Electromagnetic radiation of intensity 0.6 Wn-2 is falling on a blank surface. The radiation pressure on the surface is:
Metal detector works on the principle of
It is found that a non-zero current is unable to produce any magnetic field at a particular point. Then the angle between the current element and the position vector of that point with respect to the current element is:
The dimensions of four wires if the same material are given below. The increase in length is maximum in the wire of :
The Wheatstone bridge shown in the diagram is balanced. If P3 is the power dissipated by R3 and P1 is the power dissipated by R1, then the ratio P3/P1 is:
The velocity of a particle having a magnitude of 10 ms-1 in the direction of 60° with positive X-axis is
At very high frequencies, the current (i) in the given circuit is:
Photodiodes are mostly operated in reverse biased conditions because:
If γ is the susceptibility and μr is the relative permeability of a ferromagnetic substance, then
The Fahrenheit and Kelvin scales of temperature will have the same reading at a temperature of:
A cylindrical vessel, open at the top, contains 15 liters of water. Water drains out through a small opening at the bottom. 5 liters of water comes out in time t1, the next 5 litre in further time t2, and the last 5 litre in further time t3. then:
An engine is dragging a mass of 5000 kg with a velocity of 5 ms-1 along a smooth inclined plane of inclination 1 in 50. Then the power of the engine is
Heavy water is used to moderate in nuclear reactor because
A player can throw a ball to a maximum horizontal distance of 80 m. If he throws the ball vertically with the same velocity, then the maximum height reached by the ball is:
A wire of resistance 2R is stretched such that its length is doubled. Then the increase in its resistance is:
