The force between two poles is reduced to P newton, when their original separation is increased to x times, it is increased to Q newton, when their separation is made 1/xth of their original value. Then the relation between P and Q is

IF the different between the roots of x^(2) -px+q=0 is 2, then the relation between p , and q is

If the area of each plate is A and the separation between them is d, then find the equivalent capacitance between P and Q

The focal length of a combination of two lenses is doubled if the separation between them is doubled. If the separation is increased to 4 times, the magnitude of focal length is

When the operating voltage in an -X-ray tube is increased to 3 times the original value, the shortest wavelength shifts by 25 nm. Find the original value of the operating voltage.

When the separation between two charges is increased, the electric potential energy of the charges

When the separation between two charges is increased, the electric potential energy of the charges

When the temperature is raised through 1^(@)C the volume is increased by (1)/(273) th times of the original volume . This is

When the separation between two charges is increase the electric potential energy of the charges.

In a parallel plate capacitor, the separation between the plates is 3mm with air between them. Now a 1mm thick layer of a material of dielectric constant 2 is introduced between the plates due to which the capacity increases. In order to bring its capacity of the original value, the separation between the plates must be made- 1.)1.5 mm 2.)2.5 mm 3.)3.5 mm 4.)4.5 mm

Force between two identical bar magnets whose centres are r metre apart is 4.8 N , when their axes are in the same line. If separation is increased to 2r , the force between them is reduced to