1. Kirchhoff's law is applicable to ?

d.c. circuits only

both a.c. and well d.c. circuits

passive networks only

a.c. circuits only

Answer: both a.c. and well d.c. circuits

Explanation:


2. Power factor of electric bulb is ?

leading

unity

zero

lagging

Answer: unity

Explanation:


3. Form Factor is the ratio of ?

r.m.s. value/average value

r.m.s. value/peak value

average value/r.m.s. value

average value/peak value

Answer: r.m.s. value/average value

Explanation:


4. A network which contains one or more than one source of e.m.f. is known as ?

passive network

active network

linear network

non-linear network

Answer: active network

Explanation:


5. In a pure inductive circuit ?

the current leads the voltage by 90

the current can lead or lag by 90

the current is in phase with the voltage

the current legs behind the voltage by 90

Answer: the current legs behind the voltage by 90

Explanation:


6. Which of the following coils will have large resonant frequency ?

A coil with large distributed capacitance

A coil with low capacitance

A coil with large resistance

A coil with low resistance less

Answer: A coil with large distributed capacitance

Explanation:


7. Application of Norton's theorem a circuit yields to ?

equivalent impedance

equivalent current source

equivalent current source and impedance in series

equivalent current source and impedance in parallel

Answer: equivalent current source and impedance in parallel

Explanation:


8. At very low frequencies a series R-C circuit behaves as almost purely ?

capacitive

resistive

inductive

none of the above

Answer: capacitive

Explanation:


9. A terminal where three or more branches meet is known as ?

combination

anode

node

terminus

Answer: node

Explanation:


10. The period of a wave is ?

expressed in amperes

the same as frequency

time required to complete one cycle

none of the above

Answer: time required to complete one cycle

Explanation: