HSC Science (Electronics) 11th Standard - Maharashtra State Board Question Bank Solutions for Physics

What is an elastomer?

Explain how solids are classified on the basis of band theory of solids.

Explain how solids are classified on the basis of the band theory of solids.

Answer in one sentence:

What is an elastomer?

Explain how solids are classified on the basis of band theory of solids.

Explain how solids are classified on the basis of band theory of solids.

Explain how solids are classified on the basis of band theory of solids.

Explain how solids are classified on the basis of band theory of solids.

Explain how solids are classified on the basis of band theory of solids.

Explain how solids are classified on the basis of band theory of solids.

Answer the following question.

In real life, objects never travel with uniform velocity, even on a horizontal surface, unless something is done? Why is it so? What is to be done?

For the study of any kind of motion, we never use Newton’s first law of motion directly. Why should it be studied?

Answer the following question.

You are inside a closed capsule from where you are not able to see anything about the outside world. Suddenly you feel that you are pushed towards your right. Can you explain the possible cause (s)? Is it a feeling or a reality? Give at least one more situation like this.

Solve the following problem.

A truck of mass 5 ton is travelling on a horizontal road with 36 km hr^-1, stops on traveling 1 km after its engine fails suddenly. What fraction of its weight is the frictional force exerted by the road? If we assume that the story repeats for a car of mass 1 ton i.e., car moving at the same speed stops at a similar distance, how much will the fraction be?

DC current flows in a metal piece of the non-uniform cross-section. Which of these quantities remains constant along the conductor: current, current density, or drift speed?

The magnitude of current density in a copper wire is 500 A/cm². If the number of free electrons per cm³ of copper is 8.47 × 10²² calculate the drift velocity of the electrons through the copper wire (charge on an e = 1.6 × 10^-19 C)

Answer in detail.

Distinguish between intrinsic semiconductors and extrinsic semiconductors.

A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wavelength?

Give a reason for the following:

Long-distance radio broadcasts use short-wave bands. Why?

Give a reason for the following:

It is necessary to use satellites for long-distance TV transmission. Why?