A cell of negligible internal resistance is connected to a tangent galvanometer and the deflection produced is `30^(@)`. If theree such cells are connected in series and the combination is connected to the same galvanometer, the deflection will be

A battery of e.m.f. 12V and internal resistance 2Omega is connected in series with a tangent galvanometer of resistance 4Omega . The deflection is 60^@ when the plane of the coil is along the magnetic meridian. To get a deflection of 30^@ , the resistance to be connected in series with the tangent, galvanometer is :

A battery of emf 12 V and internal resistance 2Omega is connected in series with a tangent galvanometer of resistance 4Omega . The deflection is 60^@ when the plane of the coil is along the magnetic meridian . To get a deflection of 30^@ , the resistance to be connected in series with the tangent galvanometer is

A battery of emf 12 V and internal resistance 2Omega is connected in series with a tangent galvanometer of resistance 4Omega . The deflection is 60^@ when the plane of the coil is along the magnetic meridian . To get a deflection of 30^@ , the resistance to be connected in series with the tangent galvanometer is

Current is sent through a galvanometer of resistance 50 Omega from a battery of emf 30V and of negligible internal resistance.There is a shunt of resistance 2 Omega connected in parallel with the galvanometer.Find out the resistance that should be connected in series with the battery to get a current of 10mA through the galvanometer.

The resistance of the coil of a tangent galvanometer is 60Omega . It is connected to a battery of negligible internal resistance. The deflection is found to be 60^(@) . Now a shunt resistance of 30Omega is connected across the coil of the tangent galvanometer. The deflection produced will be

A galvanometer of resistance 5 Omega is connected in series with a resistance of 0.2Omega to a battery of negligible internal resistance. The deflection is noted. If the 0.2Omega resistance is replaced by 2 Omega resistance, the value of shunt resistance to be connected to the galvanometer to maintain the same deflection is

The deflection of a galvanometer falls to 1//10^(th) when a resistance of 5Omega is connected in parallel with it. If an additional resistance of 2Omega is connected in parallel to the galvanometer, the deflection is

The deflection of a galvanometer falls to 1//10^(th) when a resistance of 5Omega is connected in parallel with it. If an additional resistance of 2Omega is connected in parallel to the galvanometer, the deflection is

An accumulator of emf 2 V and negligible internal resistance is connected across a uniform wire of length 10 m and resistance 30 Omega The appropriate terminals of a cell of emf 1.5 V and internal resistance 1 Omega is connected to one end of the wire and the other terminal of the cell is connected through a sensitive galvanometer to a slider on the wire. What is the length of the wire that will be required to produce zero deflection of the galvanometer? How will the balancing length change? (a) When a coil of resistance 5Omega is placed in series with the accumulator. (b) The cell of 1.5 V is shunted with 5 Omega resistor?