HSC Science (Electronics) ११ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Physics

Answer briefly.

Wave motion is doubly periodic. Explain.

Answer briefly.

Define amplitude.

Answer briefly.

Define wavelength of a wave.

Answer briefly.

Draw a wave and indicate points which are

1. in phase
2. out of phase
3. have a phase difference of `pi/2`

Define the relation between velocity, wavelength, and frequency of the wave.

Answer briefly.

Explain what is meant by phase of a wave.

Define progressive wave.

State any four properties of progressive wave.

Solve the following problem.

A certain sound wave in air has a speed 340 m/s and wavelength 1.7 m for this wave, calculate 

1. the frequency
2. the period

Solve the following problem.

A tuning fork of frequency 170 Hz produces sound waves of wavelength 2 m. Calculate the speed of sound.

Sound wave A has period 0.015 s, sound wave B has a period of 0.025 s. Which sound has greater frequency?

Choose the correct option.

Let r be the distance of a point on the axis of a bar magnet from its center. The magnetic field at r is always proportional to

Choose the correct option.

A magnetic needle kept nonparallel to the magnetic field in a nonuniform magnetic field experiences

Answer the following question in brief.

What is the unit of Magnetic Intensity?

Answer the following question in detail.

Draw a diagram to illustrate the magnetic lines of force between the south poles of two such magnets.

Choose the correct option.

The direction of the EM wave is given by

Answer briefly.

State two characteristics of an EM wave.

Solve the numerical problem.

The amplitude of the magnetic field part of a harmonic EM wave in a vacuum is B₀ = 5 × 10⁻⁷ T. What is the amplitude of the electric field part of the wave?

Choose the correct option.

The energy levels of holes are:

Answer the following question.

Which element would you use as an impurity to make germanium an n-type semiconductor?