Physics NCERT Exemplar Solutions Class 12th Chapter Eight

A pendulum is suspended by a string of length 250 cm. The mass of the bob of the pendulum is 200g. The bob is pulled aside until the string is at 60° with vertical as shown in the figure. After releasing the bob, the maximum velocity attained by the bob will be_________ ms^-1. (if g = 10m/s²)

The velocity of sound in a gas, in which two wavelengths 4.08m and 4.16m produce 40 beats in 12s, will be:

Match List – I with List – II

Choose the correct answer from the options given below:

Given below are two statements : One is labeled as Assertion A and the other is labeled as Reason R.

Assertion A : n-p-n transistor permits more current that a p-n-p transistor.

Reason R : Electrons have greater mobility as a change carrier.

Choose the correct answer form the options given below:

For using a multimeter to identify diode from electrical compounds, choose the correct statement out of the following about the diode:

In the following circuit, the correct relation between output (Y) and inputs A and B will be:

The Q-value of a nuclear reaction and kinetic energy of the projectile particle, K_p are related as:

THE de Broglie wavelength for an electron and a photon are ${\lambda }_{e}and{\lambda }_p$  respectively. For the same kinetic energy of electron and photon, which of the following presents the correct relation between the de Broglie wavelengths of two

The aperture of the objective is 24.4 cm. The resolving power of this telescope, if a alight of wavelength 2440 $\stackrel{o}{A}$  is used to see the object will be:

The refracting angle of a prims is  A and refractive index of the material of the prism is cot (A/2). Then the angle of minimum deviation will be-