AIIMS (All India Institute of Medical Sciences) Physics: Questions 400 - 404 of 500

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Question number: 400

» Magnetic Effects of Current and Magnetism » Cyclotron

MCQ▾

Question

The cyclotron frequency of an electron gyrating in a magnetic field of 5 T is approximately –

Choices

Choice (4) Response

a.

280 GHz

b.

140 GHz

c.

28 Hz

d.

160 MHz

Question number: 401

» Electronic Devices » Junction Transistor

MCQ▾

Question

Consider an N – P – N transistor amplifier in common-emitter configuration. The current gain of the transistor is 90. If the collector current changes by 2 mA, what will be the change in emitter current –

Choices

Choice (4) Response

a.

1.01mA

b.

2.2 mA

c.

2.02 mA

d.

0.2 mA

Question number: 402

» Wave Optics » Young's Double Slit Experiment

MCQ▾

Question

A double slit experiment is performed with light of wavelength 700 nm. A thin film of thickness Equation and refractive index 1.5 is introduced in the path of the upper beam. The location of the central maximum will –

Choices

Choice (4) Response

a.

Shift upward by five fringes

b.

Shift downward by 10 fringes

c.

Remain upshifted

d.

Shift upward by seven fringes

Question number: 403

» Electronic Devices » Semiconductor Diode

Appeared in Year: 2004

MCQ▾

Question

A Ge specimen is doped with Al. The concentration of acceptor atoms Equation Given that the intrinsic concentration of electron – hole pairs is Equation , the concentration of electrons in the specimen is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 404

» Kinematics » Projectile Motion

MCQ▾

Question

The velocity of projection of a body is given by Equation . The ratio of horizontal range to maximum height is

Choices

Choice (4) Response

a.

3

b.

2

c.

6

d.

4

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