Basic Electrical Engineering MCQs Part 24

Contents

- 1 How much time is needed for 100 μC of charge to pass a point in circuit if current flow is 20 mA
- 2 An electrical appliance consumes energy at a rate of 600 J/s. How many kWh it will consume in 4 h
- 3 The value of temperature coefficient of resistance depends on
- 4 Ampere-second is the unit of
- 5 When 2 V is applied in a circuit, a current of 2 µA flows through it. The conductance of circuit is

## 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:

- 2 s
- 5 s
- 5*10^-3 s
- 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:

- 1.2 kWh
- 2.4 kWh
- 3 kWh
- 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:

- Materials cross sectional area
- Volume of material
- Length of material
- Nature of material

Correct answer: 4. Nature of material

## Ampere-second is the unit of

Ampere-second is the unit of:

- EMF
- Energy
- Charge
- 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:

- 0.5 µmho
- 1 µmho
- 2 µmho
- 5 µmho

Correct answer: 2. 1 µmho

Solution:

R = V/I = 2/2uA = 1 MΩ

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