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07. - Two identical cells of EMF 1.5 V each joined in parallel provide supply to an external circuit consisting of two resistors of 17 W each joined in parallel. A very high resistance voltmeter reads the terminal voltage of the cell to be 1.4 V. What is the internal resistance of each ce..

The current through a conductor is proportional to the potential difference between its ends, provided the temperature of the conductor remains consta..

It is found experimentally that the current I flowing through a conductor is directly proportional to the potential difference V across its ends, provided the physical conditions (temperature, mechanical strain, etc.,) remain constan..

Six lead-acid type of secondary cells, each of emf 20 V and internal resistance 0.015 W , are joined in series to provide a supply to a resistance of 8.5 W . Determine (i) the current drawn from the supply and (ii) it's voltag..

02. - Six lead-acid type of secondary cells, each of emf 20 V and internal resistance 0.015 W , are joined in series to provide a supply to a resistance of 8.5 W . Determine (i) the current drawn from the supply and (ii) it's voltag..

This is a portable form of Leclanche Cell. A moist paste of NH 4 Cl and ZnCl 2 is contained in a zinc vessel acting as the negative electrode. ZnCl 2 is added to the electrolyte NH 4 Cl. It keeps the paste moist because it is highly hygroscopic. The top is sealed with shellac or pitch so that paste..

The emission of particles from a hot filament was first discovered by Thomas Edison in 1883 but the effect was left unexplained until the discovery of the electron by J.J. Thomson in 1897. In Edison's experiment, he inserted a second filament in the evacuated bulb of a carbon filament lamp and foun..

Electric potential is the condition that determines the flow of charge. Electrical potential at a point in an electric field is defined as the amount of work done in bringing a unit of positive charge from infinity to that point. Electrical potential is a scalar quantity. The potential diff..

Electric potential is the condition that determines direction of flow of charge. Electrical potential at a point in an electric field is defined as the amount of work done in bringing a unit positive charge from infinity to that point. Electrical potential is a scalar quantity. The potential di..

It is found experimentally that the current I flowing through a conductor is directly proportional to the potential difference V across its ends, provided the physical conditions (temperature, mechanical strain, etc.,) remain constant. That ..