Physics Test 67...

A uniform rope of length 10 m and mass 3 kg hangs vertically from a rigid support. A block of mass 1 kg is attached to the free end of the rope. A transverse pulse of wavelength 0.05 m is produced at the lower end of the rope. The wavelength of the pulse when it reaches the top of the rope is:

An ideal monoatomic gas is taken around the cycle ABCDA as shown in the P-V diagram. The work done during the cycle is:

A thin equiconvex lens of glass of refractive index μ₂=1.5 separates two media of refractive indices μ₁=1.4 and μ₃=1.6, as shown in the figure:

"Good emitters are good absorbers" is a statement concluded from:

A machine gun fires a bullet of mass 40 g with a velocity 1200 ms⁻¹. The man holding it can exert a maximum force of 144N on the gun. How many bullets can he fire per second at the most?

Find the minimum attainable pressure of an ideal gas in process T=T0+αV², where T₀ and α are positive constants and V is the volume of one mole of gas assuming d²P / dT²=+ve.

According to Maxwell's hypothesis, changing electric field gives rise to:

An unpolarised beam of intensity I₀ is incident on a pair of nicol prisms making an angle of 60^∘ with each other. The intensity of light emerging from the pair is:

The engine of a car produces an acceleration of 6 ms⁻² in the car. If this car pulls another car of the same mass, then the acceleration would be:

If w₁,w₂ and w₃ represent the work done in moving a particle from A to B along three different paths 1,2 and 3 respectively(as shown)in the gravitational field of a point mass m. Find the correct relation between w1,w₂ and w₃.