AFMC Physics Mock Test - 5 - NEET MCQ

A student has 10 resistors of resistance 'r'. The minimum resistance made by him from given resistors is

Light of wavelength 5000 Å is incident on a metal, whose work-function is 2 eV. The maximum kinetic energy of the photoelectrons would be

Resistance of a wire at 20°C is 20 Ω and at 500°C is 60 Ω. At what temperature its resistance is 25 Ω ?

Threshold wavelength for photoelectric emission from a metal surface is 5200 Å. Photoelectrons will be emitted when this surface is illuminated with monochromatic radiation from

In an A.C. circuit, a resistance of R Ω is connected in series with an inductance L. If phase angle between voltage and current is 45°, the value of inductive reactance will be

Faraday's laws are the consequence of the conservation of

Two infinitely long parallel conducting plates having surface charge densities +σ and -σ respectively, are separated by a small distance. The medium between the plates is vacuum. If ε₀ is the dielectric permittvity of vacuum, then electric field in the region between the plates is

A 10 μF capacitor is charged to a potential difference 50 V and it is then connected to another uncharged capacitor in parallel. If common potential difference becomes 20 V, then capacitance of the second capacitor is

The electrostatic capacity of a capacitor depends upon its

Spot the wrong statement. The acceleration due to gravity 'g' decreases if

Which of the following is the best example of an ideal black body

The specific heat of a gas at constant pressure is greater than that of the same gas at constant volume because

A person is standing in an elevator. In which situation he finds his weight less?

At what temperature is the root mean square velocity of gaseous hydrogen molecules is equal to that of oxygen molecules at 47°C

A molecule of mass m of an ideal gas collides with the wall of a vessel with a velocity ν and returns back with the same velocity. The change in the momentum of molecule is

A charge q moves on a region where electric field and magnetic field both exist, then force is

A cylinder is floating in two liquids as shown in figure. Choose the correct options:

If the value of surface tension of a liquid is 70 dyne-cm⁻¹, then its value in N-m⁻¹ will be

Raindrops are falling from a certain height. Assume all raindrops are spherical and have same drag coefficient. The impact speed of large raindrops compared to that of small raindrops is

If pressure inside two soap bubbles are 1.01 and 1.02 atm respectively, then the ratio between their volumes is (Take atmospheric pressure = 1 atm)

The shape of liquid meniscus in capillary tube will be concave upwards, if the angle of contact is

A 20 cm long capillary tube is dipped in water. The water rises up to 8 cm. If entire arrangement is put in a freely elevator, the length of water column in the capillary tube will be

The work done in stretching a wire by 1 mm is 4 J. The work done in stretching another wire of the same material, but with double the radius and half the length by 2 mm is

How much force is required to produce an elongation of 0.2% in the length of a brass wire of diameter 0.6 mm? (Take Young's modulus for brass = 0.9x10¹¹ N-m⁻²)

The initial velocity of a body moving along a straight line is 7 m−s⁻¹. It has a uniform acceleration of 4 m−s⁻². The distance covered by the body in the 5th second of its motion is

Presbyopia arises due to

If the period of oscillation of mass (M) suspended from a spring is 2 s, then the period of mass 4 M will be