Email

Chat with tutors

Login

Ask Questions, Get Answers

Menu X

home ask tuition questions practice papers mobile tutors pricing

X

Recent questions and answers in 2003

Questions >> JEEMAIN and NEET >> NEET PAST PAPERS >> 2003

The term "antibiotic" was coined by : -

answered Jul 18, 2020 by kphasnashirin

1 answer

Tobacco mosaic virus is a tubular filament of size : -

answered Jul 18, 2020 by kphasnashirin

1 answer

Following diagram performs the logic function of :

answered Nov 17, 2019 by meena.clay6

1 answer

A nuclear reaction given by $_ZX^A \to _{Z + 1}Y^A + _{–1}e ^0 + \overline{v}$ represents

answered Nov 17, 2019 by meena.clay6

1 answer

The mass number of a nucleus is

answered Nov 17, 2019 by meena.clay6

1 answer

The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of $^4_2He$ is (Given : helium nucleus mass ≈ 4.0015 u)

answered Nov 17, 2019 by meena.clay6

1 answer

Barrier potential of a p-n junction diode does not depend on -

answered Nov 17, 2019 by meena.clay6

1 answer

If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be :

answered Nov 17, 2019 by meena.clay6

1 answer

Diamagnetic material in a magnetic field moves :

answered Nov 17, 2019 by meena.clay6

1 answer

According to Curie's law, the magnetic susceptibility of a substance at an absolute temperature T is proportional to -

answered Nov 17, 2019 by meena.clay6

2 answers

A n-p-n transistor conducts when

answered Nov 17, 2019 by meena.clay6

1 answer

Which of the following ray are not electromagnetic waves

answered Nov 17, 2019 by meena.clay6

1 answer

J.J. Thomson's cathode-ray tube experiment demonstrated that

answered Nov 17, 2019 by meena.clay6

1 answer

Reverse bias applied to a junction diode

answered Nov 17, 2019 by meena.clay6

1 answer

In which of the following systems will be radius of the first orbit (n = 1) be minimum -

answered Nov 17, 2019 by meena.clay6

2 answers

A sample of radioactive element has a mass of 10 gm at an instant t = 0. The approximate mass of this element in the sample after two mean lives is :

answered Nov 17, 2019 by meena.clay6

1 answer

A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2m then -

answered Nov 17, 2019 by meena.clay6

1 answer

The volume occupied by an atom is greater than the volume of the nucleus by a factor of about

answered Nov 17, 2019 by meena.clay6

1 answer

Fuse wire is a wire of

answered Nov 17, 2019 by meena.clay6

1 answer

Solar energy is mainly caused due to :

answered Nov 17, 2019 by meena.clay6

1 answer

Three capacitors each of capacity $4 \mu F$ are to be connected in such a way that the effective capacitance of $6 \mu F$. This can be done by -

answered Nov 16, 2019 by meena.clay6

1 answer

In a Wheatstone's bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is :

answered Nov 16, 2019 by meena.clay6

1 answer

An electric kettle has two heating coils. When one of the coils is connected to an a.c. source, the water in the kettle boils in 10 minutes. When the other coil is used the water boils in 40 minutes. If both the coils are connected in parallel, the time taken by the same quantity of water to boil will be :-

answered Nov 16, 2019 by meena.clay6

1 answer

Two 220 volt, 100 watt bulbs are connected first in series and then in parallel. Each time the combination is connected to a 220 volt a.c. supply line. The power drawn by the combination in each case respectively will be :

answered Nov 16, 2019 by meena.clay6

1 answer

A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to this period and motion if this mass is quadrupled -

answered Nov 16, 2019 by meena.clay6

2 answers

A charged particle moves through a magnetic field in a direction perpendicular to it. Then the

answered Nov 16, 2019 by meena.clay6

1 answer

A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is -

answered Nov 16, 2019 by meena.clay6

1 answer

An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The coulomb force $\overrightarrow{F}$ between the two is - <br> (where $K = \frac{1}{4 \pi \varepsilon_0}$ )

answered Nov 16, 2019 by meena.clay6

1 answer

A charge q is located at the centre of a cube. <br> The electric flux through any face is -

