List of top Physics Questions

Energy of electron (in eV) in 2nd orbit of He ion ?
Calculate the mean % error in five observations : 80.0, 80.5, 81.0, 81.5, 82
A square conducting loop is placed near an infinitely long current carrying wire with one edge parallel to the wire as shown in the figure. If the current in the straight wire is suddently halved, which of the following statements will be true? "The loop will ....... "
A sphere and a cube of same material and same volume are heated upto same temperature and allowed to cool in the same surroundings. The ratio of the amounts of radiations emitted will be
A proton and an $\alpha$-particle are simultaneously projected in opposite directions into a region of uniform magnetic field of $2\, mT$ perpendicular to the direction of the field. After some time it is found that the velocity of proton has changed in direction by $90^{\circ}$. Then at this tune, the angle between the velocity vectors of proton and $\alpha$ - particle is
You are given an ammeter, a galvanometer and a voltmeter. From these, the device having maximum resistance is
The time period of oscillation of a magnet in a vibration magnetometer is 1.5 sec. The time period of oscillation of another magnet similar in size, shape and mass but having 1/4 magnetic moment than that of the 1st magnet oscillating at the same place will be
The relation between Shear modulus $ (G) $ , Young?? modulus $ (T) $ and Poissons ratio $ (v) $ is _______
The given transistor operates in saturation region then what should the be value of $V_{BB}: (R_{out} = 200 \Omega, R_{in} = 100 K\Omega, V_{CC} = 3 volt, V_{BE} = 0.7 volt, V_{CE} = 0, \beta; = 200)$
The equivalent capacitance between A and B is,
Taking the radius of the earth to be $6400 \,km$, by what percentage will the acceleration due to gravity at a height of $100\, km$ from the surface of the earth differ from that on the surface of the earth?
satellite revolve in radius R has a time period of revolution T. Find time period of a satellite if orbital radius is 9R?
One horse power (1 HP) is equal to
In toroid magnetic field on axis will be radius = 0.5 cm, current = 1.5A, turns = 250, permeability = 700.
For the system given below, find time period of oscillation?
An object floats in water with 10% of its volume outside and in oil 30% of its volume outside. The specific gravity of the oil is
A semicircular arc of radius r and a straight wire along the diameter, both are carrying same current i. Find out magnetic force per unit length at point P.
Which one of the following graphs represents the variation of electric field with distance $r$ from the center of a charged spherical conductor of radius $R$?
In the following circuit, what are P and Q?
A gun applies a force F on a bullet which is given by $F = (100 - 0.5 10^5 \times t )N$. The bullet emerges out with speed $400 \,m/s^{-1}$. Then find out the impulse exerted till force on bullet becomes zero
The radius of gyration of a thin uniform circular disc (of radius R) about an axis passing through its centre and lying in its plane is
A block of mass 2 kg is free to move along the x-axis. It is at rest and from t = 0 onwards it is subjected to a time-dependent force F(t) in the x direction. The force F(t) varies with t as shown in the figure. The kinetic energy of the block after 4.5 seconds is
A thin wire of mass M and length L is bent to form a circular ring. The moment of inertia of this ring about its axis is
A cylinder of height 1m is filled with water. If a small orifice is made at a height of 0.25 m from the ground, the horizontal range of water stream will be :
A point mass $M$ moving with a certain velocity collides with a stationary point mass $M/2$. The collision is elastic and in one-dimension. Let the ratio of the final velocities of $M$ and $M/2$ be $x$. The value of $x$ is