Explore topic-wise MCQs in Electrical Engineering.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

In an oscilloscope screen, Linear sweep signal is applied at the

A. Vertical axis
B. Horizontal axis
C. Origin
D. Both vertical and horizontal axis
Answer» C. Origin
Discussion
2.

A 1000 Hz sinusoidal voltage is connected to both X and Y inputs of a CRO. Which of the following waveforms is seen on CRO ?

A. Sine wave
B. Circle
C. Ellipse
D. Straight line
Answer» E.
Discussion
3.

A stationary closed Lissajous pattern on an oscilloscope has 3 horizontal tangencies and 2 vertical tangencies for a horizontal input with frequency 3 kHz. The frequency of the vertical input is

A. 1.5 kHz
B. 2 kHz
C. 3 kHz
D. 4.5 kHz
Answer» E.
Discussion
4.

CRO (Cathod Ray Oscilloscope) CANNOT be used to measure _______.

A. frequency
B. phase
C. power
D. voltage
Answer» D. voltage
Discussion
5.

Decibel scale is useful while measuring voltages covering

A. Wide frequency ratio
B. Wide voltage ratio
C. Narrow frequency range
D. Narrow voltage range
Answer» B. Wide voltage ratio
Discussion
6.

A voltage of 6 cos(100πt) V is fed as y-input to a CRO. The waveform seen on the screen of the CRO is shown in the figure. The Y and X axes settings for the CRO are respectively

A. 1 V/div and 1 ms/div
B. 1 V/div and 2 ms/div
C. 2 V/div and 1 ms/div
D. 2 V/div and 2 ms/div
Answer» E.
Discussion
7.

Astigmatism control on CRO panel is used for ______ control.

A. Focus
B. brightness
C. beam position
D. trace rotation
Answer» B. brightness
Discussion
8.

One cycle of square wave signal observed on an oscilloscope is found to occupy 6 cm at a scale setting of 30 μs/cm. What is the signal frequency?

A. 1.8 kHz
B. 5.55 kHz
C. 18 kHz
D. 55.5 kHz
Answer» C. 18 kHz
Discussion