BMST Electrical Circuits and Ohm's Law 5

Question 1

A fuse is rated at 5 A. What is its primary function in a circuit?

Accepted Answer

Protect against excessive current

Answer

Increase voltage

Answer

Store electrical energy

Answer

Reduce resistance

Question 2

Three 12 Ω resistors are connected in parallel. What is the equivalent resistance?

Accepted Answer

4 Ω

Answer

1 Ω

Answer

12 Ω

Answer

36 Ω

Question 3

How much energy does a 100 W appliance use in 2 hours?

Accepted Answer

720,000 J

Answer

50 J

Answer

200 J

Answer

1,440,000 J

Question 4

Which circuit configuration ensures that all components receive the same voltage?

Accepted Answer

Parallel circuit

Answer

Series circuit

Answer

Short circuit

Answer

Open circuit

Question 5

A 5 Ω and 20 Ω resistor are in series with a 50 V source. What is the voltage drop across the 20 Ω resistor?

Accepted Answer

40 V

Answer

10 V

Answer

20 V

Answer

50 V

Question 6

What is the relationship between resistance and the cross-sectional area of a conductor?

Accepted Answer

Resistance decreases as area increases

Answer

Resistance increases as area increases

Answer

Resistance is unaffected by area

Answer

Resistance equals area squared

Question 7

A device draws 2 A at 110 V for 30 minutes. How many watt-hours of energy does it consume?

Accepted Answer

110 Wh

Answer

11 Wh

Answer

55 Wh

Answer

220 Wh