HSC Science इयत्ता ११ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Physics

What is meant by a reversible and irreversible processes?

Can the given heat energy be completely converted to work in a cyclic process? If not, when can the heat can completely converted to work?

Explain in detail the isothermal process.

Derive the work done in an isothermal process.

Explain in detail an adiabatic process.

Derive the work done in an adiabatic process.

Explain the isobaric process and derive the work done in this process.

Explain in detail the isochoric process.

What are the limitations of the first law of thermodynamics?

Draw the TP diagram (P-x axis, T-y axis), VT(T-x axis, V-y axis) diagram for

1. Isochoric process
2. Isothermal process
3. Isobaric process

In an adiabatic expansion of the air, the volume is increased by 4%, what is the percentage change in pressure? (For air γ = 1.4)

In a petrol engine, (internal combustion engine) air at atmospheric pressure and temperature of 20°C is compressed in the cylinder by the piston to `1/8` of its original volume. Calculate the temperature of the compressed air. (For air γ = 1.4)

Consider the following cyclic process consist of isotherm, isochoric and isobar which is given in the figure.

Draw the same cyclic process qualitatively in the V-T diagram where T is taken along the x-direction and V is taken along the y-direction. Analyze the nature of heat exchange in each process.

An ideal gas is taken in a cyclic process as shown in the figure. Calculate

1. work done by the gas
2. work done on the gas
3. Net work done in the process

For a given ideal gas 6 × 10⁵ J heat energy is supplied and the volume of gas is increased from 4 m³ to 6 m³ at atmospheric pressure. Calculate

1. the work done by the gas
2. change in internal energy of the gas
3. graph this process in PV and TV diagram

For a particular tube, among six harmonic frequencies below 1000 Hz, only four harmonic frequencies are given: 300 Hz, 600 Hz, 750 Hz and 900 Hz. What are the two other frequencies missing from this list?

Let y = `1/(1 + x^2)` at  t = 0 be the amplitude of the wave propagating in the positive x-direction. At t = 2s, the amplitude of the wave propagating becomes y = `1/(1 + (x - 2)^2)`. Assume that the shape of the wave does not
change during propagation. The velocity of the wave is:

What is a stationary wave?

Explain the formation of stationary waves.

Write the characteristics of stationary waves.