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