# Basic Electrical Engineering MCQs Part 24

Basic Electrical Engineering MCQs Part 24

## How much time is needed for 100 μC of charge to pass a point in circuit if current flow is 20 mA

How much time is needed for 100 μC of charge to pass a point in circuit if current flow is 20 mA:

1. 2 s
2. 5 s
3. 5*10^-3 s
4. 15*10^-3 s

Correct answer: 3. 5*10^-3 s

Solution: t = q/I = 100 * 10^-6 / 20 mA * 10^-3 = 5*10^-3 s

## An electrical appliance consumes energy at a rate of 600 J/s. How many kWh it will consume in 4 h

An electrical appliance consumes energy at a rate of 600 J/s. How many kWh it will consume in 4 h:

1. 1.2 kWh
2. 2.4 kWh
3. 3 kWh
4. None of these

Correct answer: 2. 2.4 kWh

Solution:

Power (P) = 600 J/s = 600 W

Energy consumed = E = Pt = 600 * 4 h = 2400 Wh = 2.4 kWh

## The value of temperature coefficient of resistance depends on

The value of temperature coefficient of resistance depends on:

1. Materials cross sectional area
2. Volume of material
3. Length of material
4. Nature of material

Correct answer: 4. Nature of material

## Ampere-second is the unit of

Ampere-second is the unit of:

1. EMF
2. Energy
3. Charge
4. Power

Correct answer: 3. Charge

## When 2 V is applied in a circuit, a current of 2 µA flows through it. The conductance of circuit is

When 2 V is applied in a circuit, a current of 2 µA flows through it. The conductance of circuit is:

1. 0.5 µmho
2. 1 µmho
3. 2 µmho
4. 5 µmho

Correct answer: 2. 1 µmho

Solution:

R = V/I = 2/2uA = 1 MΩ

Conductance (G) = 1/R = 1/1 MΩ = 1 µmho