The card is 10cm wide and average tine taken for it to pass under the light gate is 0.20 seconds. calculate the speed of the card

An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 26 mm and 103 mm. the electric potential of the inner conductor with respect to the outer conductor is - 700 v (k = 1/4πε 0 = 8.99 × 109 n · m2/c2) the energy stored in a 1.0-m length of this capacitor is closest to

Difference between natural and artifical magnet

The buildup of charges on an object is called