AIIMS Physics: Questions 426 - 430 of 500

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Question number: 426

» Oscillations and Waves » Standing Waves in Strings and Organ Pipes

MCQ▾

Question

A string in a musical instrument is 60 cm long and its fundamental frequency is 800 Hz. If a frequency of 1200 Hz is to be produced, then required length of string is –

Choices

Choice (4) Response

a.

40 cm

b.

50 cm

c.

65 cm

d.

70 cm

Question number: 427

» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field

MCQ▾

Question

Which of the following cannot be deflected by magnetic field?

Choices

Choice (4) Response

a.

Cosmicrays

b.

γrays

c.

βrays

d.

αrays

Question number: 428

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 1999

MCQ▾

Question

Light of wavelength 3000 in Photoelectric effect gives electron of maximum Kinetic Energy 0.5eV . If wavelength change to 2000 then maximum kinetic energy of emitted electrons will be – [AIPMT]

Choices

Choice (4) Response

a.

Greater than 0.5 eV

b.

Less than 0.5 eV

c.

Photoelectric effect does not occurs

d.

0.5 eV

Question number: 429

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

If P×Q =3 PQ , then find the angle between P and Q.

Choices

Choice (4) Response

a.

600

b.

900

c.

450

d.

300

Question number: 430

» Atoms and Nuclei » Half Life and Mean Life

Appeared in Year: 1998

MCQ▾

Question

Half – life period of two radioactive substance are are 40 minute and 20 minute respectively, then after 80 minute ratio of the remaining nuclei will be – (Initially both have equal active nuclei) [AIPMT]

Choices

Choice (4) Response

a.

16: 1

b.

4: 1

c.

1: 2

d.

8: 1

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