Physics

Equation of a standing wave is expressed as y = 2Asinωt coskx. In this equation, quantity w/k represents.

Two infinitely long parallel wires having linear charge densities λ₁ and λ₂ respectively are placed at a distance of R. The force per unit length on either wire will be

Mercury does not wet glass because

When an elevator is moving downward with a increasing speed, the apparent weight of a body inside elevator

A proton and a deuteron enter in a uniform magnetic field with equal kinetic energy in the direction perpendicular to the field. The ratio of radius of circular path is

Avalanche breakdown of p-n junction diode is due to

A particle is moving in a straight line with velocity (v) = (t – 4) m/s. What is the average speed between t = 0 to t = 8 second?

The displacement wave in a string is given as y = 5sin(62.8x – 157t). Here y and x are in cm and t in second. The wavelength of the wave is

A man is swimming with speed 10 km/h in still water crosses a river of width 1 km along the shortest path in 10 minutes. The velocity of river flow is

In an isobaric process, the absolute temperature is doubled. The mean free path (l) and the  relaxation time (t) will become respectively