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

With forward biased mode, the p-n junction diode ______.

The equation of the progressive wave is y = 3sin `[ pi("t"/3-x/5) + pi/4]`, where x and y are in metre and time in second. Which of the following is correct?

A progressive wave is represented by y = 12 sin (5t - 4x) cm. On this wave, how far away are the two points having phase difference of 90°?

In a compound microscope, let u₀ and v₀ be the object distance and image distance respectively. The objective of focal length f₀ magnifies a tiny object into a real, inverted image. The linear magnification of the objective is ______.

A beam of light passes from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three refractive indices n₁, n₂ and n₃?

The stress-strain graph of a material is shown in the figure. The region in which the material is elastic is ______.

Which of the following expression represents the relation between orbital magnetic moment and orbital angular momentum of an electron?

A bar magnet of magnetic moment M₁ is cut into two pieces along its axis. The pieces are kept perpendicular to each other with their unlike poles in contact. The magnetic moment of the arrangement is M₂. The ratio of M₁/M₂ is ______.

If a body is executing simple harmonic motion, then ______.

Two simple harmonic motion are represented by the equations, y₁ = 10 sin `(3pi"t"+pi/4)` and y₂ = 5`(3sin3pi"t"+sqrt3cos3pi"t")`. Their amplitudes are in the ratio of ______.

Halley's Comet revolves around the sun for a time period of 76 years. The aphelion distance if perihelion is given by 8.9 × 10¹⁰ m, will be ______.

(Take, the mass of sun = 2 × 10³⁰ kg and G = 6.67 × 10^-11 Nm³/kg²)

The temperature of a liquid drops from 365 K to 361 K in 2 min. Find the time during which the temperature of the liquid drops from 344 K to 342 K.

(Take, room temperature = 293 K)

An alternating voltage varies with time (t) as V = 100 sin (50 πt). The rms voltage and the frequency respectively, are ______.

A semicircular wire of radius a having λ as charge per unit length is shown in the figure. Find the electric potential at the centre of the semicircular wire. 

In a common emitter amplifier, the input resistance is 1000 Ω, the peak value of Input signal voltage is 5 mV, and β = 60. The peak value of output current is

The magnetic susceptibility of a paramagnetic material at - 73°C is 0.0075. Its value at - 173°C will be ______.

A batsman hits a ball of mass 0.2 kg straight towards the bowler without changing its initial speed of 6 m/s. What is the impulse imparted to the ball?

A transistor has a voltage gain A. If the amount βA of its output is applied to the input of the transistor, then the transistor becomes oscillator, when ______.

A sound wave has a frequency of 500 Hz and a velocity of 350 m/s. The distance between the two particles having a phase difference of 60° is near ______

In conversion of moving coil galvanometer into an ammeter of required range, the resistance of ammeter, so formed is ______.
[S = shunt and G = resistance of galvanometer]