Explore topic-wise InterviewSolutions in .

Question 1Find the focal length of a convex mirror whose radius of curvature is 32 cm.

In an experiment of find the focal length of a concave mirror a graph is drawn between the magnitudes of u and v. The graph looks like [AIIMS 2003]

Why does a man feels whightless on an natural satelite?

A man fires a gun &amp; hears an echo from a hill after 5s. He then moves 200m towards the hill &amp; then fires again. This time he hears an echo after 3.78s. Calculate i) velocity of sound in air ii) distance between the original position of man &amp; the hill.

What is tension and its applications?

A gun of mass M kg fires a shell of mass 1.5 kg with a velocity of 150 ms-1 and refills with a velocity of 1.5 m s-1 calculate the mass of the gun

Define Pascal's Law.

The value of universal gravitational constant is equal to _________.

When you slap someone, thinking physics wise, you shouldn't feel sorry. Can you think why?

A piece of steel weighs W in air, weighs W1 when completely immersed in water and W2 when completely immersed in an unknown liquid. The relative density (specific gravity) of liquid is :

26. calculate the density of solid if its crystallises in fcc lattice and its edge length is 250pm (At mass =60g)

20.How to take out power of a lens?

in a bohrs model of an atomwhen an electron jumps from n=1 to n=3,how much energybwill be emitted or absorbed

a projectile with initial velocity U and angle theta find time and final velocity if final velocity is perpendicular to initial velocity

If the wind blows in the direction of sound then the Speed of sound becomes:(v = final speed of sound; Vs = speed of sound; Vw = speed of wind)

Q. Velocity of a particle is given by v=(2t+3)m/s, then average velocity in interval t=0 to t=1s is- 1)3.5m/s 2)4.5m/s 3)4m/s 4)5m/s

A bullet of mass 20 g moving with a velocity of 100 ms−1​ strikes a wooden block of mass 80 g and gets embedded into it. Calculate velocity of the combined system.

A particle is moving along a straight line such thatits velocity varies with position as shown in figure.then the acceleration of the particle at x 10 m is2015(u) x(1) -4.6 m/s2(2) -6.8 m/s2(3) -8.9 m/s2(4) -10.6 m/s2

34.A body A going from South to North and body B is going from West to East. Then direction of relative velocity of A with respect to B is

Calculate the area of cross section of a wire of length 2m, its resistance is 25Ω and the resistivity of material of wire is 1.84*10-6 Ωm

Why doesn't the moon fall into the earth?

Question 23How is the refractive index of a medium related to the speed of light? Obtain an expression for the refractive index of a medium with respect to another in terms of speed of light in these two media?

Match the following physical quantities with their respective SI units.

Two cells are connected to an external load of resistance 2 Ω as shown in figure. The current through the load resistance will be :

A body weighs 100 N on the surface of Earth. What will be the acceleration due to gravity acting on the body at a height of 3400 km above Earth's surface? Taking the mass of Earth=6×1024 kg, Radius of earth=6.4×106 m and G=6.7×10−11 Nm2kg−2.

Four charges are placed at the corners of a square of side a.+QWork done by external agent in carrying an electron from point O to O' is4ekQ4eko (5-2/2)4ekQ

THE WEIGHT OF THE OBJECT IS ZERO AT?

How can the displacement of a body be negative?

For the situation shown in the figure, find the velocity of the image formed by the mirror.

a thin rod AB of length l is kept vertical on a horizontal floor such that end A is in contact with floor if the rod is allowed to fall without slipping at end A then its angular velocity just before hitting the ground is

Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3×108m?

Dimension on viscosity

Two capacitors of capaci†an ces 4μ F and 6μ F are connected in series with a battery of 20V . Find the energy supplied by the battery

The magnetic axis of earth makes an angle of ___ with the axis of rotation of the earth.

The vector sum of two forces is perpendicular to their vector difference .in that case, the forces 1)are equal to each other 2)are equal to each other in magnitude 3)are not equal to each other in magnitude 4)cannot be predicte

Difference between electrostatic force and magnetic force.

The binding energy per nucleon is maximum at the mass number A=56 and its value is around ____ MeV

A clock face has charges −q, −2q, −3q,...−12q fixed at the position of the corresponding numbers on the dial. The clock hands do not disturb the net field due to the point charges. Then, at what time does the hour hand point in the direction of the electric field at the centre of the dial?

Discovery of the nucleus of an atom was due to the experiment carried out by

Two objects moving along the same straight line are leaving point A with initial velocities 2u and u and accelerations a and 2a respectively at t=0.The distance moved by the objects ,when one object overtakes the other ,w.r.t Point A is_

For the circuit shown in the following diagram what is the value of [3 MARKS] (i) current through 6 ohm resistor (ii) potential difference across 12 ohm

When a charge is moving parallel to the magnetic field, what is the magnetic force acting on the charge?

Question 28Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.

46. The escape velocity of a sphere of mass m fromthe surface of earth is given by (G Universal 5gravitational constant; M- Mass of the earth andR Radius of the earth)

What is the place called where vast amounts of oil is trapped?

The radius of Jupiter is 11 times the radius of the Earth. Calculate the ratio of the volumes of Jupiter and the Earth. How many Earth's and Jupiter accommodate?

A man fires a gun & hears an echo from a hill after 5s. He then moves 200m towards the hill & then fires again. This time he hears an echo after 3.78s. Calculate i) velocity of sound in air ii) distance between the original position of man & the hill.

A bullet of mass 20 g moving with a velocity of 100 ms−1 strikes a wooden block of mass 80 g and gets embedded into it. Calculate velocity of the combined system.