AIIMS Physics: Questions 444 - 447 of 500

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Question number: 444

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Appeared in Year: 1995

MCQ▾

Question

Dimension of a rectangular coil is 20cm×10cm . Number of turns in coil is 60. It is rotating about its one of the diameter in an uniform magnetic field of 0.5T , with the speed 1800 r. p. m. the maximum induced emf is – [RPMT]

Choices

Choice (4) Response

a.

118V

b.

98V

c.

100V

d.

113 V

Question number: 445

» Magnetic Effects of Current and Magnetism » Hysteresis

MCQ▾

Question

The mass of a specimen of a ferromagnetic material is 0.6kg and its density is 7.8×103kgm3 . If the area of hysteresis loop of alternating magnetizing field of frequency 50Hz is 0.722MKS units then the hysteresis loss per second will be –

Choices

Choice (4) Response

a.

277.7×105Jsec

b.

277.7×104Jsec

c.

277.7×105Jsec

d.

277.7×103Jsec

Question number: 446

» Dual Nature of Matter and Radiation » De-Broglie Relation

Appeared in Year: 1995

MCQ▾

Question

The accelerating voltage of an electron gun is 50, 000volt . De-Broglie wavelength of the electron will be – [RPMT]

Choices

Choice (4) Response

a.

0.095

b.

0.055

c.

0.077

d.

0.55

Question number: 447

» X - Rays » Moseley's Law

Appeared in Year: 2001

MCQ▾

Question

The inter-planer distance in a crystal is 2.8×108m . The value of maximum wavelength which can be diffracted – [AIPMT]

Choices

Choice (4) Response

a.

1.4×108m

b.

5.6×108m

c.

7.6×108m

d.

2.8×108m

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