23 July 2011

Objective Type Questions - Electronics (Network Theorems)

1. While Thevenising a circuit between two terminals, Thevenin voltage equals ____________

(a) short circuit terminal voltage

(b) open circuit terminal voltage

(c) e.m.f. of batter nearest to the terminals

(d) net voltage available in the circuit

2. The unit of output admittance of two-port network is _________

(a) ohm     (b) henry     (c) ampere     (d) mho

3. The input impedance of a two port network is measured with ___________

(a) input open     (b) output open     (c) output shorted     (d) input shorted

4. Thevenin's theorem can be applied to _________

(a) d.c. circuits only     (b) a.c. circuits only     (c) both d.c. and a.c. circuits    (d) none of these

5. Short - circuit current flows through a load of __________

(a) infinite impedance     (b) zero impedance     (c) capacitative impedance     (d) inductive impedance

6. Open circuit voltage is the p.d between two points, having ________

(a) zero impedance      (b) finite impedance      (c) infinite impedance      (d) reactive impedance

7. In the h-parameter equivalent circuit of a two port network, the output port can be represented by _________

(a) amplifier circuit     (b) signal generator     (c) Norton equivalent     (d) Thevenin equivalent circuit

8. In a two port network, the ratio of change of input voltage to the change of input currents with output shorted, is called ________

(a) forward current gain     (b) input impedance     (c) output admittance     (d) short circuit gain

9. Thevenin's equivalent of a circuit consists of _________

(a) a single current source and a single voltage source

(b) voltage source with a series resistance

(c) current source with a parallel resistance

(d) voltage source with a parallel resistance

10. Norton's equivalent of a circuit consists of _________

(a) ideal voltage source and a parallel resistor

(b) ideal current source and a parallel resistor

(c) ideal voltage source and a series resistor

(d) ideal current source and a series resistor