Match List-I with List-II>

List-I	List-II
(A) Bandwidth	(I) information converted into electrical form and suitable for transmission
(B) Repeater	(II) Loss of strength of a signal while propagating through a medium
(C) Signal	(III) Range of frequencies over which communication system work
(D) Attenuation	(IV) Combination of receiver and transmitter

Choose the correct answer from the options given below:

Which of the following statements are true?
(A) Rheostat can be used both as a variable resistance and a potential divider.
(B) An electrical circuit is functional only if all the components of the circuit are connected in proper order, assuming that all circuit components/ devices are in working condition and key is closed.
(C) An open circuit means a break in some part of a circuit which could be deliberate such as a key in open position or a fault such as broken wire or burnt out component(s) or loose connection.
(D) Rheostat as a potential divider gives variable resistance.
Choose the correct answer from the options given below:

The depletion layer has large electrical resistance because:

dentify the correct statement(s) among the following:
(A) An electric bulb connected with a capacitor in series with electric DC source, glows with full brightness.
(B) An electric bulb connected with capacitor in series with an AC source, does not glow.
(C) An electric bulb connected with capacitor in series with a electric DC source, does not glow.
(D) An electric bulb connected with capacitor in series with an AC source, glows well.
Choose the correct answer from the options given below:

A conductor of length ' \(L\) ' is connected to a battery of emf ' \(E\) '. The drift velocity of electron in the conductor is ' \(v_d^{\prime}\). The drift velocity of electron in the conductor on stretching it four times, to length 4 L keeping emf ' \(E\) ' constant will be :

A parallel beam of light of wave length 500 nm in incident normally on a single slit of width \( 10^{-6} \, \text{m} \). The light is focused by a convex lens on a screen placed in focal plane.

The correct arrangement of electromagnetic spectrum in decreasing order of wavelength is :

Chlorine containing antibiotic produced by soil microorganisms which is effective for the treatment of typhoid fever is :

An equiconvex lens has a focal length of 20 cm and its radius of curvature is 30 cm . Its refractive index is

Consider the following data

Year(X)	2010	2011	2012	2013	2014
Profit (Rs. in thousands) (y)	10	12	14	16	13

The equation of straight line trend by method of least square for the above data is given by

The role of a catalyst is to change :

Enzymes are biological catalysts. They accelerate biological reactions. Which of the following is not true about enzymes?

The half life of a radioactive element is 140 days. After 560 days, one gram of the element will be reduced to: