Power and energy in circuits (P = I²R, E = QV)

Question 1

A 20 Ω heating element transfers 80 W. What current flows through it, in A?

Answer A

Question 2

50 C of charge passes through a potential difference of 12 V. How much energy is transferred, in J?

Answer J

Question 3

A current of 5 A flows through a 50 Ω resistor. What power is transferred, in W?

Answer W

Question 4

A 20 Ω heating element transfers 180 W. What current flows through it, in A?

Answer A

Question 5

100 C of charge passes through a potential difference of 3 V. How much energy is transferred, in J?

Answer J

Question 6

A current of 4 A flows through a 50 Ω resistor. What power is transferred, in W?

Answer W

Question 7

A 10 Ω heating element transfers 1000 W. What current flows through it, in A?

Answer A

Question 8

200 C of charge passes through a potential difference of 12 V. How much energy is transferred, in J?

Answer J

Question 9

A current of 3 A flows through a 4 Ω resistor. What power is transferred, in W?

Answer W

Question 10

A 2 Ω heating element transfers 50 W. What current flows through it, in A?

Answer A

Question 11

10 C of charge passes through a potential difference of 9 V. How much energy is transferred, in J?

Answer J

Question 12

A current of 4 A flows through a 4 Ω resistor. What power is transferred, in W?

Answer W

Question 13

A 20 Ω heating element transfers 2000 W. What current flows through it, in A?

Answer A

Question 14

20 C of charge passes through a potential difference of 9 V. How much energy is transferred, in J?

Answer J

Question 15

A current of 2 A flows through a 2 Ω resistor. What power is transferred, in W?

Answer W

Question 16

A 20 Ω heating element transfers 500 W. What current flows through it, in A?

Answer A