A metallic resistor is connected across a battery. If the number of collisions of the free electrons with the lattice is somehow decreased in the resistor (for example, by cooling it), the current will:
1. increase
2. decrease
3. remain constant
4. become zero

Two resistors A and B have resistances R_A and R_B respectively with R_A < R_B . The resistivities of their materials are ρ_A and ρ_B

1.   ρ_A > ρ_B 

2.   ρ_A = ρ_B 

3.   ρ_A < ρ_B 

4.   The information is not sufficient to find the relation between ρ_A and ρ_B

The product of resistivity and conductivity of a cylindrical conductor depends on

1.   temperature

2.   material

3.   area of cross-section

4.   none of these.

As the temperature of a metallic resistor is increased, the product of its resistivity and conductivity:

In an electric circuit containing a battery, the charge (assumed positive) inside the battery:

A resistor of resistance \(R\) is connected to an ideal battery. If the value of \(R\) is decreased, the power dissipated in the resistor will:
1. increase.
2. decrease.
3. remain unchanged.
4. Can't be determined.

A current passes through a resistor. Let K₁ and K₂ represent the average kinetic energy of the conduction electrons and the metal ions respectively.

1.   K₁ < K₂

2.   K₁ = K₂

3.   K₁ > K₂

4.   Any of these three may occur

Two resistors \(R\) and \(2R\) are connected in series in an electric circuit. The thermal energy developed in \(R\) and \(2R\) are in the ratio of:
1. \(1:2\)
2. \(2:1\)
3. \(1:4\)
4. \(4:1\)

Two resistances R and 2R are connected in parallel in an electric circuit. The thermal energy developed in R and 2R are in the ratio

1.   1 : 2

2.   2 : 1

3.   1 : 4

4.   4 : 1.

A uniform wire of resistance \(50\) \(\Omega\) is cut into \(5\) equal parts. These parts are now connected in parallel. The equivalent resistance of the combination is:
1. \(2\) \(\Omega\)
2. \(10\) \(\Omega\)
3. \(250\) \(\Omega\)
4. \(6250\) \(\Omega\)