Show that, if the range of an ammeter is increased n times, its resistance becomes `(1)/(n)` times its previous value.

Show that , if the range of an ammeter is increases n times, its resistance decreases n times.

Show that , if the range of a voltmeter is increases n times, its resistance also increases n times.

Range of an ammeter is increases by n times. What is the change in its resistance ?

If the voume of a sphere is incereased by 8 times, then its radius will be increased by

Statement : I A galvanometer of resistance G is converted to an ammeter by increasing its range n times. The resistance of the ammeter is (G)/(n) . Statement : II A shunt of resistance (G)/(n-1) has to be connected in parallel with a galvanometer in order to increase its range n times.

If the current sensitivity of a moving coil galvanometer is increased by 20% , its resistance also increased by 1.5 times. How will the voltage sensitivity of the galvanometer by affected?

If the radius of a circle be increased by 3 times, then how many times its circumference will be increased ?

Show that if n identical conductors are joined in series, the combined resistance is n^2 times as great as when they are joined in parallel.

For n number of resistors of magnitude r connected in parallel, the equivalent resistance in R. What will be the value of the equivalent resistance when they are connected in series? Or, show that if n identical conductors are joined in series, the combined resistance is n^2 times as great as when they are joined in parallel.

When an iron wire of diameter 1 cm is copper plated uniformly. Resistance of iron reduces to 1/3 of its original value. Calculate the thickness of copper plating, Resistivities of copper and iron are 1.8 times 10^-6 Omega .cm and 1.98 times 10^-5 Omega .cm respectively.