A solution of sodium chloride discharges `6.1 xx 10^16Na^+` ions and `4.6 xx 10^6 Cl^-` ions in 2s. Find the current passing through the solution.

Add 6.75 xx 10^3 cm to 4.52 xx 10^2 cm

A coil containing 20 turns of average diameter 0.02 m is placed perpendicular to a magnetic field of intensity 1.6 xx 10^4 T . The magnetic field changes to 1.8 xx 10^3 T in 4 s. A resistor of resistance 15 ohm is connected in sereis with the coil. If the resistance of the coil is 5 ohm, find the induced current passing through the resistor.

If 2.25 xx 10^20 electrons pass through a wire in one minute, find the magnitude of the current flowing through the wire.

The count rate from a radiuactive sample falls from 4.0 xx 10^6 s^(-1) to 1.0 xx 10^6 s^(-1) in 20 hours.What will be the count rate 100 hours after the beginning.

Assuming that the charge of an electron is 1.6 xx 10^-19C , the number of electrons passing through a section of wire per second, when the wire carries a current of 1 A is

The rate constant for a reaction is 1.6 xx10^-5 and 6.36 xx 10^-3 s^-1 at 600 K and 700 K respectively. Calculate the activation energy for the reaction.

The number density of electron in copper is 8.5 xx10^(28)m^(-3) . Find the current flowing through a copper wire of length 20 cm, area of cross section 1 mm square,when connected to a battery of 3 V. Given the electron mobility = 4.5xx10^(-6)m^(2)V^(-1) s^(-1) and electron charge = 1.6 xx 10^(-19)C.