Physics

For the given circuit the current i through the battery when the key in closed and the steady state has been reached is__________.

A square loop of side 20 cm and resistance  is moved towards right with a constant speed v₀. The right arm of the loop is in a uniform magnetic field of 5T. The field is perpendicular to the plane of the loop and is going into it. The loop is connected to a network of resistors each of value 4. What should be the value of v₀ so that a steady current of 2 mA flows in the loop

An object of mass 'm' is being moved with a constant velocity under the actin of an applied force of 2N along a frictionless surface with following surface profile.

The correct applied force vs distance graph will be:

 

 

A sample of gas with $\gamma =1.5$  is taken through an adiabatic process in which the volume is compressed from 1200 cm³ to 300 cm³. If the initial pressure is 200 kPa. The absolute value of the work done by the gas in the process =_________J.

A parallel plate capacitor of capacitance 200 $\mu F$  is connected to a battery of 200V. A dielectric slab of dielectric constant 2 is now inserted into the space between plates of capacitor while the battery remain connected. The change in the electrostatic energy in the capacitor will be_______J.

Cross-section view of a prism is the equilateral triangle ABC in the figure. The minimum deviation is observed using this prism when the angle of incidence is equal to the prism angle. The time taken by light to travel from P (midpoint of BC) to A is_______* 10^-10s. (Given, speed of light in vacuum = 3 * 10⁸ m/s and  cos30° =   $\frac{\sqrt[]{3}}{2})$

A mass of 5kg is connected to a spring. The potential energy curve of the simple harmonic motion executed by the system is shown in the figure. A simple pendulum of length 4m has the same period of oscillation as the spring system. What is the value of acceleration due to gravity on the planet where these experiments are performed?

At very high frequencies, the effective impendance of the given circuit will be_______ $\Omega .$  

In a Young's double slit experiment, the slits are separated by 0.3mm and the screen is 1.5m away from the plane of slits. Distance between fourth bright fringes on both sides of central bright is 2.4cm. The frequency of light used is______* 10¹⁴ Hz.

A long solenoid with 1000 turns/m has a core material with relative permeability 500 and volume 10³ cm³. If the core material is replaced by another material having relative permeability of 750 with same volume maintaining same current of 0.75A in the solenoid, the fractional change in the magnetic moment of the core would be approximately $\left(\frac{x}{499}\right).$  Find the value of x.