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

If the length of potentiometer wire is increased, then the length of the previously obtained balance point will ______.

If V_n and Vp are orbital velocities in n^th and p^th orbit respectively, then the ratio V_p: V_n is ______.

The relation between magnetic moment of revolving electron 'M' and principle quantum number 'n' is ______.

Two students X and Y perform potentiometer experiment separately and null point was obtained as shown in diagram. During the experiment, ______.

1. X increases the value of R (resistance)
2. Y decreases the value of S (resistance)

The position of null point obtained by students X and Y respectively.

A student connected the circuit as shown in the figure to determine the internal resistance of a cell E1 by potentiometer (E > E1). He is unable to obtain the null point because ______.

Two waves are given as y₁ = 10 sin ωt cm and y₂ = 10 sin `(omegat + pi/3)` cm are superimposed. What is the amplitude of the resultant wave? `[cos  pi/3 = 1/2]`

What should be the length of a closed pipe to produce resonance with a sound wave of wavelength 62 cm, in fundamental mode? Neglect end correction.

The radius of the orbit of a geostationary satellite is (mean radius of the earth R, angular velocity about an axis in ω and acceleration due to gravity on earth's surface is (g) ______.

A uniform disc of mass 4 kg has radius of 0.4 m. Its moment of inertia about an axis passing through a point on its circumference and perpendicular to its plane is ______.

A disc rolls down a smooth inclined plane without slipping. An inclined plane makes an angle of 60° with the vertical. The linear acceleration of the disc along the inclined plane is ______.

(g = acceleration due to gravity, sin 30° =cos 60° `=1/2,` sin 60° = cos 30° `=sqrt3/2`)

A thin circular ring of mas 'M' and radius 'R' is rotating about a transverse axis passing through its centre with constant angular velocity 'ω'. Two objects each of mass 'm' are attached gently to the opposite ends of a diameter of the ring. What is the new angular velocity?

In a potentiometer experiment when three cells A, B, C are connected in series the balancing length is found to be 740 cm. If A and B are connected in series, the balancing length is 440 cm and when B and C are connected in series, it is 540 cm. The e.m.f. of A, B, and C cells E_A, E_B, E_C are respectively (in volt) ______

A potentiometer wire is 4 m long and a potential difference of 3 V is maintained between the ends. The e.m.f. of the cell which balances against a length of 100 cm of the potentiometer wire is ______

The bob of a simple pendulum is released at time t = 0 from a position of small angular displacement. Its linear displacement is ______.

(l = length of simple pendulum and g = acceleration due to gravity, A = amplitude of S.H.M.)

A block of mass 16 kg moving with velocity 4 m/s on a frictionless surface compresses an ideal spring and comes to rest. If force constant of the spring is 100 N/m then how much will be the spring compressed?

A potentiometer wire of length 'L' and a resistance 'r' are connected in series with a battery of E.M.F. 'E₀' and a resistance 'r₁'. A cell of unknown E.M.F, 'E' is balanced at a length 'ℓ' of the potentiometer wire. The unknown E.M.F. E is given by ______ 

In the potentiometer experiment, the balancing length with a cell E₁ of unknown e.m.f. is 'ℓ₁' cm. By shunting the cell with resistance R Ω, the balancing length becomes `ℓ_1/2` cm, the internal resistance (r) of a cell is ______

In the potentiometer experiment, cells of e.m.f. E₁ and E₂ are connected in series (E₁ > E₂). the balancing length is 64 cm of the wire. If the polarity of E₂ is reversed, the balancing length becomes 32 cm. The ratio `E_1/E_2` is ______   

Which graph shows the variation of magnetic susceptibility (`chi`) with magnetizing field (H) for a paramagnetic substance?

The displacement of the particle performing S.H.M. is given by x = 4 sin πt, where x is in cm and t is in second. The time taken by the particle in second to move from the equilibrium position to the position of half the maximum displacement, is ______.

`[sin30^circ=cos60^circ=0.5, cos30^circ=sin60^circ=sqrt3/2]`