BMST Electrical Circuits and Ohm's Law 4

Question 1

A 60 W light bulb operates at 120 V. What is its resistance?

Accepted Answer

240 Ω

Answer

2 Ω

Answer

72 Ω

Answer

720 Ω

Question 2

In a series circuit, which quantity remains the same throughout?

Accepted Answer

Current

Answer

Voltage

Answer

Resistance

Answer

Power

Question 3

What is the voltage drop across a 15 Ω resistor when 3 A flows through it?

Accepted Answer

45 V

Answer

5 V

Answer

18 V

Answer

90 V

Question 4

Which material is the best conductor of electricity?

Accepted Answer

Copper

Answer

Rubber

Answer

Glass

Answer

Wood

Question 5

A circuit has a 12 V source and three equal resistors in series drawing 0.5 A. What is each resistor's value?

Accepted Answer

8 Ω

Answer

4 Ω

Answer

6 Ω

Answer

12 Ω

Question 6

What does Kirchhoff's Voltage Law (KVL) state?

Accepted Answer

The sum of voltage drops around a closed loop equals the source voltage

Answer

Current at a junction is conserved

Answer

Resistance is proportional to length

Answer

Power equals current squared times resistance

Question 7

If a resistor's resistance doubles and the voltage across it stays the same, what happens to current?

Accepted Answer

Current halves

Answer

Current doubles

Answer

Current quadruples

Answer

Current stays the same