An ammeter and a milliameter are converted from the same galvanometer. Out of two which current measuring instrument has smaller resistance?

A galvanometer having a resistance of 50Ω gives a full scale deflection for a current of 0.05 A. The length in meter of a resistance wire of area of cross section 3×10^−3 cm^2 that can be used to convert the galvanometer into an ammeter which can read a maximum of 5A current is [specific resistance of the wire =5×10^−7 Ωm]

Two resistances of 5 ohm and 10 ohm are connected in parallel and then a current is passed through them from a battery of 6 volt. Calculate the currents drawn from the battery and also the currents flowing through each of the resistances.

In a potentiometer experiment, it is found that no current passes through the galvanometer, when the terminals of a cell are connected across 50 cm of the potentiometer wire. If the cell is shunted by a resistance of 5 ohm, the balance point is found at 40 cm of the wire from the same end. Find the internal resistance of the cell.

A metallic solid sphere and a hollow sphere of same material and external radius are heated to the same temperature and allowed to cool in the same environment .Which of the two has aa greater cooling rate?

A Square and a rectanglar field with measurements as given in the figure have the same perimeter. Which filed has a larger area?

A square and a rectangular field with measurements a given in the figure have the same perimeter, which field has a larger area?

(Attempt any three of the following questions) State Kirchhoff's (i) Junction rule and (ii)Loop rule. Determine the equivalent resistance of the network given below and the total current going out of the battery. Given, each resistor has resistance of 1omega .