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

In the network shown cell E has internal resistance r and the galvanometer shows zero deflection. If the cell is replaced by a new cell of emf 2E and internal resistance 3r keeping everything else identical, then ______.

A small loop of area of cross-section 10^-6 m² is lying concentrically and coplanar inside a bigger loop of radius 0.628 m. A current of 20 A is passed in the bigger loop. The smaller loop is rotated about its diameter with an angular velocity `omega`. The magnetic flux linked with the smaller loop will be ____________.

A block of mass m, lying on a smooth horizontal surface, is attached to a spring (of negligible mass) of spring constant k. The other end of the spring is fixed, as shown in the figure. The block is initially at rest in its equilibrium position. If now the block is pulled with a constant force F, the maximum speed of the block is: ____________.

For the weight of body of mass 5 kg to be zero on equator of the earth, angular velocity of the earth must be (The radius of earth = 6400 km, acceleration due to gravity = 10 m/s²).

A rectangular loop of area 0.4 m² is lying in a magnetic field of 4 x 10^-2 tesla at an angle of 60° with the magnetic field. The magnetic flux passing through this loop will be ______.

In case of npn transistors, the collector current is always less than the emitter current because ______.

A resistance of 5 `Omega` is connected in the left gap of a metre bridge and 15 `Omega` in the other gap. The position of the balancing point is ____________.

In energy band diagram of insulators, a band gap and the conduction band is respectively.

In following figure, a current of 1.4 A flows towards the bridge circuit. The current in 2 n resistor is ______.

When the kinetic energy of an electron is increased, the wavelength of the associated wave will ______.

A rod of length 'L' is hung from its one end and a mass 'm' is attached to its free end. What tangential velocity must be imparted to 'm'. so that it reaches the top of the vertical circle? (g = acceleration due to gravity)

When a ray of light enters a medium of refractive index µ, then it is observed that the angle of refraction is half the angle of incidence. The value of angle of incidence will be ____________.

The force of gravitation between two bodies of mass 1 kg each separated by a distance of 1 m in vacuum is ____________.

In an npn transistor circuit, the collector current is 10 mA. If 90% of the electrons emitted reach the collector, the emitter current (I_E) and base current (I_B) are given by ____________.

A ferris wheel with radius 20 m makes 1 revolution in every 10 s. The force exerted by the passenger of weight 55 kg on the seat, when he is at the top of the ferris wheel, is ____________.

SI Unit of Magnetization is ____________.

A body of mass m performs linear S.H.M. given by equation, x = P sin cot + Q sin`(omega"t" + pi/2)`. The total energy of the particle at any instant is ______.

Two parallel wires of equal lengths are separated by a distance of 3m from each other. The currents flowing through first and second wire is 3A and 4.5A respectively in opposite directions. The resultant magnetic field at the mid-point of both wire is (µ₀ = permeability of free space).

A cylindrical magnetic rod has length 5 cm and diameter 1 cm. It has uniform magnetization `5.3 xx 10^3 "A"/"m"^3`. Its net magnetic dipole moment is nearly `(pi = 22/7)`.

The dimensions of the relative magnetic permeability of the substance are ______.