Embibe Experts Solutions for Chapter: Solved Physics Paper-1, Exercise 1: Exercise-Choice

Explain the working of LED.

Obtain an expression for magnetic field on the axis for current carrying toroid with the help of Ampere's circuital law. Draw necessary diagram.

For refraction at a spherical surface derive the relation $\frac{n_2}{v}-\frac{n_1}{u}=\frac{n_2-n_1}{R}$ in object distance $\left(u\right)$, image distance $\left(v\right)$ refractive index of media $\left(n_1,n_2\right)$. and radius of curvature $\left(R\right)$. Draw the necessary ray diagram.

Draw a ray diagram for the formation of image by compound microscope. Derive an expression of the angular magnification of it when the final image is formed at the closest comfortable distance $\left(D\right)$ for viewing the image.

Define electric dipole. Derive an expression for an electric field intensity due to an electric dipole at a point on the equatorial plane of the electric diagram. Draw necessary diagram.

Define electric field intensity. Derive an expression for the electric field intensity at a point due to an infinitely long uniformly charged straight wire with the help of Gauss law. Draw the necessary diagram.

What do you mean by rectification? Draw circuit diagram and explain the working of full wave rectifier. Represent the wave form of input and output voltages also.

What do you mean by reverse biasing of P-N junction diodes? Draw circuit diagram for reverse biasing of P-N junction diode and explain its working process. Draw V-I characteristic curve for reverse biasing.