WBJEE (Physics) Model Test

A particle is moving with a constant speed ν in a circle. What is the magnitude of average velocity after half rotation?

The resistance across A and B in the figure below will be  

Current through ABC and A'B'C' is I. What is the magnetic field at P? BP = PB' = r (Here C'B' PBC are collinear)

Which type of Gate the following truth table represents?

A box is moved along a straight line by a machine delivering constant power. The distance moved by the body in time t is proportional to

A material has Poisson’s ratio 0.50. If a uniform rod of it suffers a longitudinal strain of 2 × 10^–3, then the percentage change in volume is

A cricket ball of mass 0.25 kg with speed 10 m/s collides with a bat and returns with same speed within 0.01 S. The force acted on bat is

If g is the acceleration due to gravity on the surface of the earth, the gain in potential energy of an object of mass m raised from the earth’s surface to a height equal to the radius R of the earth is

In an inelastic collision an electron excites as hydrogen atom from its ground state to a M-shell state. A second electron collides instantaneously with the excited hydrogen atom in the M-State and ionizes it. At least how much energy the second electron transfers to the atom in the M-state?

In the nuclear reaction ¹⁴₇N + X -> ¹⁴₆C + ¹₁H the X will be?

A stone of relative density K is released from rest on the surface of a lake. If viscous effects are ignored, the stone sinks in water with an acceleration of

The magnetic field at the point of intersection of diagonals of a square wire loop of side L carrying a current I is

The charge on the capacitor of capacitance C shown in the figure below will be

A cubical vessel of height 1 m is full of water. What is the amount of work done in pumping water out of the vessel? (Take g =10 m s_–2)

Two cells with the same e.m.f. E and different internal resistances r₁ and r₂ are connected in series to an external resistance R. The value of R so that the potential difference across the first cell be zero is

If the Earth were to suddenly contract to 1/n th of its present radius without any change in its mass, the duration of the new day will be nearly

A body of mass 6 kg is acted upon by a force which causes a displacement in it given by, x = t²/ 4 metre where t is the time in second. The work done by the force in 2 seconds is

Five equal resistance, each of resistance R, are connected as shown in figure below. A battery of V volt is connected between A and B. The current flowing in FC will be  

A radioactive nucleus of mass number A, initially at rest, emits an α-particle with a speed ν . The recoil speed of the daughter nucleus will be

If a person can throw a stone to maximum height of h metre vertically, then the maximum distance through which it can be thrown horizontally by the same person is