Test: NEET 2020 Past Year Paper - NEET MCQ

Dimensions of stress are :

A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is :

Two bodies of mass 4 kg and 6 kg are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity (g) is :

An electron is accelerated from rest through a potential difference of V volt. If the de Broglie wavelength of the electron is 1.227 × 10^–2 nm, the potential difference is :

In a certain region of space with volume 0.2 m³, the electric potential is found to be 5 V throughout. The magnitude of electric field in this region is :

A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 27°C. Its density is : (R = 8.3 J mol^–1 K^–1)

The mean free path for a gas, with molecular diameter d and number density n can be expressed as :

A ball is thrown vertically downward with a velocity of 20m/s from the top of a tower. It hits the ground after some time with a velocity of 80m/s. The height of the tower is : ( g= 10m/s²)

For the logic circuit shown, the truth table is :

A short electric dipole has a dipole moment of 16×10^–9 C m. The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole, situated on a line making an angle of 60° with the dipole axis is :

A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5g. Another capillary tube of radius 2r is immersed in water. The mass of water that will rise in this tube is :

which of the following graph represents the variation of resistivity (ρ) with temperature (T) For copper ?

The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is : (c = speed of electromagnetic waves)

A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is : (μ₀ = 4π×10^-7 Tm A^-1)

For which one of the following, Bhor model is not valid?

The energy equivalent of 0.5 g of a substance is :

Taking into account of the significant figures, what is the value of 9.99 m–0.0099 m?

In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency increases to 7 Hz. If the frequency of A is 530 Hz, the original frequency of B will be :

A series LCR circuit is connected to an AC voltage source. When L is removed from the circuit, the phase difference between current and voltage is π / 3 . If instead C is removed from the circuit, the phase difference is again π / 3 between current and voltage. The power factor of the circuit is :

The quantities of heat required to raise the temperature of two solid copper spheres of radii r₁ and r₂  (r₁ = 1.5 r₂) through 1 K are in the ratio :

The Brewster’s angle i_b for an interface should be :

Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is :

An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m^-1 . The permeability of the material of the rod is : (μ₀ = 4π×10^-7 T mA^-1)

The capacitance of a parallel plate capacitor with air as medium is 6 mF. With the introduction of a dielectric medium, the capacitance becomes 30 mF. The permittivity of the medium is : (ε₀ = 8.85 × 10^-12 C² N^-1 m^-2)

A charged particle having drift velocity of 7.5×10^-4 ms^-1 in an electric field of 3×10^-10 Vm^-1 has a mobility in m² V^-1 s^-1 of :

The color code of a resistance is given below:

The values of resistance and tolerance, respectively, are :

The solids which have the negative temperature coefficient of resistance are :