The area of the positive plate is `A_(1)` and the area of the negative plate is `A_(2)(A_(2) lt A_(1))`. They are parallel to each other and are separated by a distance `d`. The capacity of a condenser with air dielectric is.

The area of a circle is A_(1) and the area of a regular pentagon inscribed in the circle is A_(2) . Then A_(1)//A_(2) is

If the area of the circle is A_(1) and the area of the regular pentagon inscribed in the circle is A_(2), then find the ratio (A_(1))/(A_(2)) .

M and N are the plates of unequal areas of a parallel plate capacitor. Let A_(1) and A_(2) be the areas of M and N. let A_(1) gt A_(2) , M and N are connected to the +ve and -ve terminals of a battery. If Q^(+) and Q^(-) are the charges on the plates M and N respectively, then

The number of ways in which ten candidates A_(1),A_(2),A_(3),A_(4),……,A_(10) can be arranged in a row if A_(1) and A_(2) are next to each other is

Find the mutual inductance of two concentric coils of radii a_(1) and a_(2)(a_(1) lt lt a_(2)) if the planes of the coils are same.

Find the mutual inductance of two concentric coils of radii a_(1) and a_(2)(a_(1) lt lt a_(2)) if the planes of the coils are same.

Find the mutual inductance of two concentric coils of radii a_(1) and a_(2)(a_(1) lt lt a_(2)) if the planes of the coils are perpendicular.

Find the mutual inductance of two concentric coils of radii a_(1) and a_(2)(a_(1) lt lt a_(2)) if the planes of the coils are same.

Find the mutual inductance of two concentric coils of radii a_(1) and a_(2)(a_(1) lt lt a_(2)) if the planes of the coils are same.

A parallel plate condenser is made up of two plates, each of surface area 40cm^(2) , separated by a distance of 0.4 cm. If a material of dielectric constant 10 is introduced between the plates, then the capacity of the condenser is