Resistivity

Q.

Define in detail good conductor and bad conductor of electricity

Q.

Long and thin wires will have ___ resistance compared to short and thick wires.

Q.

V=IR then, R=V/I.if we change the value of I and V is there any affect on R

Q. What is the relation between Conductivity and Conductance ?

Q. What is the factor that affects the specific resistance of a substance?

1. Mass
2. Temperature
3. Density
4. Resistance

Q. What is the factor that affects the specific resistance of a substance?

1. Mass
2. Temperature
3. Density
4. Resistance

Q. At constant voltage, if the resistance of a substance is decreased, the current through it will:

1. Increase
2. Decrease
3. Remain same
4. Become zero

Q. At constant voltage, if the resistance of a substance is decreased, the current through it will:

1. Increase
2. Decrease
3. Remain same
4. Become zero

Q.

The unit of resistivity is:

1. Ω

2. Ω / m

3. Ω-m

4. mho

Q.

Resistivity of a wire depends upon:

1. Length of the wire

2. Temperature

3. It is constant for a given material

4. Area of cross section