KVPY Stream-SA (Class 11) Physics: Questions 220 - 225 of 252

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 252 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

Question number: 220

» Atoms and Nuclei » Radioactivity

MCQ▾

Question

The activity of a radioactive sample reduces to Equation of its original value in 4 hours. What will be its activity in 8 hours?

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 221

» Wave Optics » Interference

MCQ▾

Question

The intensity ratio of two interfering beams of light is 9. The value of Equation is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 222

» Properties of Solids & Liquids » Specific Heat Capacity

MCQ▾

Question

What is the meaning of Heat capacity of a substance is infinite?

Choices

Choice (4) Response

a.

No change in temperature whether heat is taken in or given out

b.

Heat is taken in

c.

Heat is given out

d.

All of the above

Question number: 223

» Electrostatics » Coulomb's Law

MCQ▾

Question

The excess (equal in number) of electrons that must be placed on each of two small sphered 4.8 cm apart with force of repulsion between sphere to be 1.6 ⨯ 10-20 N, is –

Choices

Choice (4) Response

a.

400

b.

350

c.

275

d.

250

Question number: 224

» Ray Optics » Power of a Lens

MCQ▾

Question

A convex lens of focal length 39 cm and a concave lens of focal length 20 cm are placed in close contact with one another. The power of the combination is –

Choices

Choice (4) Response

a.

0.41 D

b.

-2.43 D

c.

2.43 D

d.

-0.41 D

Question number: 225

» Kinetic Theory of Gases » Degrees of Freedom

MCQ▾

Question

The speed of the sound in a gas at S. T. P. is 337 ms-1 and the density of the gas is Equation . The number of degree of freedom of a molecule of the gas is –

Choices

Choice (4) Response

a.

424

b.

200

c.

375

d.

100

f Page
Sign In