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A particle of mass m is given a velocity u on a rough horizontal surface of friction coefficient μ. The average power imparted by friction until it stops is
21
Oct
A particle of mass m is given a velocity u on a rough horizontal surface of friction coefficient μ. The average power imparted by friction until it stops is A particle of mass m is given a velocity u on a rough horizontal surface of friction coefficient μ. The average power imparted by friction until [...]
A particle of mass m is thrown with speed u at an angle of projection θ with horizontal. The average power imparted by the gravitational force until it strikes the ground is
21
Oct
A particle of mass m is thrown with speed u at an angle of projection θ with horizontal. The average power imparted by the gravitational force until it strikes the ground is A particle of mass m is thrown with speed u at an angle of projection θ with horizontal. The average power imparted by [...]
Water falling from a 50 m high fall is to be used for generating electric energy. If 18×10^5 kg of water falls per hour and half the gravitational potential energy can be converted into electric energy, how many 100 W lamps can be lit?
21
Oct
Water falling from a 50 m high fall is to be used for generating electric energy. If 18×10^5 kg of water falls per hour and half the gravitational potential energy can be converted into electric energy, how many 100 W lamps can be lit? Work done from d = 0 m to d = 3 [...]
A car of mass m is driven with acceleration a along a straight level road against a constant external resistive force R. When the velocity of the car V, the rate at which the engine of the car is doing work will be
21
Oct
A car of mass m is driven with acceleration a along a straight level road against a constant external resistive force R. When the velocity of the car V, the rate at which the engine of the car is doing work will be A car of mass m is driven with acceleration a along a [...]
A car of mass 1250 kg is moving at 30(m)/(s). Its engine delivers 30 kW while resistive force due to surface is 750 N. What maximum acceleration can be given to the car
21
Oct
A car of mass 1250 kg is moving at 30(m)/(s). Its engine delivers 30 kW while resistive force due to surface is 750 N. What maximum acceleration can be given to the car A car of mass 1250 kg is moving at 30(m)/(s). Its engine delivers 30 kW while resistive force due to surface is [...]
A body of mass m accelerates uniformly from rest to velocity v0 in time t0. The instantaneous power delivered to the body at any time t is
21
Oct
A body of mass m accelerates uniformly from rest to velocity v0 in time t0. The instantaneous power delivered to the body at any time t is A body of mass m accelerates uniformly from rest to velocity v0 in time t0. The instantaneous power delivered to the body at any time t is October [...]
The power of a water pump is 2 kW. If g=10m/s^2, the amount of water it can raise in 1 min to a height of 10 m is :
21
Oct
The power of a water pump is 2 kW. If g=10m/s^2, the amount of water it can raise in 1 min to a height of 10 m is : the amount of water it can raise in 1 min to a height of 10 m is : The power of a water pump is 2 [...]
The dominant mechanisms for motion of charge carriers in forward and reverse biased silicon p-n junctions are (1) drift in forward bias, diffusion in reverse bias (2) diffusion in forward bias, drift in reverse bias
21
Oct
The dominant mechanisms for motion of charge carriers in forward and reverse biased silicon p-n junctions are (1) drift in forward bias, diffusion in reverse bias (2) diffusion in forward bias, drift in reverse bias diffusion in reverse bias (2) diffusion in forward bias drift in reverse bias The dominant mechanisms for motion of charge [...]
A circular insulated copper wire loop is twisted to form two loops of area A and 2A as shown in the figure. At the point of crossing the wires remain electrically insulated from each other. The entire loop lies in the plane (of the paper). A uniform magnetic field B point into the plane of the paper. At t=0, the loop starts rotating about the common diameter as axis with a constant angular velocity ω in the magnetic field. Which of the following options is/are correct?
21
Oct
A circular insulated copper wire loop is twisted to form two loops of area A and 2A as shown in the figure. At the point of crossing the wires remain electrically insulated from each other. The entire loop lies in the plane (of the paper). A uniform magnetic field B point into the plane of [...]
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are kept on top of two identical solenoids as shown in the figure . When current I is switched on in both the solenoids in identical manner ,
identical in shape and size but having different reistivities ρA and ρB ,
repectively ,
the rings A and B jump to heights hA and hB ,
Two metallic rings A and B ,
with hA > hB . The possible relation(s) between their resistivities and their masses mA and mB is(are) ,
In a pn junction diode not connected to any circuit (1) The potential is the same everywhere (2) The p-type is a higher potential than the n-type side (3) There is an electric field at the junction directed from the n-type side to the p-type side.
21
Oct
In a pn junction diode not connected to any circuit (1) The potential is the same everywhere (2) The p-type is a higher potential than the n-type side (3) There is an electric field at the junction directed from the n-type side to the p-type side. then the correct connections will be Two pn junctions [...]