List of top Physics Questions

Which of the following technique is NOT used for measuring small time intervals?
 

Centre of mass of the given system of particles will be at

A constant current flows from A to B as shown in the figure. What is the direction of current in the circle?

For the given electrical arrangement, what is the value of current \( I \)?

Two springs of force constants \( k_1 \) and \( k_2 \) are connected to a mass \( m \) as shown. The angular frequency of this configuration is:

Which graph shows the correct \( v \)–\( x \) graph of a freely falling body?

An optical fibre communication system works on a wavelength of \( 1.3 \, \mu m \). The number of subscribers it can feed, if a channel requires 20 kHz, are:
When the expansion of a gas occurs in vacuum and at constant volume, then:
In Young’s double slit experiment with sodium vapour lamp of wavelength 589 nm and slit 0.589 mm apart, the half angular width of the central maxima is
The relative errors in the measurement of two lengths \(1.02 \, \text{cm} \pm 0.01 \, \text{cm}\) and \(9.89 \, \text{cm} \pm 0.01 \, \text{cm}\) is
The relative permeability of iron is 6000. Its magnetic susceptibility is
If impedance is \( \sqrt{3} \) times resistance, then find phase difference.
Which of the following statement is incorrect?
For motion under central forces, which quantity will be conserved?
A bar magnet is oscillating in the earth’s magnetic field with a period \( T \). What happens to its period and motion, if its mass is quadrupled?
In a detector, the output circuit consists of \( R = 10 \, \text{k}\Omega \) and \( C = 100 \, \text{pF} \). The frequency of carrier signal it can detect is:
Two masses of 1g and 9g are moving with equal kinetic energy. The ratio of magnitude of their momentum is
When two bodies collide with each other such that their kinetic energy remains constant, their collision is said to be
The magnifying power of a telescope is 9. When adjusted for parallel rays, the distance between the objective and eyepiece is 20 cm. The focal lengths of lenses are:
When the speed of light becomes \( \frac{2}{3} \) of its present value, then the energy released in a given atomic explosion would
What should be the value of self-inductance of an inductor that should be connected to 220 V, 50 Hz supply, so that a maximum current of 0.9 A flows through it?
Ba-122 has half-life of 2 min. Experiment has to be done using Ba-122 and it takes 10 min to set up the experiment. It initially had 80 g of Ba-122. How much Ba-122 was left when the experiment started?
The surface tension of a liquid at its boiling point
According to Pascal’s law, pressure in a fluid at rest is the same at all points, if
Newton’s second law of rotational motion of a system of particles having angular momentum \( L \) is given by