1. DC average current of a center taped 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 center taped 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) (I_{m}2/2 ᴨ^{2})R_{L}

c) (I_{m}2/ ᴨ^{2})R_{L}

d) (4I_{m}2/ ᴨ^{2})R_{L}

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_{DC}I

_{DC}. We know V

_{DC}for a center taped rectifier is 2V

_{m}/ᴨ and I

_{DC}for a center tap rectifier is 2I

_{m}/ᴨ. We also know V

_{DC}= I

_{DC}/R

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

_{m}2/ ᴨ

^{2})R

_{L}.

3. Ripple factor of center taped full wave rectifier is

a) 1.414

b) 1.21

c) 1.3

d) 0.48

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

a) 100Hz

b) 50Hz

c) 25Hz

d) 500Hz

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

a) 0.623

b) 0.678

c) 0.693

d) 0.625

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6. If peak voltage on a center taped 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) 5.7V

d) 10.7V

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_{m}um reveres bias voltage that can be appeared across a diode in the circuit. If PIV rating of the diode is less than this value breakdown of diode may occur. For a center tap full wave rectifier PIV of diode is 2V

_{m}– VD. Therefore, PIV is 10-0.7V.

7. Efficiency of center taped full wave rectifier is

a) 50%

b) 81.2%

c) 40.6%

d) 45.3%

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_{m}um AC power delivered to load. It is usually expressed in percentage. For center taped full wave rectifier, it is 81.2%.

8. In an center taped full wave rectifier, the input sine wave is 20sin500 ᴨt. The average output voltage is

a) 12.73V

b) 6.93V

c) 11.62V

d) 3.23V

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_{m}sin wt. Therefore, E

_{m}=20 Hence output voltage is 2E

_{m}/ ᴨ. That is 40/ ᴨ.

9. In an center taped full wave rectifier, the input sine wave is 200sin50 ᴨt. If load resistance is of 1k then average DC power output of half wave rectifier is

a) 12.56W

b) 16.20W

c) 4.02W

d) 8.04W

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_{m}sin wt. On comparing E

_{m}= 200 Power = 4E

_{m}2/ ᴨ

^{2}R

_{L}= 800/ ᴨ

^{2}x 1000 = 16.20W.

10. In an center taped 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 center taped full wave rectifier have double the frequency of input, output frequency is 100Hz.