Physics Test - 12

A man is standing on the platform. One train is approaching and another train is going away with speed of 4 m/s, frequency of sound produced by train is 240 Hz. What will be the number of beats heard by him per second?

Five particles of mass 2 kg are attached to the rim of a circular disc of radius 0.1 m and a negligible mass. Moment of inertia of the system about the axis passing through the centre of the disc, perpendicular to its plane is

A frog can be levitated in magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as a/an _______ substance.

The values of the horizontal component of Earth's magnetic field and angle of dip are 1.8 × 10−5Wb/m2and 30o, respectively, at some place. The total intensity of Earth's magnetic field at that place will b

A mass M is hung with a light spring. If the extra mass m is also hung with spring, the spring is stretched by x cm. Then, the time period of including mass will be

Two masses m₁ and m₂ are suspended together by a mass-less spring of spring constant K. When the masses are in equilibrium, m₁ is removed without disturbing the system.The angular frequency and amplitude of oscillation of m₂ are

A point mass 'm' is suspended at the end of a mass less wire of length 'L' and cross-section 'A'. If 'Y' is the Young's modulus for the wire, the frequency of oscillations for the SHM along the vertical line is

Two pendulums oscillate with the same amplitude but with a constant phase difference of 90×. If the maximum velocity of one is v, the maximum velocity of the other will be

The spring constants of 3 springs connected to a mass are shown in the figure. When the mass oscillates, what is the time period of the oscillations?

Let there be four articles having colours blue, red, black and white. When they are heated together and allowed to cool, which article will cool at the earliest?