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

The wavelength of photon emitted by a hydrogen atom when an electron makes a transition from n = 2 to n = 1 state is. (Take the value of the Rydberg constant, \(R = 1.0973 \times 10^7 \text{ m}^{-1}\))

A plane concave lens of glass (\( \mu = 1.5 \)) has a radius of curvature of its curved face 50 cm. The power of the lens is :

A transformer with turns ratio \( \frac{N_1}{N_2} = \frac{100}{1} \) is connected to a 240 V ac supply. If the primary and secondary resistance are \( 1.0 \text{ k}\Omega \) and \( 1 \ \Omega \) respectively, then find the output power ?

A change of current from 6.0 A to 3.0 A in 300 ms in a coil produces an induced emf of 0.5 V in the neighboring coil. The mutual inductance between the two coils would be

The speed of light in a medium whose critical angle is \(60^{\circ}\) will be:

The nuclear force is a short range force, this can be explained by fact that the binding energy per nucleon versus mass number curve:

Read the given paragraph and answer the question:
Humans have 23 pairs of chromosomes. 22 pairs are exactly same in both males and females; these are the autosomes. A pair of X-chromosome are present in the female, whereas the presence of an X and Y chromosome are determinant of the male characteristic.
A number of disorders in human beings have been found to be associated with the inheritance of changed or altered genes or chromosomes. Broadly, genetic disorder may be grouped into two categories-Mendelian disorders and Chromosomal disorders.
A haemophilic man marries a normal woman. What is the possibility that their child have haemophilia?

Which of the following is not the property of \( \beta \) ray?

The angle between the lines
\(l_1: \frac{x+1}{1}=\frac{2-y}{2}=\frac{z-1}{1}\) and \(l_2: \frac{x-1}{4}=\frac{2 y-4}{6}=\frac{z-1}{2}\), is:

The maximum torque acting on a coil having an effective area \( 0.04 \text{ m}^2 \) and carrying current of \( 100 \mu A \) is \( 4 \times 10^{-8} \text{ N m} \), when placed in a magnetic field. The magnitude of the magnetic field is

Helium gas is filled in a transparent balloon which is kept in air. The balloon behaves as:

For fixed radii of curvature of a lens, power is proportional to :