VITEEE 2021

A hollow sphere of radius \(0.1 \mathrm{~m}\) has a charge of \(5 \times 10^{-8} \mathrm{C}\). The potential at a distance of 5 \(\mathrm{cm}\) from the centre of the sphere is $$\left(\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9 \mathrm{Nm}...

The zeroth law of thermodynamics for three systems \(A, B\) and \(C\) in contact demands that

The efficiency of a Carnot engine kept at the temperatures of \(27^{\circ} \mathrm{C}\) and \(127^{\circ} \mathrm{C}\) is

According to equipartition law of energy each particle in a system of particles have thermal energy \(E\) equal to

The velocity of sound in a gas is \(1300 \mathrm{~m} / \mathrm{s}\) at STP and specific heat at constant pressure is \(6.84 \mathrm{~cal} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\). The rms velocity at STP is $$(R=1.98 \mathrm{~cal} \mathrm{~K}^...

A bar magnet of pole strength \(10 \mathrm{~Am}\) is cut into two equal parts breadthwise. The pole strength of each magnet is

The horizontal and vertical components of earth's magnetic field at a place are \(0.3 \mathrm{G}\) and \(0.52 \mathrm{G}\). The earth's magnetic field and the angle of dip are

Two straight wires each \(10 \mathrm{~cm}\) long are parallel to one another and separated by \(2 \mathrm{~cm}\). When the current flowing in them is \(30 \mathrm{~A}\) and \(40 \mathrm{~A}\) respectively, the force experienced by either of...

The magnetic field at a point on the axis of a long solenoid having 5 turns per \(\mathrm{cm}\) length when a current of \(0.8 \mathrm{~A}\) flows through it is

A long straight wire is carrying a current of \(12 \mathrm{~A}\). The magnetic field at a distance of \(8 \mathrm{~cm}\) is \(\left(\mu_0=4 \pi \times 10^{-7} \mathrm{~N} / \mathrm{A}^2\right)\)

An object is \(8 \mathrm{~cm}\) high. It is desired to form a real image \(4 \mathrm{~cm}\) high at \(60 \mathrm{~cm}\) from the mirror. The type of mirror needed with the focal length is

When an object is placed \(40 \mathrm{~cm}\) from a diverging lens, its virtual image is formed \(20 \mathrm{~cm}\) from the lens. The focal length and power of lens are

A person has a minimum distance of distinct vision as \(50 \mathrm{~cm}\). The power of lenses required to read a book at a distance of \(25 \mathrm{~cm}\) is

Based on the band theory of conductors, insulators and semi-conductors, the forbidden gap is smallest in

Which of the following logic gates are also known as the Universal gates?

If two slits in Young's experiment are \(0.4 \mathrm{~mm}\) apart and fringe width on a screen \(200 \mathrm{~cm}\) away is \(2 \mathrm{~mm}\) the wavelength of light illuminating the slits is

The distance of moon form the earth is \(3.8 \times 10^5 \mathrm{~km}\). Supposing that the eye is most sensitive to the light of wavelength \(550 \mathrm{~nm}\), the separation of two points on the moon that can be resolved by a $$500 \mat...

Unpolarised light falls on two polarising sheets placed one on top of other. If the intensity of transmitted light is one fourth of the incident light, the angle between them is

The Brewster's law is given by the expression

The power \((P)\) of an engine lifting a mass of \(100 \mathrm{~kg}\) upto a height of \(10 \mathrm{~m}\) in \(1 \mathrm{~min}\) is