# Basic Electrical Engineering MCQs

Basic Electrical Engineering MCQs

## With rise in temperature, the specific resistance of metallic conductor _________

With rise in temperature, the specific resistance of metallic conductor _________

1. Increases
2. Decreases
3. Remains the constant
4. None of these

## The SI unit of conductivity is

The SI unit of conductivity is:

1. mho/m
2. mho-m
3. ohm-m
4. ohm/m

## With an increase in temperature, the resistance decreases in case of

With an increase in temperature, the resistance decreases in case of:

1. Copper
2. Silver
3. Carbon
4. None of these

## The most suitable material for making connecting wires is

The most suitable material for making connecting wires is:

1. Nichrome
2. Copper
3. Constantan
4. Any of above

## Ampere-second is the unit of

Ampere-second is the unit of:

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

## In case of liquids, Ohm’s law is

In the case of liquids, Ohm’s law is:

1. Partially obeyed
2. Fully obeyed
3. Not obeyed at all
4. None of these

## The electrons in the last orbit of an atom are known as

The electrons in the last orbit of an atom are known as:

1. Free electrons
2. Valence electrons
3. Bound electrons
4. Thermionic electrons

## Electric current is a

Electric current is a:

1. Vector quantity
2. Scalar quantity
3. Any of above
4. None of above

## 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

## 1 cm^3 of copper at room temperature has about

1 cm^3 of copper at room temperature has about:

1. 1000 free electrons
2. 30 x 10^10 free electrons
3. 2 x 10^5 free electrons

Correct answer: 4. 8.5 x 10^22 free electrons