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

If l₁, l₂, l₃ are the lengths of the emitter, base and collector of a transistor, then ____________.

Relative permeability of nickel is 550, then its magnetic susceptibility will be ____________.

For a transistor, the current ratio 'β_dc' is defined as the ratio of ______.

In the symbol for a transistor, the arrow head points in the direction of the ____________. 

The ratio of minimum to maximum wavelength in Balmer series is ____________.

The equiconvex lens has a focal length 'f'. If the lens is cut along the line perpendicular to the principal axis and passing through the pole, what will be the focal length of any half part?

Three blocks with masses m, 3m and 6m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upward at constant speed v. What is the net force on the block of mass 3 m? (g is the acceleration due to gravity)

An energy band is, ____________.

Least doped region in a transistor ____________.

For an isotropic medium B, µ, H and M, are related as (where B, µ₀, H and M_z have their usual meaning in the context of magnetic material) ____________.

A particle moves in the x-y plane under the action of a force `vec"F"` such that the value of its linear momentum `(vec"p")` at any time t is P_x = 2 cos t, p_y = 2 sin t. The angle `theta`  between `vec"F"` and `vec"P"` at a given time twill be ____________.

A coil of area A = 0.8 m² is situated in a uniform magnetic field B = 6.0 Wb/m2 and makes an angle of 60° with respect to the magnetic field as shown in figure. The value of the magnetic flux through the area A would be equal to ______. 

Sound waves are passing through two routes one in straight path and the other along a semicircular path of radius r and are again combined into one pipe and superposed as shown in the figure. If the velocity of sound waves in the pipe is v, then frequencies of resultant waves of maximum amplitude will be integral multiples of ______.

In the study of transistor as an amplifier, the ratio of collector current to emitter current is 0.98 then the ratio of collector current to base current will be ______.

The maximum and minimum tensions in the string whirling in a circle of radius 2.5 m with constant velocity are in the ratio 5 : 3. Then its velocity is ____________.

The magnetization of bar magnet of length 5 cm, cross-sectional area 2 cm² and net magnetic moment 1 Am² is ______.

A solenoid has core of a material with relative permeability 500 and its windings carry a current of 2 A. The number of turns of the solenoid is 500 per metre. The magnetization of the material is ______.

In the circuit shown, a metre bridge is in its balanced state. The metre bridge wire has a resistance 0.1 ohm/cm. The value of unknown resistance X and the current drawn from the battery of negligible resistance are ____________.

In switching circuit, transistor is in ON state. Values of I_C and I_B are 5.2 mA and 10 µA respectively and value of R_C is 1 k`Omega`. If V_cc is at 5.5 V, then V_CE is ______.

After reflection from the open end, a transverse progressive wave y_I = a sin `2pi("t"/"T" - "x"/lambda)` travels along the direction of negative X-axis. The equation of the reflected wave will be ______.