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Filters – 1 – 1

1. The primary function of filter is to :

(a) minimize AC input variations
(b) suppress odd harmonics in the rectifier output
(c) stabilize DC level of the output voltage
(d) 
 remove ripples from the rectifier output

ANSWER

EXPLANATION

2. The function of a bleeder resistor in a power supply is :

(a) the same as that of load resistor
(b) to ensure a minimum current drain in the circuit
(c) to increase the output dc voltage
(d) 
to increase the output current

ANSWER

EXPLANATION

3. A 10 V power supply would use …….. as filter capacitor.

(a) paper capacitor
(b) mica capacitor
(c) electrolytic capacitor
(d)
 air capacitor

ANSWER

EXPLANATION

4. A 1000 V power supply would use …….. as a filter capacitor.

(a) paper capacitor
(b) air capacitor
(c) mica capacitor
(d) 
electrolytic capacitor

ANSWER

EXPLANATION

5. The …… filter circuit results in the best voltage regulation.

(a) choke input
(b) capacitor input
(c) resistance input
(d) 
none of the above

ANSWER

EXPLANATION

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