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An AC source is connected to a capacitor. The current in the current is I. Now a dielectric slab is inserted into the capacitor , then the new current is

Magnetic moment of a current carrying square loop be M . If it is converted in form of circle and same current is passed through it then find the new magnetic moment.

Magnetic moment of a current carrying square loop be M . If it is converted in form of circle and same current is passed through it then find the new magnetic moment.

A short magnet oscillates in a vibration magnetometer with a time period of 0.10 s where the horizontal component of earth's magnetic field is 24 mu T . An upward current of 18 A is established in the vertical wire placed 20 cm east of the magnet . Find the new time period.

In a hostel 60% of the students read Hindi news paper, 40% read English news paper and 20% read both Hindi and English news papers. A student is selected at random. (a) Find the probability that she reads neither Hindi nor English news papers. (b) If she reads Hindi news paper, find the probability that she reads English news paper. (c) If she reads English news paper, find the probability that she reads Hindi news paper.