Physics Test 21...

If force F is related with distance x and time t as F = A√x + Bt² , the dimensions of A/B is

A bob is hanging over a pulley inside a car through a string. The second end of the string is in the hand of a person standing in the car. The car is moving with constant acceleration aa directed horizontally as shown in the figure. Another end of the string is pulled with constant acceleration a vertically. The tension in the string is equal to :

A disc of mass M and radius R is rolling with angular speed ω on a horizontal plane as shown. The magnitude of angular momentum of the disc about the origin O is

The magnitude of the maximum acceleration is π times that of the maximum velocity of a simple harmonic oscillator. The time period of the oscillator in seconds is

An object of specific gravity ρ is hung from a thin steel wire. The fundamental frequency for transverse standing waves in the wire is 300 Hz. The object is immersed in water, so that one half of its volume is submerged. The new fundamental frequency (in Hz) is

One mole of ideal gas goes through process  then change in temperature of the gas when volume changes from V = 1 m³ to 2 m³ is:

A very long straight wire carries a current I. At the instant when a charge +Q at point P has velocity  as shown, the force on the charge is

The ratio of the volume occupied by an atom to the volume of the nucleus is

Energy from the sun falls on the earth at a rate of 1353 W/m², which is known as solar constant, i.e., the power incident per unit area per second at the top of atmosphere. Find the r.m.s values of the electric and magnetic fields in the sunlight reaching the top of the atmosphere.

The effect on the interference fringes if the monochromatic source is replaced by a source of white light would be: