The fact that a ray parallel to the principal axis in a concave mirror, after reflection, passes through the principal focus illustrates the focusing property of concave mirrors. This phenomenon is utilized in understanding image formation.

The focal length (f) of a spherical mirror is the distance between the pole and the principal focus. It is represented by the letter f and provides a quantitative measure of the mirror’s ability to converge or diverge light rays.

The radius of curvature (R) of a spherical mirror is the distance from the pole to the center of curvature. It is represented by the letter R.

In a concave mirror, the reflecting surface is curved inwards, while in a convex mirror, the reflecting surface is curved outwards.

When the length of a wire is doubled, the ammeter reading decreases to one-half. This indicates an inverse relationship between the length of the wire and the current flowing through it.

The ammeter reading increases when a thicker wire of the same material and length is used in the circuit. This is because a thicker wire offers less resistance to the flow of current compared to a thinner wire of the ...

A change in the ammeter reading is observed when a wire of different material, but with the same length and cross-sectional area, is used. This variation in reading is attributed to the different electrical conductivity properties of materials, where some ...

The resistivity of an alloy is generally higher than that of its constituent metals due to the combined effects of different atomic structures and impurities introduced during the alloying process. This increased resistivity makes alloys suitable for specific applications, such ...

he size of the concentric circles depends on the distance from the wire, following an inverse relationship similar to that observed with a straight wire.

Directly below, the magnetic field lines circulate counterclockwise, and directly above, they circulate clockwise around the power line.