When forces F1, F2, F3 are acting on a particle of mass m such that F2 and F2 are mutually perpendicular, then the particle remains stationary. If the force F1 is now removed, then the acceleration of the particle is:
In a transformer, number of turns in the primary are 140 and that in the secondary are 280. If current in primary is 4 A, then that in the secondary is :
The time period of a charged particle undergoing a circular motion in a uniform magnetic field is independent of its
At what temperature is the rms velocity of a hydrogen molecule equal to that of an oxygen molecule at 47°C ?
The mass of a product liberated on anode in an electrochemical cell depends on? Note: t is the time period for which the current is passed.
A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. The acceleration of the ball as observed by the man in the lift and a man standing stationary on the ground are respectively :
A child swinging on a swing in sitting position, stands up, then what will be the time period of the swing?
Two identical particles move towards each other with velocity 2v and v respectively. The velocity of centre of mass is :
Wavelength of light used in an optical instrument are then ratio of their respective resolving powers (corresponding to ) is:
A charged particle q is placed at the centre O of cube of length L (ABCDEPGH). Another same .charge q is placed at a distance L from O. Then the electric flux through ABCD is :
If a spring has time period T, and is cut into n equal parts, then the time period of each part will be :