AIIMS Physics: Questions 477 - 480 of 500

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Question number: 477

» Electrostatics » Forces Between Two Point Charges

Appeared in Year: 2004

MCQ▾

Question

A charged oil drop is suspended in a uniform field of 3×104Vm so that it neither falls nor rises. The charge on the drop will be –

(Take the mass of the charge =9.9×1015kg and g=10ms2 ) (AIEEE)

Choices

Choice (4) Response

a.

4.8×1018C

b.

1.6×1018C

c.

3.2×1018C

d.

3.3×1018C

Question number: 478

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

Appeared in Year: 1987

MCQ▾

Question

In a LCR series circuit, R=10Ω , χL=8Ω and χC=6Ω the total impedance of the circuit is: [RPET]

Choices

Choice (4) Response

a.

10Ω

b.

17.2Ω

c.

10.2Ω

d.

All of the above

Question number: 479

» Magnetic Effects of Current and Magnetism » Ampere's Law

MCQ▾

Question

A current of 3A flows through two long parallel wires. The magnetic force on each wire is 1×103Nm. If their currents makes doubled and separation between them makes 14th of initial value then magnetic force per unit length of each wire becomes –

Choices

Choice (4) Response

a.

16×103Nm

b.

8×103Nm

c.

32×103Nm

d.

4×103Nm

Question number: 480

» Current Electricity » Electric Current

MCQ▾

Question

The current through a wire depends on time as I=(5+8t+3t2)A . Calculate the charge crossed through a cross section of the wire in 4s .

Choices

Choice (4) Response

a.

112C

b.

148C

c.

73C

d.

176C

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