Why didn’t you invite him for the party?

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Practice questions from this topic.

Current flows in a circuit when

A. A switch is opened

B. A switch is closed

C. The switch is either open or closed

D. There is no voltage

Answer: B

Eighttenths coulomb passes a point in 4 s. The current in amperes is

A. 1.6 A

B. 16 A

C. 2 A

D. 0.2 A

Answer: D

The unit of electrical charge is the

A. Coulomb

B. Joule

C. Volt

D. Watt

Answer: A

The nominal value of a brown, black, yellow, and gold resistor is 100,000 ohms.

A. True

B. False

Answer: A

Electrons in the outer orbit are called

A. Nuclei

B. Valences

C. Waves

D. Shells

Answer: B

A voltmeter is connected across the current path.

A. True

B. False

Answer: A

An ammeter is connected across the current path.

A. True

B. False

Answer: B

When the current is 2.5 A, how many coulombs pass a point in 0.2 s?

A. 12.5 C

B. 1.25 C

C. 0.5 C

D. 5 C

Answer: C

A wiper is the sliding contact in a

A. Switch

B. Photoconductive cell

C. Thermistor

D. Potentiometer

Answer: D

A twoterminal variable resistor is known as a

A. Potentiometer

B. Thermistor

C. Rheostat

D. Wiper

Answer: C

A red, red, orange, gold resistor has a nominal value of

A. 22,000 Ω

B. 2,200 Ω

C. 22 Ω

D. 2.2 Ω

Answer: A

An ohmmeter is an instrument for measuring

A. Current

B. Voltage

C. Resistance

D. Wattage

Answer: C

The atomic number is the number of neutrons in the nucleus.

A. True

B. False

Answer: B

A free electron is a valence electron that has broken away from its parent atom.

A. True

B. False

Answer: A

A thermistor is a type of

A. Switch

B. Resistor

C. Battery

D. Power supply

Answer: B

Which of the following is not a type of energy source?

A. Generator

B. Rheostat

C. Solar cell

D. Battery

Answer: B

The maximum resistance value for a brown, red, yellow, gold resistor is

A. 126,000 Ω

B. 126,600 Ω

C. 114,000 Ω

D. 132,000 Ω

Answer: A

A neutral atom is one with an equal number of protons and electrons.

A. True

B. False

Answer: A

An open circuit is one that has a complete current path.

A. True

B. False

Answer: B

An ammeter is an electrical instrument used to measure

A. Current

B. Voltage

C. Resistance

D. None of the above

Answer: A