ONLINE MCQ EE-BASIC ELECTRICAL PART 15

[1] Which of the following can vary with ac, but never with dc?

A.  Power
B.  Voltage
C.  Frequency
D.  Amplitude

Answer

[2] If all other factors are kept constant, the inductance of the air-core coil is not affected by
A.  The frequency
B.  The number of turns
C.  The diameter of the coil
D.  The length of the coil

Answer

[3] The length of time between a point in one cycle and the same point in the next cycle of an ac wave is the

A.  Frequency
B.  Magnitude
C.  Period
D.  Polarity

Answer

[4] Capacitance acts to store electrical energy as
A.  Current
B.  Voltage
C.  A magnetic field
D.  An electric field

Answer

[5] On a spectrum analyzer, a  ac signal having only one frequency component looks like
A.  A single pip
B.  A sine wave
C.  A square wave
D.  A sawtooth wave

Answer

[6] A ferromagnetic core is place in the inductor to
A.  Increase the current carrying capacity
B.  Increase the inductance
C.  Limit the current
D.  Reduce the inductance

Answer

[7] The period of a ac wave, in seconds is
A.  The same as the frequency in hertz
B.  Not related to the frequency in any way
C.  Equal to 1 divided by the frequency in hertz
D.  Equal to the peak amplitude in volts divided by the frequency in hertz

Answer

[8] An inductor works by
A.  Charging a piece of wire
B.  Storing energy as a magnetic field
C.  Choking off dc
D.  Introducing resistance into a field

Answer

[9] As capacitor plate area increases
A.  The capacitance increases
B.  The capacitance decreases
C.  The capacitance does not change
D.  The current handling ability decreases

Answer

[10] In a small inductance
A.  Energy is stored and released slowly
B.  The current flow is always large
C.  The current flow is always slow
D.  Energy is stored and released quickly

Answer

ONLINE MCQ EE AND ECE-Measurements and Instrumentation Part 3
ONLINE MCQ EE-BASIC ELECTRICAL PART 14

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