A 15 V source is connected across a 12 Ω resistor. How much energy is used in three minutes?

0.938 Wh

5.6 Wh

56.25 Wh

938 Wh

Correct Answer : Option (A) : 0.938 Wh

Recently Updated in Energy and Power Questions

When the current through a 12 kΩ resistor is 8 mA, the power is

7.68 W

7.68 mW

76.8 W

768 mW

Correct Answer : 768 mW

A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is

0.58 Ah

2.1 Ah

21 Ah

58 Ah

Correct Answer : 21 Ah

At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

1.286 kWh

12.85 kWh

252 kWh

535 kWh

Correct Answer : 1.286 kWh