1. According to which of the alternating current values in the cross-sectional area of a conductor with regard to the heating effect is selected ?

peak value

half peak value

average value

r.m.s. value

Answer: r.m.s. value

Explanation:


2. Time constant of a capacitive circuit ?

increases with the decrease of capacitance and decrease of resistance

increases with the decrease of capacitance and increase of resistance

increases with the increase of capacitance and decrease of resistance

increase with increase of capacitance and increase of resistance

Answer: increase with increase of capacitance and increase of resistance

Explanation:


3. For the same peak value which of the following wave will have the highest r.m.s. value ?

square wave

half wave rectified sine wave

triangular wave

sine wave

Answer: square wave

Explanation:


4. The period of a wave is ?

the same as frequency

time required to complete one cycle

expressed in amperes

none of the above

Answer: time required to complete one cycle

Explanation:


5. In a highly capacitive circuit the ?

apparent power is equal to the actual power

reactive power is more than the apparent power

reactive power is more than the actual power

actual power is more than its reactive power

Answer: reactive power is more than the actual power

Explanation:


6. The power is measured m terms of decibles in case of ?

electronic equipment

transformers

current transformers

auto-transformers

Answer: electronic equipment

Explanation:


7. The best place to install a capacitor is ?

very near to inductive load

across the terminals of the inductive load

far away from the inductive load

any where

Answer: across the terminals of the inductive load

Explanation:


8. In an A.C. circuit power is dissipated in ?

resistance only

inductance only

capacitance only

none of the above

Answer: resistance only

Explanation:


9. A parallel resonant circuit can be used ?

as a high impedance

to reject a small band of frequencies

both (a) and (b)

to amplify certain frequencies

Answer: both (a) and (b)

Explanation:


10. Higher the Q of a series circuit ?

broader its resonance curve

narrower its pass band

greater its bandwidth

sharper its resonance

Answer: narrower its pass band

Explanation: