1.5 A.

Ans : (D)

160. A cell does 5 joules of work in carrying 10 coulombs of charge around a closed circuit. The emf of the cell is

A) 0.5 volt
B) 1 volt
C) 3 volts
D) 4 volts.

Ans : (A)


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