Which of the following are not electromagnetic waves?
A. Gamma rays
B. Cathode rays
C. X-rays
D. \(\beta\)-rays
E. Radio waves
Choose the correct answer from the options given below:

In the given figure, a diode D is connected to an external resistance R = 100 \( \Omega \) and an emf of 2.5 V. During forward bias, if the barrier potential developed across the diode is 0.6 V, the current in the circuit will be

Two parallel large thin metal sheets have equal charge densities of \( 5.31 \times 10^{-11} \text{ C/m}^2 \) of opposite signs. If the permittivity of free space is \( \epsilon_0 = 8.85 \times 10^{-12} \text{ C}^2 \text{N}^{-1} \text{m}^{-2} \), the electric field between these sheets will be:

The current and power dissipation in an inductor coil are 2 A and 200 W, respectively.
When connected to an alternating source of 220 V, 50 Hz. The resistance and inductance of the coil are (take \( \pi^2 = 10 \)):

In a semiconductor let the number of charge carriers be n and the average drift speed be v. An electric field is applied to it. If we increase the temperature of this semiconductor then :

Two nuclei have mass numbers in the ratio \(3:5\). The ratio of their nucleus densities would be :

In a hydrogen atom, an electron moves in an orbit of radius \( 5 \times 10^{-11} \text{ m} \) with a speed of \( 2.2 \times 10^6 \text{ m/s} \). The equivalent current is

Insulin deficiency in human beings causes diabetes. Excess of which hormone causes an increase in blood pressure?

What sum of money is needed to invest now so as to get Rs. 5000 at the beginning of every month forever, if the money is worth 6% per annum compounded monthly?

The resistance of a potentiometer wire of length 4 m is \( 10 \ \Omega \).
A resistance box and a 2 V accumulator are connected in series with it.
What resistance should be introduced in the box to have a potential drop of \( 1 \ \mu\text{V/mm} \) along the potentiometer wire?

Read the passage carefully and answer the questions
Alcohols and phenols are formed when a hydrogen atom in a hydrocarbon, aliphatic and aromatic respectively is replaced by -OH group. These are further classified on the basis of number of hydroxy groups and according to the hybridization of the carbon atom \(sp ^2\) or \(sp ^3\) to which the -OH group is attached. They find applications in industry as well as in day-to-day life. One of the most commercially obtained alcohol also known as wood spirit is obtained by destructive distillation of wood. Both alcohols and phenols are acidic in nature. The acidity of alcohols and phenols vary according to the nature of substituent(s) attached to them. Alcohols and phenols react with carboxylic acids, acid chlorides and acid anhydrides to form esters. Introduction of acetyl group in alcohols and phenols is called acetylation. Phenol undergo electrophilic aromatic substitution reaction because the -OH activates the benzene ring. It undergoes nitration, halogenation and sulphonation reactions.
Which compound is also known as 'wood spirit'?

Choose the correct statements for ortho and para nitrophenol
(A) They can be separated by steam distillation
(B) o-Nitrophenol undergoes intramolecular hydrogen bonding
(C) P-Nitrophenol undergoes inter molecular hydrogen bonding
(D) p-Nitrophenol is less volatile
Choose the correct answer from the options given below:

The correct IUPAC name of tert-butyl benzyl ether is-