Exercise-1

A capacitor is having a capacity of $2 \mathrm{pF}.$ Electric field across the capacitor is changing with a value of ${10}^{12} \mathrm{V} {\mathrm{s}}^{-1}.$ The displacement current is

The velocity of electromagnetic wave is parallel to

Which of the following required no medium for propagation ?

An $\alpha$-particle moves along a circular path of radius $0.83 \mathrm{cm}$ in a magnetic field of $0.25 \mathrm{Wb} {\mathrm{m}}^{-2}.$ The de-Broglie wavelength associated with it will be

The de Broglie wavelength of a tennis ball of mass $60 \mathrm{g}$ moving with a velocity of $10$ meter per second is approximately - (Planck's constant, $h=6.63\times {10}^{-34}\mathrm{Js}$)

Which of the following statements is wrong

Production of continuous $X$ -rays is caused by

The graph between the square root of the frequency of a specific line of characteristic spectrum of $X-$ rays and the atomic number of the target will be