Basic Electrical Engineering MCQs
Contents
- 1 With rise in temperature, the specific resistance of metallic conductor _________
- 2 The SI unit of conductivity is
- 3 With an increase in temperature, the resistance decreases in case of
- 4 The most suitable material for making connecting wires is
- 5 Ampere-second is the unit of
- 6 In case of liquids, Ohm’s law is
- 7 The electrons in the last orbit of an atom are known as
- 8 Electric current is a
- 9 The value of temperature coefficient of resistance depends on
- 10 1 cm^3 of copper at room temperature has about
With rise in temperature, the specific resistance of metallic conductor _________
With rise in temperature, the specific resistance of metallic conductor _________
- Increases
- Decreases
- Remains the constant
- None of these
Correct answer: 1. Increases
The SI unit of conductivity is
The SI unit of conductivity is:
- mho/m
- mho-m
- ohm-m
- ohm/m
Correct answer: 1. mho/m
With an increase in temperature, the resistance decreases in case of
With an increase in temperature, the resistance decreases in case of:
- Copper
- Silver
- Carbon
- None of these
Correct answer: 3. Carbon
The most suitable material for making connecting wires is
The most suitable material for making connecting wires is:
- Nichrome
- Copper
- Constantan
- Any of above
Correct answer: 2. Copper
Ampere-second is the unit of
Ampere-second is the unit of:
- EMF
- Energy
- Charge
- Power
Correct answer: 3. Charge
In case of liquids, Ohm’s law is
In the case of liquids, Ohm’s law is:
- Partially obeyed
- Fully obeyed
- Not obeyed at all
- None of these
Correct answer: 2. Fully obeyed
The electrons in the last orbit of an atom are known as
The electrons in the last orbit of an atom are known as:
- Free electrons
- Valence electrons
- Bound electrons
- Thermionic electrons
Correct answer: 2. Valence electrons
Electric current is a
Electric current is a:
- Vector quantity
- Scalar quantity
- Any of above
- None of above
Correct answer: 2. Scalar quantity
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
1 cm^3 of copper at room temperature has about
1 cm^3 of copper at room temperature has about:
- 1000 free electrons
- 30 x 10^10 free electrons
- 2 x 10^5 free electrons
Correct answer: 4. 8.5 x 10^22 free electrons