The average power associated with an ideal capacitor of capacitance \( 5 \ \mu\text{F} \) connected to an alternating emf \( E = 200 \sin 100\pi t \) is:

On which of the following factors angular fringe width does not depend?

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

Match list-I with list-II

List-I	List-II
(A) Rays used in satellite communication	(I) X rays
(B) Rays produced in nuclear reaction	(II) Gamma rays
(C) Radiation used for studying crystal structure	(III) Ultraviolet rays
(D) Radiation absorbed by ozone layer	(IV) microwave

Choose the correct answer from the options given below:

In a feedback amplifier, if the feedback voltage is in opposite phase, the gain is less than 1. Then it will:

The electric field and magnetic field of a plane electromagnetic wave propagating in vacuum are expressed as
\(E_x=E_0 \sin (k z-\omega t)\)
\(B_y=B_0 \sin (k z-\omega t)\)
Which of the following statements are correct?
(A). The wave is propagating along the z- direction.
(B). The electric field Ex and magnetic field By are perpendicular to each other and perpendicular to the z direction.
(C) The electric and magnetic fields Ex and By are perpendicular to each other, and parallel to the direction of propagation.
(D) k is related to the wave length À of the wave by the usual equation \(k = A / 2 Tt\)
Choose the correct answer from the options given below:

The work function of a photoelectric surface is 3.3 eV. The value of the threshold frequency for the surface is :

After the completion of replication, each DNA molecule will have one parental strand and one newly synthesized strand. This scheme is known as:

Which of the following statements are true?
(A) The potential energy for a system of two negative point charges is negative
(B) Electrostatic force is a conservative force
(C) Negative potential energy between two charges implies that the force between them is repulsive
(D) Electrostatic potential energy is a scalar quantity
Choose the correct answer from the options given below:

Arrange the halogens in the increasing order of bond dissociation enthalpy :
(A) \(F_2\)
(B) \(Cl_2\)
(C) \(Br_2\)
(D) \(I_2\)
Choose the correct answer from the options given below :

The magnetic flux through a coil perpendicular to the plane is varying according to the relation \( \phi = (7t^3 + 3t^2 - 2t - 2) \, \text{Wb} \). If the resistance of the coil is \( 10\Omega \), the induced current through the coil at t = 2 s, will be

A 100 W bulb working on 200 V and a 200 W bulb on 100 V, have their resistances in the ratio

The value of \(\tan ^2\left(\sec ^{-1} 2\right)+\cot ^2\left(\operatorname{cosec}^{-1} 3\right)\) is: