Current Electricity MCQ Level - 3

Question 1

The resistance of platinium wire at 0°C is 4Ω What will be the resistance of the wire at 100°C. If the temperature coefficient of resistance of platinium is 0.0038/°C

Accepted Answer

5.52&Omega;

Answer

6.62&Omega;

Answer

4.54&Omega;

Answer

8.46&Omega;

Question 2

Two metal ball of the same radius a are located in homogeneous poorly conducting medium with resistivity ρ.The resistance of the medium between the ball provided that the separation between them is much greater than the radius of the ball.

Accepted Answer

Answer

Answer

Answer

Question 3

In case of insulator as the temperature decrease resistivity

Accepted Answer

Increases

Answer

become zero

Answer

remains constant

Answer

decreases

Question 4

The law of refraction of direct current lines at the boundary between two conducting media having σ₁ and σ₂ are the conductivity of media 1 and 2 and α₁ and α₂ are the angle between the current lines and normal of the boundary surface as shown in figure.

Accepted Answer

Answer

Answer

Answer

Question 5

A metal ball of radius a is surrounded by a thin concentric metal shell of radius b. The space between these electrodes is filled up with a poorly conducting homogeneous medium of resistivity ρ. The resistance of the interelectrode gap. assume b → ∞

Accepted Answer

Answer

Answer

Answer

Question 6

A long cylinder with uniformly charged surface an cross-section radius a moves with a constant velocity v along its axis. An electric field strength at the surface of the cylinder is equal to E. So current caused by mechanical transfer of a charge.

Accepted Answer

Answer

Answer

Answer

None of these

Question 7

What is the drift velocity of an electron in a copper conductor having area 10 × 10^–6 m² and 10 × 10²⁸ electron/m³

Accepted Answer

1.25 × 10^–5 m/s

Answer

25 × 10^–5 m/s

Answer

1.25 × 10⁺⁵ m/s

Answer

25 m/s

Question 8

Two cylindrical conductor with equal cross-sections and different resistivity ρ₁ and ρ2 are put end to end. The charge at the boundary of the conductor if a current I flows from conductor 1 to conductor 2

Accepted Answer

Answer

Answer

Answer

Question 9

A current of 1A flows through a copper wire. How many electron pass through any cross-section of the wire in 1.6 seconds. (Charge on electron in 1.6 × 10^–19C)

Accepted Answer

1019

Answer

1020

Answer

1021

Answer

1022

Question 10

A battery of 6 cells, each of emf 2V and internal resistance 0.5Ω is being charged by a 220V supplying an external resistance of 10Ω is series. The potential difference across the battery is :

Accepted Answer

60 V

Answer

120 V

Answer

90 V

Answer

180 V

Current Electricity MCQ Level - 3 Physics MCQs & solutions - Free

MCQ Practice Test & Solutions: Current Electricity MCQ Level - 3 (10 Questions)

The resistance of platinium wire at 0°C is 4Ω What will be the resistance of the wire at 100°C. If the temperature coefficient of resistance of platinium is 0.0038/°C

Two metal ball of the same radius a are located in homogeneous poorly conducting medium with resistivity ρ.The resistance of the medium between the ball provided that the separation between them is much greater than the radius of the ball.

In case of insulator as the temperature decrease resistivity

The law of refraction of direct current lines at the boundary between two conducting media having σ₁ and σ₂ are the conductivity of media 1 and 2 and α₁ and α₂ are the angle between the current lines and normal of the boundary surface as shown in figure.

A metal ball of radius a is surrounded by a thin concentric metal shell of radius b. The space between these electrodes is filled up with a poorly conducting homogeneous medium of resistivity ρ. The resistance of the interelectrode gap. assume b → ∞

A long cylinder with uniformly charged surface an cross-section radius a moves with a constant velocity v along its axis. An electric field strength at the surface of the cylinder is equal to E. So current caused by mechanical transfer of a charge.

What is the drift velocity of an electron in a copper conductor having area 10 × 10^–6 m² and 10 × 10²⁸ electron/m³

Two cylindrical conductor with equal cross-sections and different resistivity ρ₁ and ρ2 are put end to end. The charge at the boundary of the conductor if a current I flows from conductor 1 to conductor 2

A current of 1A flows through a copper wire. How many electron pass through any cross-section of the wire in 1.6 seconds. (Charge on electron in 1.6 × 10^–19C)

A battery of 6 cells, each of emf 2V and internal resistance 0.5Ω is being charged by a 220V supplying an external resistance of 10Ω is series. The potential difference across the battery is :

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Current Electricity MCQ Level - 3 Physics MCQs & solutions - Free

MCQ Practice Test & Solutions: Current Electricity MCQ Level - 3 (10 Questions)

The resistance of platinium wire at 0°C is 4Ω What will be the resistance of the wire at 100°C. If the temperature coefficient of resistance of platinium is 0.0038/°C

Two metal ball of the same radius a are located in homogeneous poorly conducting medium with resistivity ρ.The resistance of the medium between the ball provided that the separation between them is much greater than the radius of the ball.

In case of insulator as the temperature decrease resistivity

The law of refraction of direct current lines at the boundary between two conducting media having σ1 and σ2 are the conductivity of media 1 and 2 and α1 and α2 are the angle between the current lines and normal of the boundary surface as shown in figure.

A metal ball of radius a is surrounded by a thin concentric metal shell of radius b. The space between these electrodes is filled up with a poorly conducting homogeneous medium of resistivity ρ. The resistance of the interelectrode gap. assume b → ∞

A long cylinder with uniformly charged surface an cross-section radius a moves with a constant velocity v along its axis. An electric field strength at the surface of the cylinder is equal to E. So current caused by mechanical transfer of a charge.

What is the drift velocity of an electron in a copper conductor having area 10 × 10–6 m2 and 10 × 1028 electron/m3

Two cylindrical conductor with equal cross-sections and different resistivity ρ1 and ρ2 are put end to end. The charge at the boundary of the conductor if a current I flows from conductor 1 to conductor 2

A current of 1A flows through a copper wire. How many electron pass through any cross-section of the wire in 1.6 seconds. (Charge on electron in 1.6 × 10–19C)

A battery of 6 cells, each of emf 2V and internal resistance 0.5Ω is being charged by a 220V supplying an external resistance of 10Ω is series. The potential difference across the battery is :

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The law of refraction of direct current lines at the boundary between two conducting media having σ₁ and σ₂ are the conductivity of media 1 and 2 and α₁ and α₂ are the angle between the current lines and normal of the boundary surface as shown in figure.

What is the drift velocity of an electron in a copper conductor having area 10 × 10^–6 m² and 10 × 10²⁸ electron/m³

Two cylindrical conductor with equal cross-sections and different resistivity ρ₁ and ρ2 are put end to end. The charge at the boundary of the conductor if a current I flows from conductor 1 to conductor 2

A current of 1A flows through a copper wire. How many electron pass through any cross-section of the wire in 1.6 seconds. (Charge on electron in 1.6 × 10^–19C)