Physics Test - ...

The maximum energy in thermal radiation from a source occurs at the wavelength 4000 Å. The effective temperature of the source is (Wien's constant, b = 2.93 × 10⁻³)

In the given figure, if velocity of block \(\mathrm{C}\) at a particular instant is \(-20 \mathrm{m} / \mathrm{s} \hat{\mathrm{j}}\), then velocity of rod (A) at that instant

will be : (string is attached to wedge)

An isosceles prism of angle 120^° has a refractive index 1.44. Two parallel monochromatic rays enter the prism parallel to each other in air as shown. The rays emerge from the opposite faces

A waveform shown when applied to the following circuit will produce which of the following output waveform. Assuming ideal diode configuration and R₁=R₂

A wavefront is represented by the plane y=3−x. The propagation of wave takes place at

The ratio of the velocity of sound in hydrogen (γ=7 / 5) to that helium (γ=5 / 3) at the same temperature is

A flywheel rotates about a fixed axis and slows down from 300 rpm to 100 rpm in 2 min. Then its angular retardation in rad/min² is

Two springs of force constants K₁ and K₂ are connected to a mass mm as shown. The frequency of oscillation of the mass is f. If both K₁ and K₂ are made four times their original values, the frequency of oscillation becomes?

In a wave motion y= a sin(kx−ωt), y can represent