# Basic Electrical Engineering Questions and Answers – Waveform Terms and Definitions

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This set of Basic Electrical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Waveform Terms and Definitions”.

1. The variation of a quantity such as voltage or current shown on a graph is known as ___________
a) Waveform
b) Peak value
c) Instantaneous value
d) Period

Explanation: The variation of a quantity, which is voltage or current in this case, shown on a graph with the x-axis as time is known as a waveform.

2. What is the duration of one cycle known as _________
a) Waveform
b) Peak value
c) Instantaneous value
d) Period

Explanation: The duration of one cycle is known as a period. A function which repeats the same waveform at equal intervals of time is known as a periodic function.

3. The repetition of a variable quantity, recurring at equal intervals, is known as ___________
a) Waveform
b) Instantaneous value
c) Cycle
d) Period

Explanation: Each repetition of a variable quantity, recurring at equal intervals, is termed as a cycle.
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4. The value of a given waveform at any instant time is termed as ___________
a) Waveform
b) Instantaneous value
c) Cycle
d) Period

Explanation: Instantaneous value is the value of the waveform at that instant. Hence the value of a given waveform at any instant time is termed as instantaneous value.

5. The maximum instantaneous value measured from zero value is known as?
a) Peak value
b) Peak to peak value
c) Cycle
d) Period

Explanation: The maximum instantaneous value measured from the zero value is termed as the peak value.
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6. The maximum variation between the maximum positive and the maximum negative value is known as?
a) Peak value
b) Peak to peak value
c) Cycle
d) Period

Explanation: The maximum variation between the maximum positive instantaneous value and the maximum negative instantaneous value is the peak-to-peak value.

7. What is the correct relation between the peak value and peak to peak value for a sinusoidal waveform?
a) Vp=4Vp-p
b) Vp=Vp-p
c) Vp-p=2Vp
d) Vp=2Vp-p

Explanation: The maximum variation between the maximum positive instantaneous value and the maximum negative instantaneous value is the peak-to-peak value. For a sinusoidal waveform, it is twice the peak value. Hence Vp-p=2Vp.

8. If the peak to peak voltage is 10V, calculate the peak voltage.
a) 10V
b) 2V
c) 4V
d) 5V

Explanation: Vp-p=2Vp
Substituting the values from the question, we get Vp=5V.

9. If the peak voltage is 9V, calculate the peak to peak voltage.
a) 9V
b) 20V
c) 18V
d) 12V

Explanation: Vp-p=2Vp
Substituting the values from the question, we get Vp-p= 18V.

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