OAR OAR Mechanical Comprehension: Electricity 4

Question 1

A 60W bulb and a 100W bulb are connected in series. Which bulb glows brighter?

Accepted Answer

The 60W bulb

Answer

The 100W bulb

Answer

They glow equally

Answer

Neither glows

Question 2

What is the relationship between frequency and period of an AC waveform?

Accepted Answer

f = 1/T

Answer

f = T

Answer

f = T²

Answer

f = 2T

Question 3

What happens to resistance as the temperature of a metal conductor increases?

Accepted Answer

Resistance increases

Answer

Resistance decreases

Answer

Resistance stays constant

Answer

Resistance becomes zero

Question 4

A 12V circuit draws 3A. A second identical load is added in parallel. What is the new total current?

Accepted Answer

6A

Answer

3A

Answer

1.5A

Answer

9A

Question 5

What is the standard frequency of AC power in the United States?

Accepted Answer

60 Hz

Answer

50 Hz

Answer

120 Hz

Answer

25 Hz

Question 6

Which of the following best describes an electrical insulator?

Accepted Answer

A material that opposes electron flow strongly

Answer

A material that allows easy electron flow

Answer

A material that stores charge

Answer

A material that converts AC to DC

Question 7

In a parallel circuit, if one branch is open (broken), what happens to the other branches?

Accepted Answer

The other branches continue operating normally

Answer

All branches stop working

Answer

Voltage drops to zero

Answer

Current doubles in remaining branches