The slope of the cut off voltage versus frequency of incident light is found to be \(4.12 \times 10^{-15} Vs\).
The value of Planck's constant is :

An aeroplane having a wing span of 40 m flies due north at a speed of \( 100 \, \text{m s}^{-1} \) in magnetic field \( 5 \times 10^{-5} \, \text{T} \) acting vertically downward. The potential difference between the tips of the wings is

The ratio of intensities of two waves is 16:1. If these two are superimposed, What is the ratio of maximum and minimum intensities?

The torque acting on a magnet of magnetic length 8 cm and pole strength 20 A m placed in a magnetic field of \( 3 \times 10^{-5} \, T \) at an angle of \( \pi/6 \) rad will be

The average value of a.c. over a full cycle in an ac circuit is : (Given \( I_0 \) = Peak current)

A transmitting station transmits radio waves of wavelength 300 m. The inductance of the coil required with a capacitor of capacity 1.0 \( \mu F \) in a resonant circuit will be

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:

Which of the following pairs represent the example of homology?

In some organisms, male has ZZ chromosomes and female has ZW chromosomes. This type of sex-determination is found in:

Match List-I with List-II

List-I (Reaction)	List-II (Type of reaction)
(A) Hydrolysis of Ethyl Chloride	(I) Substitution reaction
(B) 2-Propanol is treated with Conc. Sulphuric acid	(II) Addition reaction
(C) Reaction of HCN with Acetone	(III) Degradation reaction
(D) Treatment of acetamide with NaOH and Br2	(IV) Elimination reaction

Choose the correct answer from the options given below:

Read the passage carefully and answer the Questions
Haloalkanes undergo nucelophilic substitution reactions owing to the polarity of CX bond. The nucleophile reacts with the haloalkane on the carbon possessing a partial positive charge holding the halogen atom. The halogen atom X is replaced by a nucleophile. Depending on the kinetics and mode of bond breaking, the mechanism can be either SN1 or SN2 reaction. The rate of SN1 reaction is governed by the stability of carbocation and in SN2 reaction, the rate of reaction is governed by steric factor. Chirality is the main factor in both SN1and SN2. In SN1 reaction, the chirality of alkyl halide is accompanied by racemization of the product, while in SN2 reaction, the product is characterized by inversion of configuration. The structure of alkyl halide and the nature of the solvent also governs the mechanism of the substitution.
Hydrolysis of 2-Chlorobutane will result in formation of

A coin is biased so that the head is three times as likely to occur as tail. If the coin is tossed twice, the mean of the number of tails is:

If \(A\) is a square matrix of order 3 such that \(|A|=2\), then \(\operatorname{adj}(\operatorname{adj} A)\) is :