A sensitive microphone cannot withstand currents greater than 0.05 A when connected across a thermocouple of emf 8.5 m V , the current in a very low resistance ammeter placed in series in the circuit reads 34 mA. What is the resistance of the microphone?

A battery or emf 10 V and internal resistance 3 Omega is connected to a resistot. If the current in the circuit is 0.5 A, what is the resistance of the resistor ?

A resistance of 97 Omega is connected to a battery of emf 10 V . To measure the current passing in the circuit, an ammeter is inserted in series with the resistance. It is found that the ammeter reads 100 mA. What is the internal resistance of the battery if 2 Omega is the resistance of ammeter ?

A battery of emf 12 V and internal resistance 3 Omega is connected to a resistor. If the current in the circuit is 0.5 A, Calculate resistance of resistor.

When a resistance of 2 Ohm is connected across the terminals of a cell, the current is 0.5 A. If a resistance of 5 Ohm is connected across the cell then the current is 0.25 At the emf of the cell is:

When a resistance of 2 Omega is connected across the terminals of a cell, the current is 0.5 A. When resistance is increased to 5 Omega , the current is 0.25 A. the emf of the cell is

When a resistance of 2 ohm is connected across terminals of a cell, the current is 0.5 A . When the resistance is increased to 5 ohm, the current is 0.25 A The e.m.f. of the cell is

When a resistance of 2 ohm is connected across terminals of a cell, the current is 0.5 A . When the resistance is increased to 5 ohm, the current is 0.25 A The e.m.f. of the cell is

When a resistance of 2 ohm is connected across terminals of a cell, the current is 0.5 A . When the resistance is increased to 5 ohm, the current is 0.25 A The e.m.f. of the cell is