Engineering MCQs

What is the difference between a transformer and an inductor in an electrical circuit.

a. A transformer is used to convert AC voltage levels, while an inductor is used to store energy in a magnetic field.
b. An inductor is used to convert AC voltage levels, while a transformer is used to store energy in a magnetic field.
c. A transformer and an inductor are the same thing.
d. A transformer and an inductor have no function in an electrical circuit.
Answer: a. A transformer is used to convert AC voltage levels, while an inductor is used to store energy in a magnetic field.

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What is the difference between direct current (DC) and alternating current (AC).

a. DC flows in only one direction, while AC flows in two directions.
b. DC flows in two directions, while AC flows in only one direction.
c. DC and AC are the same thing.
d. DC and AC do not exist in electrical circuits.
Answer: a. DC flows in only one direction, while AC flows in two directions.

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What is the difference between a multimeter and an oscilloscope.

a. A multimeter measures current, while an oscilloscope measures voltage.
b. A multimeter measures voltage, while an oscilloscope measures current.
c. A multimeter and an oscilloscope are the same thing.
d. A multimeter measures various electrical quantities, while an oscilloscope displays voltage over time.
Answer: d. A multimeter measures various electrical quantities, while an oscilloscope displays voltage over time.

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What is the difference between an oscillator and an amplifier in an electrical circuit.

a. An oscillator generates a signal, while an amplifier amplifies a signal.
b. An oscillator amplifies a signal, while an amplifier generates a signal.
c. An oscillator and an amplifier are the same thing.
d. An oscillator and an amplifier have no function in an electrical circuit.
Answer: a. An oscillator generates a signal, while an amplifier amplifies a signal.

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