KVPY Stream-SA (Class 11) Physics: Questions 112 - 115 of 252

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Question number: 112

» Atoms and Nuclei » Alpha-Particle Scattering Experiment

Appeared in Year: 2014

MCQ▾

Question

In 1911, the physicist Ernest Rutherford discovered that atoms have a tiny, dense nucleus by shooting positively charged particles at a very thin gold foil. A key physical property, which lead Rutherford to use gold that it was.

Choices

Choice (4) Response

a.

Electrically conducting

b.

Shiny

c.

reactive

d.

Highly malleable

Question number: 113

» Ray Optics » Lens Maker's Formula and Lens Formula

Appeared in Year: 2014

MCQ▾

Question

A concave lens made of material of refractive index 1.6 is immersed in a medium of refractive index 2.0. The two surfaces of the concave lens have the same radius of curvature 0.2 m. The lens will behave as a,

Choices

Choice (4) Response

a.

Convergent lens of focal length 0.5 m

b.

Divergent lens of focal length 0.4m

c.

Convergent lens of focal length 0.4 m.

d.

Divergent lens of focal length 0.5 m.

Question number: 114

» Oscillations and Waves » Periodic Functions

MCQ▾

Question

A constant bore U-tube is held vertically containing a liquid column of total length 30 cm. The liquid column is made to perform simple harmonic motion. How much will be the maximum acceleration if the amplitude of motion is 3 cm?

Choices

Choice (4) Response

a.

1.946

b.

1.979

c.

18.57

d.

19.00

Question number: 115

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

A stationary U238 nucleus emits on α-particle (2He4) with velocity 1.2×107msec and kinetic energy 3.8 MeV. What is the velocity of the residual nucleus?

Choices

Choice (4) Response

a.

3.02×105msec

b.

2.05×105msec

c.

2.50×105msec

d.

4.15×105msec

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