KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 87 - 89 of 268

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Question number: 87

» Electromagnetic Induction & Alternating Currents » Lenz's Law

Appeared in Year: 2014

MCQ▾

Question

Two identical metallic square loops L1 and L2 are placed next to each other with their sides parallel on a smooth horizontal table. Loop L1 is fixed and a current which increases as a function of time is passed through it. Then loop L2

Choices

Choice (4) Response

a.

Remains stationary

b.

Moves towards L1

c.

Rotates about its center of mass

d.

Moves away from L1

Question number: 88

» Ray Optics » Snell's Law

Appeared in Year: 2012

MCQ▾

Question

On a bright sunny day a diver with height h stands at the bottom of a lake of depth H. Looking upward, he can see objects outside the lake in a circular region of radius r. Beyond this circle he sees the images of objects lying on the floor of the lake. If refractive index of water is 43 , then the value of r is,

Choices

Choice (4) Response

a.

3h7

b.

Hh73

c.

3(Hh)7

d.

(Hh)53

Question number: 89

» Oscillations and Waves » Longitudinal and Transverse Waves

Appeared in Year: 2013

MCQ▾

Question

The figure below shows pressure variation in two different sound waves in air with time at a given position. Both the figures are drawn to the same scale.

Two waves with different wavelengths and amplitudes

Two Waves With Different Wavelengths and Amplitudes

In figure two waves with different wavelengths and different amplitude is shown.

Which of the following statements is true?

Choices

Choice (4) Response

a.

Wave 1 has higher frequency and greater amplitude compared to wave 2

b.

Wave 1 has lower frequency and smaller amplitude compared to wave 2

c.

Wave 1 has shorter wavelength and greater amplitude compared to wave 2

d.

Wave 1 has shorter wavelength and smaller amplitude compared to wave 2

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