A circular loop is placed in the plane of the paper in a magnetic field B. A current is induced in the loop in an anticlockwise direction. This is because the magnetic field B is

Speed of Electromagnetic wave is not the same :

Rohit has been given two converging lenses of focal lengths 1.25 cm and 5 cm, respectively to design a compound microscope. If it is desired to have a magnification of 30, what would be the separation between the objective and the eyepiece when the final image is formed at the least distance of distinct vision?

If a p-n junction is forward biased, then what is the direction of diffusion and drift current across the junction?

If charge is moving perpendicular to uniform magnetic field then its time period of revolution is:

For the L-R series circuit connected to an ac mains \(e = e_0 \sin \omega t\), the average power consumed is: (Symbols have their usual meanings)

Which of the following change is observed when light travels from air to glass ?

Which of the following is true?

The corner points of the bounded feasible region determined by the system of linear constraints are \((0,0), (5,0), (6,5)\), \((6,8),(4,10), (0,8)\). Let \(Z=3 x-4 y\) be the objective function. The minimum value of \(Z\) occurs at

A charge of \( Q = 8.0 \times 10^{-9} \text{ C} \) is uniformly distributed on the surface of a spherical shell of radius \( R = 10 \text{ cm} \). The electric field at a distance of 10 cm from the outer surface of the shell is

A resistor develops 800 J of thermal energy in 20 s on applying a potential difference of 20 V. Its resistance is

Answer the question on the basis of passage given below :
Adsorption is a surface phenomenon and it differs from absorption which occurs throughout the body of the substance that absorbs. In physiosorption the attractive forces are mainly van der Waal's forces while in chemisorption ionic/covalent bonds are formed between particles of adsorbent and adsorbate. The catalytic activity of finely divided iron in Haber's process of ammonia manufacture can be explained by adsorption theory. Adsorption being an exothermic process, the heat of adsorption is utilised in enhancing the rate of the reaction. Adsorption has many applications being used in gas masks, control of humidity, chromatograph separation, curing diseases etc.
Which of the following is not correct regarding the adsorption of a gas on the surface of solid ?
(A) On increasing temperature, adsorption increases continuously.
(B) Enthalphy and entropy changes are negative.
(C) Chemical adsorption is more specific than physical adsorption.
(D) High temperature favours physical adsorption.
Choose the correct answer from the options given below :

A 0.5 m long solenoid has 500 turns and has a flux density of \( 2.52 \times 10^{-3} \text{ T} \) at its centre.
The current flowing in the solenoid would be (given, \( \mu_0 = 4\pi \times 10^{-7} \text{ Hm}^{-1} \))