AFMC Physics Mock Test - 4 - NEET MCQ

Two resistances of 400 Ω and 800 Ω are connected in series with 6 volt battery of negligible internal resistance. A voltmeter of resistance 10,000 Ω is used to measure the potential difference across 400 Ω . The error in the measurement of potential difference in volts approximately is

The Lenz's law gives

A parallel plate capacitor is made by stacking n equally spaced plates connected alternatively. If capacitance between any two adjacent plates is C, then the resultant capacitance is

The mass of a particle is 400 times than that of an electron and the charge is double. The particle is accelerated by 5 V. Initially the particle remained in rest, then its final kinetic energy will be

Photoelectric effect proves the

A 220 V, 1000 watt bulb is connected across a 110 V mains supply. The power consumed will be

The average power dissipation in a pure capacitor in AC circuit is

There is an electric field E in x-direction. If the work done on moving a charge of 0.2C through a distance of 2m, along a line making an angle 60° with x-axis is 4 J, then what is the value of E?

A rocket can go vertically upwards in earth's atmosphere because

Two capacitors of capacity 4 μF and 6 μF are connected in series and a battery is connected to the combination the energy stored is E₁. If they are connected in parallel and if the same battery is connected to this combination the energy stored is E₂. The ratio of E₁ and E₂ is

A wagon weighing 1000 kg is moving with velocity of 50 km/h on smooth horizontal rails. A mass of 250 kg is deopped into it. The velocity with which it moves now is

The root mean square velocity of the gas molecules is

At a given temperature the root mean square velocities of oxygen and hydrogen moleucles are in the ratio

A glof ball of mass 0.05 kg placed on a tee, is struck by a golf club. The speed of the golf ball as it leaves the tee is 100 m/s, the time of contact between them is 0.02 s. If the force decreases to zero linearly with time, then the force at the beginning of the contact is

A current of 2 ampere flows in a long, straight wire of radius 2 mm. The intensity of magnetic field at the axis of the wire is 

A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were halved and the temperature doubled, the power radiated in wattt would be

The rate of flow of water in a capillary tube of length 'l' and radius 'r' is 'V'. The rate of flow in another capillary tube of length '2l' and radius '2r' for same pressure difference would be

The velocity of efflux of an ideal liquid depend upon

Two spheres of equal masses but radii r₁ and r₂ are allowed to fall in a liquid of infinite column. The ratio of their terminal velocities are

A wooden cube is floating water with a body of mass 200 g placed on it. When the body is removed, the cube rises 2 cm above the water level. The side of the cube is

Two wires of same radius and length are subjected to the same load. One wire is of steel and the other is of copper. If Young's modulus of steel is twice that of copper, then ratio of elastic potential energies stored per unit volume in steel wire to that in copper wire is

The extension in a string, obeying the Hooke's law, is x. The speed of sound in the stretched string is v. If the string is extended to 1.5 x, then speed of sound will be

A car travels first half distance between two places with a speed of 30 km/h and remaining half with a speed of 50 km/h. The average speed of the car is

A stone of mass of 16 kg is attached to a string 144 m long and is whirled in a horizontal circle. The maximum tension the string can withstand is 16 Newton. The maximum velocity of revolution that can be given to the stone without breaking it, will be

Two white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which these dots can be resolved by the eye? (Take wavelength of light = 500 nm)

Which one of the following is ture for a small iron ball when placed just at the centre of the horizontal pole pieces of a strong electromagnet and then released ?

An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm. The nature of image is