The current in a coil falls from 5 A to 0 A in 0.1 s. If an average emf of 100 V is induced, then the self-inductance of the coil would be

Two cells of emf 2 V and 4 V and internal resistance of \( 0.5 \text{ } \Omega \) each are connected with an external resistor of resistance \( 3 \text{ } \Omega \) as shown in the figure. The terminal potential difference of 2 V cell is:

An electric bulb rated as 220 W, 110 V is used in a circuit having a 220 V supply. For the bulb to deliver 220 W, the resistance to be added in the series is

From the given statements:
A. All photons in white light have same energy and momentum
B. When intensity of light increases the number of photons incident per second per unit area increases.
C. Photons are deflected by negative terminal of battery
D. Photoelectric (saturation) current increases with increase in the frequency of radiation
Choose the correct answer from the options given below:

For a given convex lens, if the object distance is:
(A) \(u = -\infty\)
(B) \(u = -2f\)
(C) \(u = -f\)
(D) \(u = -f/3\)
The distance of the image is arranged in decreasing order:
Choose the correct answer from the options given below:

If a current of I A flows along an infinitely long straight tube of radius R, the magnetic induction at any point inside the tube at a distance r from the axis of the tube (r < R) is:

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?

Choose the correct combination(s) :
(A) Nylon 6: Addition Copolymer
(B) Buna-S: Addition homopolymer
(C) Melamine: Condensation Copolymer
(D) Teflon : Addition homopolymer
Choose the correct answer from the options given below :

A plane electromagnetic wave of frequency 30 MHz travels in free space along the \( x \)-direction.
At a particular point in space and time, \( \vec{E} = 6.3\hat{j} \text{ V/m} \).
The magnetic field \( \vec{B} \) at this point would be:

What is Lucas Reagent?

The Q-factor of a resonant LCR series AC circuit is given by

Read the passage carefully and answer the questions
Carbohydrates such as cane sugar, glucose, starch etc. belong to a class of naturally occurring organic compounds. Structurally these are polyhydroxy aldehydes or ketones or the compounds which produce such units on hydrolysis. Carbohydrates which are sweet in taste are called sugars. Theses sugars can be reducing or non-reducing. Monosaccharides cannot be hydrolyzed to simpler units whereas Oligosaccharides yield two to ten monosaccharide units on hydrolysis. Polysaccharides yield large number of monosaccharide units on hydrolysis. This class of biomolecules is essential for living systems as they serve as storage molecules in plants and animals. In addition, they provide raw materials for important industries like furniture, textiles, paper, lacquers and breweries. Two aldopentose form important constituents of nucleic acids. Carbohydrates are also called saccharides (Greek: sakcharon which means sugar). Sugar which is used in household and in milk also comes under this class of biomolecules.
Reducing sugars respond to

Sap of which plant is fermented to produce 'Toddy' in southern India ?