AIIMS (All India Institute of Medical Sciences) Physics: Questions 253 - 258 of 500

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Question number: 253

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

MCQ▾

Question

Magnetic permeability is minimum for –

Choices

Choice (4) Response

a.

Diamagnetic substance

b.

Ferromagnetic substance

c.

Paramagnetic substance

d.

None of the above

Question number: 254

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

Force between two identical bar magnets whose centers are Equation meter apart is 5.4 N when their axes are in same line. If separation is increased to Equation , the force between them is reduced to:

Choices

Choice (4) Response

a.

0.3 N

b.

2.4 N

c.

1.2 N

d.

0.6 N

Question number: 255

» Atoms and Nuclei » Radioactive Decay Law

MCQ▾

Question

A radioactive material has a half – life of 8 days. What fraction of the material would remain after 48 days –

Choices

Choice (4) Response

a.

0.156

b.

0.0625

c.

0.625

d.

0.0156

Question number: 256

» Laws of Motion » Centripetal Force

MCQ▾

Question

A body of mass 7 kg is moving in a circle of diameter 2 m with an angular velocity of Equation . The centripetal force is –

Choices

Choice (4) Response

a.

350 N

b.

75 N

c.

175 N

d.

100 N

Question number: 257

» Oscillations and Waves » Wave Motion

Appeared in Year: 2000

Assertion-Reason▾

Assertion (Ꭺ)

Like sound, light cannot propagate in vacuum.

Reason (Ꭱ)

Sound is a square wave. It propagates in a medium by virtue of damping oscillation.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

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

c.

Both Ꭺ and Ꭱ are false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 258

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

A capacitor of capacitance Equation is connected in the tank circuit of an oscillator oscillating with a frequency of 2 kHz. If the current flowing in the circuit is 5 mA, the voltage across the capacitor will be –

Choices

Choice (4) Response

a.

0.133 V

b.

0.165 V

c.

81.5 V

d.

159 V

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