MCQs of Diode theory and applications (Basic Electronics - 3110016)

Basic Electronics (3110016) MCQs

MCQs of Diode theory and applications

Showing 81 to 90 out of 108 Questions

81.

In stepdown transformer, which is larger?

(a)	Primary voltage
(b)	Secondary voltage
(c)	Neither
(d)	No answer possible

82.

A transformer has a turn’s ratio of 2:1, what is the peak secondary voltage if 115 V RMS is applied to the primary winding?

(a)	57.5 V
(b)	81.3 V
(c)	230 V
(d)	325 V

83.

With a half-wave rectified voltage across the load resistor, load current flows for what part of a cycle?

(a)	0⁰
(b)	90⁰
(c)	180⁰
(d)	360⁰

84.

Suppose line voltage may be as low as 105 V RMS or as high as 125 V RMS in a half-wave rectifier. With a 5:1 step-down transformer, the minimum peak load voltage is closest to

(a)	21 V
(b)	25 V
(c)	29.7 V
(d)	35.4 V

85.

The voltage out of a bridge rectifier is a

(a)	Half-wave signal
(b)	Full-wave signal
(c)	Bridge-rectified signal
(d)	Sine wave

86.

If the line voltage is 115 V RMS, a turns ratio of 5:1 means the RMS secondary voltage is closest to

(a)	15 V
(b)	23 V
(c)	30 V
(d)	35 V

87.

What is the peak load voltage in a full-wave rectifier if the secondary voltage is 20 V RMS?

(a)	0 V
(b)	0.7 V
(c)	14.1 V
(d)	28.3 V

88.

We want a peak load voltage 40 V out of a bridge rectifier. What is the approximate RMS value of secondary voltage?

(a)	0 V
(b)	14.4 V
(c)	28.3 V
(d)	56.6 V

89.

With a full-wave rectified voltage across the load resistor, load current flows for what part of a cycle?

(a)	0⁰
(b)	90⁰
(c)	180⁰
(d)	360⁰

90.

What is the peak load voltage out of a bridge rectifier for a secondary voltage of 12.6 V RMS? (Use second approximation.)

(a)	7.5 V
(b)	16.4 V
(c)	17.8 V
(d)	19.2 V

Showing 81 to 90 out of 108 Questions