Bennett Mechanical Test Electricity and Circuits 4

Question 1

What instrument measures electrical current?

Accepted Answer

Ammeter

Answer

Voltmeter

Answer

Ohmmeter

Answer

Barometer

Question 2

If voltage stays constant and resistance increases, what happens to current?

Accepted Answer

Current decreases

Answer

Current increases

Answer

Current stays the same

Answer

Current reverses

Question 3

What is created around a wire when current flows through it?

Accepted Answer

A magnetic field

Answer

A gravitational field

Answer

A vacuum

Answer

An electric charge buildup

Question 4

Three 4-ohm resistors are connected in series. What is the total resistance?

Accepted Answer

12 ohms

Answer

4 ohms

Answer

1.33 ohms

Answer

8 ohms

Question 5

Why are appliances in a home wired in parallel rather than series?

Accepted Answer

So each can operate independently at full voltage

Answer

To save copper

Answer

To increase total resistance

Answer

To reduce the number of outlets

Question 6

What does AC stand for in electricity?

Accepted Answer

Alternating current

Answer

Active current

Answer

Ampere coil

Answer

Applied charge

Question 7

What is the effect of connecting a voltmeter in series instead of parallel?

Accepted Answer

It blocks nearly all current due to high resistance

Answer

It reads correctly

Answer

It short-circuits the source

Answer

It measures resistance instead