If the diameter of a conductor is double, then its resistance will be reduced to
If the distance between two charges is halved, then the force between them becomes
If the excitation to the field of the D.C motor is constant, then the torque developed in the motor is proportional to
If the frequency of a sound wave is reduced to half of its original value, then the speed of sound wave will:
If the image formed in the mirror is always erect, equal in size to the object, then the mirror is
If the phase difference between two points is 120° for a wave with velocity of 360 m/ & frequency 500 Hz, then path difference between the two points is
If the potential difference across a parallel plate air capacitor is increased, the electric field intensity between the plates will increase
If the radius of the earth were to shrink by one per cent, its mass remaining the same, the value of g on the earths surface would
If the secondary winding of the current transformer is opened when current is flowing in the primary current, then following will result
If the spinning speed of the earth is increased then the weight of body at the equator will be
