A photon of wavelength 300nm interacts with a stationary hydrogen atom in ground state. During the interaction, whole energy of the photon is transferred to the electron of the atom. State which possibility is correct. […]
A 0.01 H inductor and √3 πΩ resistance are connected in series with a 220 V, 50 Hz Ac source. The phase difference between the current and emf is
Options
(a) π ∕ […]
A dynamo converts
Options
(a) mechanical energy into thermal energy (b) electrical energy into thermal energy (c) thermal energy into electrical energy (d) mechanical energy into electrical energy
Correct Answer:
mechanical energy into […]
The value of Planck’s constant is
Options
(a) 6.63×10⁻³⁴ J.Sec (b) 6.63×10³⁴ J/Sec (c) 6.63×10⁻³⁴ kg.m² (d) 6.63×10³⁴ kg/sec
Correct Answer:
6.63×10⁻³⁴ J.Sec
Explanation:
No explanation available. Be the first to write the […]
Out of the following which pair of quantities does not have same dimensions?
Options
(a) Planck’s constant and angular momentum (b) Work and energy (c) Pressure and Young’s modulus (d) Torque and moment […]
A spring gun of spring constant 90 N/cm is compressed 12 cm by a ball of mass 16g. If the trigger is pulled,the velocity of the ball is
Options
(a) 50 ms⁻¹ (b) […]
When a mass M is attached to the spring of force constant k, then the spring stretches by l. If the mass oscillates with amplitude l, what will be the maximum potential energy stored in […]
When sound is produced in an aeroplane with a velocity of 200 m/s horizontally, its echo is heard after 10√5 seconds. If velocity of sound in air is 300 ms⁻¹ the elevation of aircraft is […]
In the experiment for determination of velocity of sound in air, using the resonance column method, the length of the air column that resonates in the fundamental mode with a tuning fork is 0.1 m. […]
In Young’s double slit experiment, the fringe width is 1×10⁻⁴ m, if the distance between the slit and screen is doubled and the distance between two slits is reduced to half and the wavelength is […]
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