MCQs on Basic Electrical – 1

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 1. In a rectangular wave, peak factor is
(a) 1.6
(b) 0.7
(c) 1
(d) 1.1

 2. What is the form factor of a triangular wave?
(a) 1.6
(b) 1.4.
(c) 1.16
(d) 1.7 

 3. In a square wave, peak factor is
(a) 1.1
(b) 1
(c) 0
(d) 0.7 

 4. In a rectangular wave, form factor is
(a) 1.6
(b) 0.7
(c) 1
(d) 1.1 

 5. In a square wave, form factor is
(a) 1
(b) 0.7
(c) 1.6
(d) 1.1

 6. With the rise in temperature the resistance of carbon
(a) decreases.
(b) increases.
(c) remain constant.
(d) none of the above.

 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. 

 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. 

 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. 

 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. 

 11. With rise in temperature the resistance of conductors
(a) increases.
(b) decreases.
(c) remains constant.
(d) first increase then decrease.

 12.With rise in temperature the resistance of semi-conductor
(a) decreases.
(b) increases.
(c) first increases and then decreases.
(d) remains constant. 

 13.With rise in temperature the resistance of insulator
(a) increases.
(b) decreases.
(c) remains constant.
(d) first increase then decrease.  

 14. The temperature coefficient of resistance of an insulator is
(a) zero.
(b) positive.
(c) negative.
(d) unity. 

 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. 

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