HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Physics

The power factor of LCR circuit is ______.

A particle executes S.H.M. of amplitude 3 cm. Its acceleration at extreme position is 27 cm/s² Calculate its angular velocity.

Chalk particles cling to the black board due to ______.

The effective capacitor between A and B in the following circuit is ______.

Explain the theory of an AC circuit with a resistor. 

The power factor for a choke coil is ______.

Where is the power dissipated in an alternating current circuit?

Explain the term choke coil.

Obtain an expression for Energy Density of a magnetic field.

A spring breaks under tension of 10 kg wt.If the string is used to revolve a body of mass 1.2 kg in a horizontal circle. of radius 50 cm, what is the maximum speed with which a body can be revolved?

The dimensional formula of surface tension is ______.

Two tuning forks having frequencies 320 Hz and 340 Hz are sounded together to produce sound waves. The velocity of sound in air is 340 m/s. Find the difference in wavelength of these waves. 

The fundamental frequency of an air column in a pipe closed at one end is in unison with the third overtone of an open pipe. Calculate the ratio of lengths of their air columns

The co-efficient of mutual induction between primary and secondary coil is 2H. Calculate induced e.m.f. if current of 4A is cut off in 2.5 x 10^-4 seconds

What is mass defect?

In a set, 21 turning forks are arranged in a series of decreasing frequencies. Each tuning fork produces 4 beats per second with the preceding fork. If the first fork is an octave of the last fork, find the frequencies of the first and tenth fork.

If the radius of a sphere is doubled without changing the charge on it, then electric flux originating from the sphere is ______.

The value of end correction for an open organ pipe of radius 'r' is .........................

A) 0.3 r

B) 0.6 r

C) 0.9 r

D) 1.2 r

Derive the relation between surface tension and surface energy per unit area.

With a neat labelled diagram, show that all harmonics are present in an air column contained in a pipe open at both the ends. Define end correction.