HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

A set of 8 tuning forks is arranged in a series of increasing order of frequencies. Each fork gives 4 beats per second with the next one and the frequency of last fork is twice that of the first. Calculate the frequencies of the first and the last fork.

A device Y is connected across an AC source of emf e = e₀ sin ωt. The current through Y is given as i = i₀ sin (ωt + π/2).

1. Identify the device Y and write the expression for its reactance.
2. Draw graphs showing a variation of emf and current with time over one cycle of AC for Y.
3. How does the reactance of the device Y vary with the frequency of the AC? Show graphically.
4. Draw the phasor diagram for device Y.

What do you understand by the term wave-particle duality? Where does it apply?

Calculate the wavelength associated with an electron, its momentum and speed when it is accelerated through a potential of 54 V.

Calculate the wavelength associated with an electron, its momentum and speed when it is moving with the kinetic energy of 150 eV.

Determine the binding energy per nucleon of the americium isotope \[\ce{_95^244Am}\], given the mass of \[\ce{_95^244Am}\] to be 244.06428 u.

A stone is tied to one end of a string. Holding the other end, the string is whirled in a horizontal plane with progressively increasing speed. It breaks at some speed because ______ 

A 500 kg car takes a round turn of the radius of 50m with a velocity of 36 km/hr. The centripetal force is ______.

A flywheel is revolving with a constant angular velocity. A chip of its rim breaks and flies away. What will be the effect on its angular velocity?

A flywheel of mass 8 kg and radius 10 cm rotating with a uniform angular speed of 5 rad/sec about its axis of rotation, is subjected to an accelerating torque of 0.01 Nm for 10 seconds. Calculate the change in its angular momentum and change in its kinetic energy. 

The molar specific heat of a gas at constant volume is 12307.69 J kg^-1 K^-1. If the ratio of the two specific heats is 1.65, calculate the difference between the two molar specific heats of gas. 

State factors on which the amount of heat radiated by a body depends.

Calculate the ratio of two specific heats of polyatomic gas molecules.  

Derive Mayer’s relation.

Two systems at the same temperature are said to be in ______ 

For work done to be reversible, the process should be ______ 

Heating a gas in a constant volume container is an example of which process?

When two objects are said to be in thermal equilibrium?

What is a thermodynamic process?

Draw a p-V diagram of the reversible process.