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

A distant star emits radiation with maximum intensity at 350 nm. The temperature of the star is ____________.

State Stefan-Boltzmann law.

What is Wien’s law?

What is a black body?

Explain Wien’s law and why our eyes are sensitive only to visible rays?

In the planet Mars, the average temperature is around −53°C and atmospheric pressure is 0.9 kPa. Calculate the number of moles of the molecules in unit volume in the planet Mars? Is this greater than that in earth?

Normal human body of the temperature is 98.6°F. During high fever, if the temperature increases to 104°F, what is the change in peak wavelength that emitted by our body? (Assume human body is a black body)

The average translational kinetic energy of gas molecules depends on ____________.

What is the microscopic origin of temperature?

A student tunes his guitar by striking a 120 Hertz with a tuning fork, and simultaneously plays the 4^th string on his guitar. By keen observation, he hears the amplitude of the combined sound oscillating thrice per second. Which of the following frequencies is the most likely the frequency of the 4th string on his guitar?

Compare the velocities of the wave forms given below, and choose the correct option.

where, v_A, v_B, v_C and v_D are velocities given in (a), (b), (c) and (d), respectively.

The displacement y of a wave travelling in the x direction is given by y = (2 x 10^-3) sin `(300 "t" -  2x  +  pi/4)`, where x and y are measured in metres and t in second. The speed of the wave is:

A uniform rope having mass m hangs vertically from a rigid support. A transverse wave pulse is produced at the lower end. Which of the following plots shows the correct variation of speed v with height h from the lower end?

Show that the velocity of a traveling wave produced in a string is v = `sqrt("T"/mu)`.

Explain in detail the kinetic interpretation of temperature.

Write down the time period of simple pendulum.

What is meant by angular harmonic oscillation? Compute the time period of angular harmonic oscillation.

Write down the difference between simple harmonic motion and angular simple harmonic motion.

Explain the principle of homogeneity of dimensions. What are its uses? Give example.

Identify the unit vector in the following.