Class 12th

Which is the correct ascending order of wavelengths?

A metallic conductor of length 1m rotates in a vertical plane parallel to east-west direction about one of its end with angular velocity 5rad s^-1. If the horizontal component of earth's magnetic field is 0.2 * 10^-4T, then emf induced between the two ends of the conductor is:

Two coils of self inductance L₁ and L₂ are connected in series combination having mutual inductance of the coils as M. The equivalent self inductance of the combination will be:

In free space, an electromagnetic wave of 3 GHz frequency strikes over the edge of an object of size $\frac{\lambda }{100},$ where $\lambda$ is the wavelength of the wave in free space. The phenomenon, which happens there will be

A bar magnet having a magnetic moment of 2.0 * 10⁵ JT^-1, is placed along the direction of uniform magnetic field of magnitude B = 14 * 10^-5 T. The work done in rotating the magnet slowly through 60° from the direction of field is:

If Electric field intensity of a uniform plane electro magnetic wave is given as $E=-301.6sin\left(kz-\omega t\right){\widehat{a}}_x+452.4sin\left(kz-\omega t\right)\widehat{a}t\frac{V}{m}.$  

Then, magnetic intensity 'H' of this wave in Am^-1 will be:

[Given : Speed of light in vacuum c = 3 * 10⁸ ms^-1, Permeability of vacuum ${\mu }_0=4\pi *10^{-7}N{A}^{-2}$ ]

The equivalent resistance between points A and B in the given network is:

A proton and an alpha particle of the same velocity enter in a uniform magnetic field which is acting perpendicular to their direction of motion. The ratio of the radii of the circular paths described by the alpha particle and proton is