Current Electri...

The current in a simple series circuit is 5.0 A, When an additional resistance of 2.0 Ω is inserted, the current drops to 4.0 A. The original resistance of the circuit in ohm was

A battery of emf 2 V and internal resistance 0.1Ω is being charged by a current of 5 A. The potential difference between the terminals of the battery is

An energy source will supply a constant current into, the load, if its internal resistance is

The n rows each containing m cells in series are joined in parallel. Maximum current is taken from this combination across an external resistance of 3Ω resistance. If the total number of cells used are 24 and internal resistance of each cell is 0.5 Ω, then

The figure shows a network of currents. The magnitude of current is shown below.The current I will be

A galvanometer has current range of 15 mA and voltage range 750 mV. To convert this galvanometer into an ammeter of range 25 A, the required shunt is

The daniel cell is balanced on 125 cm length of a potentiometer. Now, the cell is short circuited by a resistance of 20 and the balance is obtained at 100 cm. The internal resistance of the daniel cell is

An ammeter and a voltmeter of resistance R are connected in series to an electric cell of negligible internal rsistance. Their reading are A and V respectively. If another resistance R is connected in parallel with the voltmeter, then

In a potentiometer of a cell of emf 1.25 V gives balancing length of 30 cm.If the cell is replaced by another cell, balancing length is found to be 40 cm. What is the emf of second cell?

What is the value of shunt resistance required to convert a galvanometer of resistance 100Ω into an ammeter of range 1 A? Given, full scale deflection of the galvanometer is 5mA