Bennett Mechanical Test Electricity and Circuits 3

Question 1

Two 6-ohm resistors are connected in parallel. What is the total resistance?

Accepted Answer

3 ohms

Answer

For two equal resistors in parallel, total resistance is half of one, so 3 ohms.

Question 2

What is the unit of electrical power?

Accepted Answer

Watt

Answer

Electrical power is measured in watts, equal to volts times amps.

Question 3

What happens to total resistance when more resistors are added in series?

Accepted Answer

It increases

Answer

Series resistances add together, so total resistance increases with each one.

Question 4

Which component stores electrical charge?

Accepted Answer

Capacitor

Answer

A capacitor stores charge on its plates and releases it when needed.

Question 5

What is the power consumed by a device drawing 2 amps at 120 volts?

Accepted Answer

240 watts

Answer

Power equals voltage times current, so 120 V × 2 A = 240 W.

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