Batteries Cells Objective Questions Answers

1. The cell which is used as standard cell is:
a) Dry cell
b) Solar cell
c) Mercury-Cadmium cell
d) Zinc-Carbon cell

C

2. The emf of a primary cell depends upon the:
a) Physical dimension of the cell
b) Nature of the electrolyte
c) Nature of the electrode
d) Both (b) and (c)

D

3. When two cells are connected in parallel, it should be ensured that they have:
a) Identical internal resistance
b) Equal emfs
c) Same make
d) Same ampere-hour capacity

B

4. The law that finds application in electrolysis is:
a) Faraday's law
b) Coulomb's law
c) Ohm's law
d) Lenz's law

A

5. During the discharge of lead acid battery, the terminal voltage decreases with the decrease in:
a) Temperature
b) Discharge rate
c) State of charge
d) None of the above

B

6. Vent plug is provided in each lead acid cells to:
a) Pour water or electrolyte when needed
b) Check the electrolyte level
c) Allow escape out of gases during charging
d) All the above

D

7. The capacity of battery is expressed in:
a) Amperes
b) Ampere-hours
c) Watts
d) Watt-hour

B

8. The capacity of lead acid battery is adversely by increase in:
a) Discharge rate
b) Charge rate
c) Temperature
d) Specific gravity of the electrolyte

A

9. Cells are connected in series in order to increase the
a) Current capacity
b) Life of the cells
c) Voltage ratings
d) Terminal voltage

C

10. Internal voltage drop of a voltage source:
a) Independent of the load current supplied
b) Depends on the internal resistance of the source
c) Does not influence the terminal voltage
d) Does affect the emf of the source

B