VITEEE Physics Test - 1 - JEE MCQ

If elements with principal quantum number n >= 4 were not allowed in nature, then, the number of possible elements would be

If a cell of constant electromotive force produces the same amount of heat during the same time in two independent resistances R₁ and R₂, when connected separately one after the other, across the cell, then the internal resistance of the cell is

Optical fibres uses the phenomenon of

A wire of radius r has resistance R. If it is stretched to a radius of 3r/4, its resistance becomes

The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the uniform electric field between the plates is E, is

Determine the current drawn from a 12 v supply with internal resistance 0.5Ω by the infinite network shown in the figure . Each resistor has Ω resistance

A cell whose e.m.f. is 2V and internal resistance is 0.1Ω, is connected with a resistance of 3.9Ω. The voltage across the cell terminal will be

In an electron gun, the electrons are accelerated by the potential V. If e is the charge and m is the mass of an electron, then the maximum velocity of these electrons will be

A bar magnet dropped into a coil of a conducting wire, along its axis, will fall with an acceleration

A generator at a utility company produces 100 A of current at 4000 V. The voltage is stepped up to 240000 V by a transformer before it is sent on a high voltage transmission line. The current in transmission line is

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

Consider the situation in the figure. The work done in taking a point charge from P to Ais W_A, from P to B is W_B and from P to C is W_C.
 

A dust particle of mass 10^-3 gm is stationary between the plates of a horizontal parallel plate capacitor of 0 .016m separation which is connected to a voltage of 100V. How many fundamental charges (e = 1.6 x 10^-19 C)   the dust particle carries

A capacitor of capacity C₁ is charged upto V volt and then connected to an unchanged capacitor of capacity C₂. The potential difference across each capacitor will be

A charge q is placed at the corner of a cube of side l. The electric flux passing through the cube is

Dielectric constant of a medium is unity. Its permittivity will be:

If a current is passed in a spring, it

The phenomena in which proton flips is

The first atomic reactor was constructed by

The average binding energy of the nucleon is

If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000Å to 4000Å, then

When a centimeter thick surface is illuminated with light of wavelength λ, stopping potential is V. When the same surface is illuminated by light of wavelength 2 λ, stopping potential is V/3. Threshold wavelength for metallic surface is

In Ramsden's eye-piece, the distance from the eye lens at which the image due to objective of focal length f is formed is

Which of the following spectrum have all the frequencies from high to low frequency range ?

While a collector emitter voltage is constant in a transistor, the collector current changes by 8.2 m A .When the emitter current changes by 8.3 m A, the value of forward current ratio h_fe is

When the p-end of the p-n junction is connected to the negative terminal of the battery and the n-end to the positive terminal of the battery, then the p-n junction behaves like

Potential barrier developed in a junction diode opposes