The generalised communication system will have following essential components in sequence in a block diagram.
(A) Transmitter
(B) Channel
(C) Receiver
(D) Information source
(E) User of information
Choose the correct answer from the options given below :

Match List-I with List-II

List-I	List-II
A. Impedance of a series LCR circuit at resonance	(I) Voltage across L and C are 180 degree out of phase
B. For a series LC Circuit	(II) Current in L and C are 180 degree out of phase
C. For a parallel LC circuit	(III) Minimum
D. Reactance of a capacitor in a DC circuit	(IV) Infinite

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A radio wave of wavelength 300 m can be transmitted by a transmission center. A condenser of capacity \( 2.5 \mu F \) is available. The inductance of the required coil at resonance is
(Given: \( \pi^2 = 10 \))

Resistance R1 is with 10 \(\Omega\) resistance in series and is in the first gap of meter bridge with R2 in the second gap. The balance point is at 50 cm. When the 10 \(\Omega\) resistance is removed then the balance point shifts to 40 cm. What is the value of R1?

Identify the basic features of the photon picture of electromagnetic radiation from the following:
(A) Each photon has energy \(E = h\nu\) in vacuum.
(B) Photons are electrically neutral and are not deflected by electric and magnetic fields.
(C) All photons of light of a particular frequency \(\nu\) or wavelength \(\lambda\) have the same energy and momentum.
(D) If the intensity of light of a given wavelength is increased, there is an increase in the number of photons incident on a given area in a given time.
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There are two thin parallel charged sheets having surface charge density \( \sigma \) placed at a small distance apart. Which of the following statements are correct?
(A) If both the sheets are positively charged, then the electric field between them is \( \sigma/\epsilon_0 \)
(B) If both the sheets are negatively charged, then the electric field between them is \( \sigma/\epsilon_0 \)
(C) If the left sheet is positively charged and the right sheet is negatively charged the field between them is \( \sigma/\epsilon_0 \)
(D) If the right sheet is positively charged and the left sheet is negatively charged then the field between them is \( \sigma/\epsilon_0 \)
Choose the correct answer from the options given below:

Self Inductance of coil causes :

The typical test cross is performed between -

When phenol is treated with bromine water, the product formed is :

To reduce the resonant frequency in an LCR series circuit with a generator.

Which of the following is not a venereal disease?

Match List - I with List - II.

List - I (Disease)	List - II (Pathogen)
(A) Thalassaemia	(I) Absence of one X chromosome
(B) Phenylketonuria	(II) Inborn error of metabolism
(C) Down’s Syndrome	(III) Autosomal recessive blood disease
(D) Turner’s Syndrome	(IV) Presence of an additional copy of the 21st chromosome

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Answer the question on basis of passage given below :
Chloroform is a very useful solvent for oils, fats and waxes and many organic compounds. It can also be used for preserving biological specimens. Chloroform was used as a general anaesthetic in surgery for a long time but because of its toxic nature, it is no longer used these days.
Chloroform is useful for us because :