MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions for Physics

The rate of change of magnetic flux density through a circular coil of area 10^-2 m² and number of turns 200 is 10³ Wb/m² s. The value of induced e.m.f. will be ____________.

The equation of a wave of amplitude 0.02 m and period 0.04 s travelling along a stretched string with a velocity of 25 m/s will be ____________.

A car moves at a speed of 36 km hr^-1 on a level road. The coefficient of friction between the tyres and the road is 0.8. The car negotiates a curve of radius R. If g = 10 ms^-2 , then the car will skid (or slip) while negotiating the curve, if the value of R is ____________.

Which one of the following proportionality represents the relation between orbital magnetic moment M₀ and orbital angular momentum L₀ of an electron?

Metal rings 'P' and 'Q' are lying in the same plane where current 'I' is increasing steadily. The induced current in metal rings is shown correctly in figure.

The r.m.s. value of induced voltage in a coil of 25 turns each of area 30 sq. cm. rotating at 2000 r.p.m. about an axis at right angles to magnetic field is (B = 5 x 10^-4 Wb/m²) ____________.

A magnetic field of 2 x 10^-2 T acts at right angles to a coil of area 50 cm² with 100 turns. The average e.m.f. induced in the coil is 0.2 V, when it is removed from the field in time t. The value of t is ____________.

The electric potential V at any point O (x, y, z all in metres) in space is given by V = 4x² volt. The electric field at the point (1 m, 0, 2m) in volt/metre is ____________.

Two identical circular loops of metal wire are lying on a table without touching each other. Loop-A carries a current which increases with time. ln response, the loop-B ____________.

For a particle executing simple harmonic motion, which of the following statements is NOT correct?

For a radiation of 9 GHz passing through air. The number of waves passing through 1 m length is ____________.

A planet is revolving around the sun in an elliptical orbit as shown in figure. At which point will its K.E. be maximum?

A simple pendulum performs simple harmonic motion about x = 0 with an amplitude A and time period T. The speed of the pendulum at x =A/2 will be ____________.

The velocities of a particle performing linear S.H.M are 0.13 m/s and 0.12 m/s, when it is at 0.12 m and 0.13 m from the mean position respectively. If the body starts from mean position, the equation of motion is ____________.

The mass and radius of earth is 'M_e' and 'R_e' respectively and that of moon is 'M_m' and 'R_m' respectively. The distance between the centre of the earth and that of moon is 'D'. The minimum speed required for a body (mass 'm') to project from a point midway between their centres to escape to infinity is ______.

Electrical conductivity of insulators is ______.

At absolute zero temperature, pure silicon behaves as ______.

A body of mass 10 kg is attached to a wire 0.3 m long. Its breaking stress is 4.8 × 10⁷ N/m². The area of cross-section of the wire is 10^-6m². The maximum angular velocity with which it can be rotated 111 a horizontal circle is ______.

In the case of conical pendulum, if T is the tension in the string and θ is the semivertical angle of cone, then the component of tension which balances the centrifugal force in equilibrium position is ______.

A simple harmonic progressive wave is given by Y = Y₀ sin 2π `(nt - x/lambda)`. If the wave velocity is `(1/8)^{th}` of the maximum particle velocity, then the wavelength is ______