A beam of light travelling along X-axis is described by the electric field E_y = 600 V/m. \(\sin~\omega \Big(t-\frac xc\Big),\) the maximum magnetic force on a charge q = 2e, moving along Y-axis with the speed of 3 × 10⁸ m/s is:

1.  19.2 × 10^-17 N

2.  1.92 × 10^-17 N

3.  0.192 N

4.  None of these

In the given figure, potential difference between \(A\) and \(B\) is:

1. 0
2. \(5~\mathrm{V}\)
3. \(10~\mathrm{V}\)
4. \(15~\mathrm{V}\)

In the given figure what will be the coefficient of mutual inductance?

1. \(\frac{\mu_0a}{2\pi}in\Big(1+\frac{a}{2b}\Big)\)
2. \(\frac{\mu_0a}{\pi}in\Big(1+\frac{b}{2a}\Big)\)
3. \(\frac{\mu_0a}{2\pi}in\Big(1+\frac{a}{b}\Big)\)
4. \(\frac{\mu_0a}{2\pi}in\Big(1+\frac{b}{a}\Big)\)

A metal rod at a temperature of \(145^\circ\text{C}\), radiates energy at a rate of \(17~\text{W}\). If its temperature is increased to \(273^\circ\text{C}\), then it will radiate at the rate of:
1. \( 49.6~\text{W} \)
2. \( 17.5~\text{W} \)
3. \( 50.3~\text{W} \)
4. \(67.5~\text{W} \)

A square wire of side \(2.0~\mathrm{cm}\) is placed \(20~\mathrm{cm}\) in front of a concave mirror of focal length \(10~\mathrm{cm}\) with its centre on the axis of the mirror and its plane normal to the axis. The area enclosed by the image of wire is:
1. \( 7.5 \mathrm{~cm}^2 \)
2. \( 6 \mathrm{~cm}^2 \)
3. \(2 \mathrm{~cm}^2 \)
4. \( 4 \mathrm{~cm}^2\)