1. DC average current of a bridge full wave rectifier

(Where I_{m} is the maxI_{m}um peak current of input)

a) 2I_{m}/ᴨ

b) I_{m}/ᴨ

c) I_{m}/2ᴨ

d) 1.414I_{m}/ᴨ

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2. DC power output of bridge full wave rectifier is equal to

(I_{m} is the peak current and R_{L} is the load resistance)

a) (2I_{m}^{2}/ ᴨ^{2})R_{L}

b) (4I_{m}^{2}/ ᴨ^{2})R_{L}

c) (I_{m}^{2}/ ᴨ^{2})R_{L}

d) (I_{m}^{2}/2 ᴨ^{2})R_{L}

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_{D}CIDC. We know V

_{D}c for a bridge rectifier is 2V

_{m}/ᴨ and IDC for a bridge rectifier is 2I

_{m}/ᴨ. We also know V

_{D}C = IDC/R

_{L}. Hence output power is (4I

_{m}

^{2}/ ᴨ

^{2})R

_{L}

3. Ripple factor of bridge full wave rectifier is

a) 1.414

b) 1.212

c) 0.482

d) 1.321

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4. If input frequency is 50Hz then ripple frequency of bridge full wave rectifier will be equal to

a) 200Hz

b) 50Hz

c) 45Hz

d) 100Hz

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5. Transformer utilization factor of a bridge full wave rectifier is equal to

a) 0.623

b) 0.812

c) 0.693

d) 0.825

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6. If peak voltage on a bridge full wave rectifier circuit is 5V and diode cut-in voltage is 0.7, then peak inverse voltage on diode will be

a) 4.3V

b) 9.3V

c) 8.6V

d) 3.6V

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_{m}-2V

_{D}. ie 5-1.4.

7. Efficiency of bridge full wave rectifier is

a) 81.2%

b) 50%

c) 40.6%

d) 45.3%

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8. In an bridge full wave rectifier, the input sine wave is 40sin100 ᴨt. The average output voltage is

a) 22.73V

b) 16.93V

c) 25.47V

d) 33.23V

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_{m}sin wt. Therefore, E

_{m}=40 Hence output voltage is 2E

_{m}/ ᴨ. That is 80/ ᴨ.

9. Number of diodes used in a full wave bridge rectifier is

a) 1

b) 2

c) 4

d) 6

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10. In an bridge full wave rectifier, the input sine wave is 250sin100 ᴨt. The output ripple frequency of rectifier will be

a) 50Hz

b) 200Hz

c) 100Hz

d) 25Hz

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_{m}sin wt. Therefore, w = 100ᴨ that is, frequency f = w/2ᴨ = 50Hz Since output of full wave bridge rectifier have double the frequency of input, output frequency is 100Hz.