MCQs on Basic Electrical – 1
1. In a rectangular wave, peak factor is
(a) 1.6
(b) 0.7
(c) 1
(d) 1.1
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
2. What is the form factor of a triangular wave?
(a) 1.6
(b) 1.4.
(c) 1.16
(d) 1.7
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
3. In a square wave, peak factor is
(a) 1.1
(b) 1
(c) 0
(d) 0.7
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]
4. In a rectangular wave, form factor is
(a) 1.6
(b) 0.7
(c) 1
(d) 1.1
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
5. In a square wave, form factor is
(a) 1
(b) 0.7
(c) 1.6
(d) 1.1
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
6. With the rise in temperature the resistance of carbon
(a) decreases.
(b) increases.
(c) remain constant.
(d) none of the above.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
7. A trimmer is a variable capacitor in which capacitance is varied by changing
(a) applied voltage.
(b) applied frequency.
(c) Area of plates.
(d) distance between plates.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] D [/accordion-item][/accordion]
8. If in an AC circuit, capacitance reactance is greater than the inductive reactance, then
(a) current lags from the voltage.
(b) current leads from the voltage.
(c) current and voltage are in phase.
(d) none of the above.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]
9. The form factor of an alternating electric current is the ratio of
(a) average value to The RMS value.
(b) maximum value to the average value.
(c) RMS value to the average value.
(d) maximum value to The RMS value.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
10. The peak factor of alternating electric current is the ratio of
(a) average value to he RMS value.
(b) maximum value to the average value.
(c) RMS value to the average value.
(d) maximum value to The RMS value.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] D [/accordion-item][/accordion]
11. With rise in temperature the resistance of conductors
(a) increases.
(b) decreases.
(c) remains constant.
(d) first increase then decrease.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
12.With rise in temperature the resistance of semi-conductor
(a) decreases.
(b) increases.
(c) first increases and then decreases.
(d) remains constant.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
13.With rise in temperature the resistance of insulator
(a) increases.
(b) decreases.
(c) remains constant.
(d) first increase then decrease.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]
14. The temperature coefficient of resistance of an insulator is
(a) zero.
(b) positive.
(c) negative.
(d) unity.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
15. If the number of resistances are connected in parallel then the equivalent resistance is
(a) decreases.
(b) increases.
(c) remain same.
(d) none of the above.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]