Current Electricity-Electric Current (AIIMS Physics): Questions 1 - 3 of 5

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Question number: 1

» Current Electricity » Electric Current

MCQ▾

Question

An electric charge in uniform motion produces:

Choices

Choice (4) Response
a.

Magnetic field only

b.

Electric and magnetic field

c.

Electric field only

d.

Neither electric nor magnetic

Question number: 2

» Current Electricity » Electric Current

Appeared in Year: 2004

MCQ▾

Question

Eels are able to generate current with biological cells called electro plaques. The electro plaques in an Eel are arranged in 100 rows, each row stretching horizontally along the body of the fish containing 5000 electro plaques. The arrangement is suggestively shown below. Each electro plaques have an emf of 0.15 V and internal resistance of 0.25 Ω. The water surrounding the Eel completes a circuit between the head and its tail. If the water surrounding it has a resistance of 500 Ω, the current an Eel can produce in water is about: - [AIIMS]

A circuit diagram with biological cell

A Circuit Diagram With Biological Cell

Figure shows a circuit diagram to generate current with biological cells called electro plaques. The electro plaques are arranged in 100 rows, each row stretching horizontally along the body of fish containing 5000 electro plaques.

Choices

Choice (4) Response
a.

15 A

b.

1.5 A

c.

30 A

d.

3.0 A

Question number: 3

» Current Electricity » Electric Current

MCQ▾

Question

A current of 1.34A exists in a copper wire of cross - section 1.0mm2 . Assuming each copper atom contributes one free electron. Calculate the drift speed of the free electrons in the wire. The density of copper is 8990kgm3 and atomic mass =63.50 .

Choices

Choice (4) Response
a.

2×104ms

b.

104ms

c.

105ms

d.

2×105ms

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