A symmetric double convex lens of power 4D is cut in two halves by plane perpendicular to the principal axis. The power of each half is :

A capacitor of unknown capacitance is connected with a battery of V volts. The charge stored in it is \( 200 \, \mu\text{C} \). When the potential of the capacitor is reduced by 100 volts, the charge stored in it becomes \( 150 \, \mu\text{C} \). The unknown capacitance is:

The magnetic field lines are completely expelled from a material when ( \(\chi\) is the susceptibility and \(\mu_r\) is relative permeability)

In experimental arrangement to study photoelectric effect, here M, N, O and P respectively are

(A) Commutator
(B) Evacuated glass tube
(C) Quartz window
(D) Photosensitive plate
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Relation between rms voltage and peak voltage of an AC source is :

Which of the following statements are correct?
(A) Total internal reflection occurs when a ray of light travels from a rarer transparent medium to a denser medium.
(B) In total internal reflection, the incident ray of light remains in the same medium after reflection.
(C) In total internal reflection, the angle of incidence inside the denser transparent medium is equal to the angle of reflection in the same medium.
(D) In total internal reflection inside a denser medium there is no angle of refraction
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A bar magnet with pole strength m and magnetic dipole moment p is cut into two identical pieces along its length.
Then for each of the two pieces

Answer the question on the basis of passage given below :
Adsorption is a surface phenomenon which can be expressed by means of an empirical relationship know as Freundlich Adsorption isotherm. The relationship given by \(\frac{x}{m} = Kp^{\frac{1}{n}}\ (n > 1)\)
x = Mass of the gas adsorbed
m = Mass of adsorbent
p = Pressure at which adsorption takes place
K and n are constant
The curve of above relationship indicate that at a fixed pressure there is a decrease in physical adsorption with increase in temperature. At high pressure, curves become parallel to pressure axis, indicating saturation of the surface of adsorbent.
Adsorption of a gas follow Freundlich isotherm shown below. \(\frac{x}{m}\) is proportional to

If \(y=x \sin y\), then \(\frac{d y}{d x}\) is:

The chemical formula of Magnetite is :

Match List I with List II

LIST I	LIST II
A. Furacine	I. Non-narcotic
B. Antihistamines	II. Artificial Sweetener
C. Alitame	III. Antiseptics
D. Aspirin	IV. Terfenadine

Choose the correct answer from the options given below:

The transition element having least number of unpaired electrons, is:

If it is 7:00 pm currently in the clock, what will the clock show (in am or pm) after 674 hours?