1. Which property of an electrical conductor opposes the flow of current through it ?

Conductance

Resistance

Reluctance

Permeance

Answer: Resistance

Explanation:


2. What will be the resistance (in Ohms) of a resistor, when the dissipated power and the current flowing through the resistor is 12 W and 2 A respectively ?

6

24

2

3

Answer: 6

Explanation:


3. What will be the resistance (in Ohms) of a cylindrical wire, if the length, diameter and the resistivity of the wire is 4 m, 0.2 m and 0.4 Ohms-m respectively ?

49

56

54

51

Answer: 51

Explanation:


4. Which of the following material has the highest resistivity ?

Insulators

Conductors

Semiconductors

Superconductor

Answer: Insulators

Explanation:


5. Determine the power (in W) of a lamp of 220 V, when the resistance of the lamp is 100 Ohms ?

448

486

484

488

Answer: 484

Explanation:


6. What will be the voltage (in V) of a battery connected to a parallel plate capacitor with air as dielectric, having plate area of 6 sq. cm and separation between the plates is 2 mm, which stores a charge of 8.0 pC on the plates ?

3

9

6

5

Answer: 3

Explanation:


7. Which of the following statement is CORRECT ?

Superposition theorem is applicable to only those circuits that only have active elements.

Superposition theorem is applicable to only those circuits that only have passive elements.

Superposition theorem is applicable to only those circuits that only have linear bilateral elements.

Superposition theorem is applicable to only those circuits that only have non-linear bilateral elements.

Answer: Superposition theorem is applicable to only those circuits that only have linear bilateral elements.

Explanation:


8. The algebraic sum of all the voltages around any closed path is ?

Negative

Zero

One

Infinite

Answer: Zero

Explanation:


9. Which one of the following law is based on the principle of conservation of electric charge ?

Kirchhoff's Current Law

Kirchhoff's Voltage Law

Ohm‘s Law

Coulomb‘s Law

Answer: Kirchhoff's Current Law

Explanation:


10. The source resistance of an ideal voltage source should be ?

Infinite

One

Zero

Greater than one

Answer: Zero

Explanation: