15. electrolytic capacitors must be connected into a circuit such that: a. volta

Question

15. electrolytic capacitors must be connected into a circuit such that:

a. voltage rating marked is not exceeded.

b. reversal of polarity does not happen.

c. positive lead toward positive charge

d. all of these.

16. the time constant for a capacitor is:
a. directly proportional to the capacitance in the circuit.

b. directly proportional to the resistance in the circuit.

c. the time required to charge to 63% or to discharge to 37%.

d. all of these.

17. if a .05 microfarad and .1 microfarad
capacitor are connected in parallel across the 20 volt Source the total capacitance equals ___________ and each capacitor drops
a. .05 microfarad , 15 volt
b. .15 microfarad, 20 volt
c. .15 microfarad, 10 volt
d. .10 microfarad, 20 volt

Explanation / Answer

15) All of these (d) : Electrolytic capacitors have polarity. If a supply is given above its marked value, then it may get damaged.

16) All of these (d) : time constant = R*C where R is resistance of the circuit

C is Capacitance of the circuit

17) 0.15 microfarad, 20 Volt (b)

since capacitors are in parallel, they will simply get added and supply voltage in the circuit will remain same.

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