GROL Electrical Principles and Units 2

Question 1

A resistor dissipates 50 watts with 10 volts across it. What is the current through the resistor?

Accepted Answer

5 A

Answer

0.5 A

Answer

50 A

Answer

500 A

Question 2

Three resistors of 10 Ω, 20 Ω, and 30 Ω are connected in series. What is the total resistance?

Accepted Answer

60 Ω

Answer

5.45 Ω

Answer

18.18 Ω

Answer

600 Ω

Question 3

Two 100-ohm resistors are connected in parallel. What is the total resistance?

Accepted Answer

50 Ω

Answer

200 Ω

Answer

100 Ω

Answer

25 Ω

Question 4

A 2 kΩ and 8 kΩ resistor are connected in series across 100 V as a voltage divider. What is the voltage across the 2 kΩ resistor?

Accepted Answer

20 V

Answer

80 V

Answer

50 V

Answer

25 V

Question 5

A 12 V supply is connected to a 4 Ω and a 6 Ω resistor in parallel. What is the total current from the supply?

Accepted Answer

5 A

Answer

2 A

Answer

3 A

Answer

10 A

Question 6

What is the power dissipated by a 470-ohm resistor carrying 20 mA?

Accepted Answer

188 mW

Answer

9.4 mW

Answer

94 mW

Answer

940 mW

Question 7

Resistors R1 = 100 Ω and R2 = 200 Ω are connected in series across a 12 V supply. What is the voltage drop across R1?

Accepted Answer

4 V

Answer

6 V

Answer

8 V

Answer

12 V