AIIMS Physics: Questions 431 - 434 of 500

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Question number: 431

» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation

Appeared in Year: 1993

MCQ▾

Question

The wavelength of a 1KeV photon is 1.24×109m . What is the frequency of 1MeV photon: [AIPMT]

Choices

Choice (4) Response

a.

2.4×1023Hz

b.

1.24×1015Hz

c.

2.4×1020Hz

d.

1.24×1018Hz

Question number: 432

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

MCQ▾

Question

A charge with 2×1011C and 4×107kg mass moving with a velocity of 0.5×108ms along x axis. A uniform static magnetic field of 0.7T is acting along the y – axis. The magnetic force (magnitude and direction) on charge –

Choices

Choice (4) Response

a.

7×104N,alongxaxis

b.

7×104N,alongyaxis

c.

7×104N,alongzaxis

d.

Zero

Question number: 433

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

Appeared in Year: 2006

MCQ▾

Question

A coil of inductive reactance 31Ω has a resistance of 8Ω . It is placed in series with a condenser of capacitative reactance 25Ω . The combination is connected to an a. c. source of 110 volt. The power factor of the circuit is – (AIPMT)

Choices

Choice (4) Response

a.

0.56

b.

0.80

c.

0.64

d.

0.33

Question number: 434

» Wave Optics » Interference

MCQ▾

Question

In an interference experiment, forth bright fringe is obtained at a point on the screen with a light of 680 nm. What should be the wavelength of the light in order to obtain 6th bright fringe at the same point?

Choices

Choice (4) Response

a.

760 nm

b.

453.3 nm

c.

630 nm

d.

549.4 nm

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