Current Electricity (AIIMS (All India Institute of Medical Sciences) Physics): Questions 6 - 9 of 11

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Question number: 6

» Current Electricity » Electric Cell and Its Internal Resistance

Appeared in Year: 2004

Assertion-Reason▾

Assertion (Ꭺ)

A larger dry cell has higher emf.

Reason (Ꭱ)

The emf of a dry cell is proportional to its size.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Ꭺ is true but Ꭱ is false

Question number: 7

» Current Electricity » Electric Current

MCQ▾

Question

A current of Equation exists in a copper wire of cross - section Equation . Assuming each copper atom contributes one free electron. Calculate the drift speed of the free electrons in the wire. The density of copper is Equation and atomic mass Equation .

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 8

» Current Electricity » Electric Current

MCQ▾

Question

The current through a wire depends on time as Equation . Calculate the charge crossed through a cross section of the wire in Equation .

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 9

» Current Electricity » Electric Current

MCQ▾

Question

The number of electron passing through a heater wire in 30 seconds, if it carries a current of 10 A is approximately –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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