Operational Amplifiers MCQs

Question 1

What is the kilowatt-hour consumption of a 40 W lamp if it remains on for 1750 h?

Accepted Answer

70

Answer

43.75

Answer

43,750

Answer

70,000

Question 2

If the resistance in a circuit with constant voltage increases, the current will

Accepted Answer

decrease

Answer

increase

Answer

stay the same

Answer

Not enough information

Question 3

A damaged resistor

Accepted Answer

All of the above

Answer

may appear burned

Answer

may have an increased resistance value

Answer

may be checked with an ohmmeter

Question 4

Power supplies differ from batteries in that

Accepted Answer

None of the above

Answer

power supply output voltages are ac and not dc

Answer

power supply voltages are not stable

Answer

power supplies are low-current devices

Question 5

If voltage across a resistance doubles

Accepted Answer

none of the above

Answer

the current is halved

Answer

the resistance doubles

Answer

the current is unchanged

Question 6

Ohm's law describes the mathematical relationship between

Accepted Answer

resistance, voltage, and current

Answer

ohms, kilohms, and megohms

Answer

resistor size and resistor value

Answer

none of the above

Question 7

Energy is defined as the ability to

Accepted Answer

All of the above

Answer

produce heat

Answer

Produce light

Answer

produce sound

Question 8

A battery's capacity to deliver power is measured in

Accepted Answer

Ah

Answer

kWh

Answer

Wh

Answer

Vh

Question 9

The rate at which work is performed is called

Accepted Answer

power

Answer

current

Answer

energy

Answer

voltage