Batteries -1

Question 1

When a lead-acid storage battery is being charged, a harmful effect to humans is:

Answer 1

Emission of hydrogen gas.

Question 2

A battery with a terminal voltage of 12.5 volts is to be trickle-charged at a 0.5 A rate. What resistance should be connected in series with the battery to charge it from a 110-V DC line?

Answer 2

195 ohms

Question 3

What capacity in amperes does a storage battery need to be in order to operate a 50 watt transmitter for 6 hours?
Assume a continuous transmitter load of 70% of the key-locked demand of 40 A, and an emergency light load of 1.5 A.

Answer 3

177 ampere-hours

Question 4

What is the total voltage when 12 Nickel-Cadmium batteries are connected in series?

Answer 4

15 volts

Question 5

The average fully-charged voltage of a lead-acid storage cell is:

Answer 5

2.06 volts

Question 6

A nickel-cadmium cell has an operating voltage of about:

Answer 6

1.25 volts