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

If the length and diameter of a wire are decreased, then for the same tension the natural frequency of stretched wire will ______.

In melde's experiment, when the tension decreases by 0.009 kg-wt, the number of loops changes from 4 to 5. The initial tension is ______.

In Young's double slit experiment, for wavelength λ₁ the n^th bright fringe is obtained at a point P on the screen. Keeping the same setting, source of light is replaced by wavelength λ₂ and now (n + 1)^th bright fringe is obtained at the same point P on the screen. The value of n is ______.

Young's double slit experiment is performed in water, instead of air, then fringe width ______.

If the mass of the electron is reduced to half, the Rydberg constant ______.

Two waves with same amplitude and frequency superpose at a point. The ratio of resultant intensities when they arrive in phase to that when they arrive 90° out of phase is ______.

`[cos  pi/2=0]`

A double slit experiment is immersed in water of refractive index 1.33. The slit separation is 1 mm, distance between slit and screen is 1.33 m. The slits are illuminated by a light of wavelength 6300 Å. The fringe width is ______.

S₁ and S₂ are the two imaginary surfaces enclosing the charges +q and -q as shown. The electric flux through S₁ and S₂ are respectively ______.

In hydrogen spectrum, the wavelengths of light emitted in a series of spectral lines is given by the equation, `1/lambda` = R `(1/4^2 - 1/"n"^2)`, where n = 5, 6, 7...... and 'R' is Rydberg's constant. Identify the series and wavelength region.

The equation of stationary wave on a string clamped at both ends and vibrating in the third harmonic is given by y = 0.5 sin (0.314 x) cos (600 πt), where x and y are in cm and t in second. The length of the vibrating string is ______
(π = 3.14) 

The air column in an organ pipe closed at one end is made to vibrate so that there are 2 nodes and antinodes each. The mode of vibration is called ______ 

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) ______.

In Young's double-slit experiment, the distance between the slits is 3 mm and the slits are 2 m away from the screen. Two interference patterns can be obtained on the screen due to light of wavelength 480 nm and 600 run respectively. The separation on the screen between the 5^th order bright fringes on the two interference patterns is ______

In Young's double-slit experiment, the distance between the slits is 3 mm and the slits are 2 m away from the screen. Two interference patterns can be obtained on the screen due to light of wavelength 480 nm and 600 run respectively. The separation on the screen between the 5^th order bright fringes on the two interference patterns is ______

In an interference experiment, the intensity at a point is `(1/4)^"th"` of the maximum intensity. The angular position of this point is at ____________. 
(cos 60° = 0.5, `lambda` = wavelength of light, d = slit width)

Two coherent sources of intensities I₁ and I₂ produce an interference pattern on the screen. The maximum intensity in the interference pattern is ______

A flat curved road on highway has radius of curvature 400 m. A car rounds the curve at a speed of 24 m/s. The minimum value of coefficient of friction to prevent car from sliding is ______.

(take g = 10 m/s²)

A particle rotates in horizontal circle of radius ‘R’ in a conical funnel, with speed ‘V’. The inner surface of the funnel is smooth. The height of the plane of the circle from the vertex of the funnel is ______.

(g = acceleration due to gravity)

A particle executes uniform circular motion with angular momentum 'L'. Its rotational kinetic energy becomes half when the angular frequency is doubled. Its new angular momentum is ______.

A proton, a neutron, an electron and an α-particle have same energy. λ_p, λ_n, λ_e and λ_α are the de Broglie's wavelengths of proton, neutron, electron and α particle respectively, then choose the correct relation from the following :