answered Nov 16, 2019 by meena.clay6

1 answer

The potential energy of a simple harmonic oscillator when the particle is half way to its end point is -

answered Nov 16, 2019 by meena.clay6

1 answer

Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities K and 2K, respectively. The equivalent thermal conductivity of the slab is -

answered Nov 16, 2019 by meena.clay6

1 answer

An ideal gas heat engine operates in a carnot cycle between $227^{\circ}C$ and $127^{\circ}C$. It absorbs 6 kcal at the higher temperature. The amount of heat (in kcal) converted into work is equal to -

answered Nov 16, 2019 by meena.clay6

1 answer

We consider the radiation emitted by the human body. Which of the following statements is true :

answered Nov 16, 2019 by meena.clay6

1 answer

A equiconvex lens is cut into two halves along (i) XOX' and (ii) YOY' as shown in the figure. Let f, f' f" be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively Choose the correct statement from the following-

answered Nov 16, 2019 by meena.clay6

1 answer

In case of a forced vibration, the resonance wave becomes very sharp when the :

answered Nov 16, 2019 by meena.clay6

1 answer

A particle of mass m oscillates with simple harmonic motion between points $x_1$ and $x_2$, the equilibrium position being O. Its potential energy is plotted. It will be as given below in the graph :

answered Nov 16, 2019 by meena.clay6

1 answer

The time period of a mass suspended from a spring is T. If is the spring is cut into four equal parts and the same mass is suspend from one of the parts, then the new time period will be -

answered Nov 16, 2019 by meena.clay6

1 answer

An observer moves towards a stationary source of sound with a speed $1/5^{th}$ of the speed of sound. The wavelength and frequency of the source emitted are $\lambda$ and $f$ respectively. The apparent frequency and wavelength recorded by the observer are respectively :

answered Nov 16, 2019 by meena.clay6

1 answer

A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will

answered Nov 16, 2019 by meena.clay6

2 answers

A man throws ball with the same speed vertically upwards one after the other at an interval of 2 seconds. What should be the speed of the throw so that more than two balls are in the sky at any time ? (Given $g = 9.8 m/s^2$)

answered Nov 16, 2019 by meena.clay6

1 answer

Two spheres of masses m and M are situated in air and the gravitational force between them is F. The space around the masses in now filled with a liquid of specific density 3. The gravitational force will now be :

answered Nov 16, 2019 by meena.clay6

2 answers

The vector sum of two forces is perpendicular to their vector differences. In that case, the forces :

answered Nov 16, 2019 by meena.clay6

1 answer

A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its centre of mass is K. If radius of the ball be R, then the fraction of total energy associated with its rotational energy will be :

answered Nov 16, 2019 by meena.clay6

1 answer

A man weighs 80 kg He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of $5m/s^2$. What would be the reading on the scale ? ($g = 10 m/s^2$)

answered Nov 16, 2019 by meena.clay6

2 answers

A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it but will break if the mass exceeds 25 kg. What is the maximum acceleration with which the monkey can climb up along the rope ? ($g = 10 m/s^2$)

answered Nov 16, 2019 by meena.clay6

1 answer

The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2m on the surface of A. What is the height of jump by the same person on the planet B.

answered Nov 16, 2019 by meena.clay6

1 answer

When a long spring is stretched by 2 cm, its potential energy is U. If the spring is stretched by 10 cm, the potential energy stored in it will be :

answered Nov 16, 2019 by meena.clay6

1 answer

A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length L and height h. What is the speed of its centre of mass when the cylinder reaches its bottom -

answered Nov 16, 2019 by meena.clay6

1 answer

A stationary particle explodes into two particles of masses $m_1$ and $m_2$ which move in opposite directions with velocities $v_1$ and $v_2$. The ratio of their kinetic energies $\frac{E_1}{E_2}$ is :

answered Nov 16, 2019 by meena.clay6

1 answer

A thin circular ring M and radius ‘r’ is rotating about its axis with a constant angular velocity $\omega$. Four objects each of mass m, are kept gently to the opposite ends of two perpendicular diameters of the ring. The angular velocity of the ring will be -

answered Nov 16, 2019 by meena.clay6

1 answer

To see more, click for all the questions in this category.

Feedback Terms Facebook Twitter About Us

Your payment for is successful.

...