Current Electri...

The e.m.f of a battery is 2 V and its internal resistance is 0.5 Ω. The maximum power which it can deliver to anyexternal circuit will be

Kirchhoff\'s I law and II law of current, prove the

Eels are able to generate current with biological cells called electroplaques. The electroplaques in an eel are arranged in 100 rows, each row stretching horizontally along the body of the fish containing 5000 electroplaques. The arrangement is suggestively shown below. Each electroplaque has an e.m.f. of 0.15 V and internal resistance of 0.25 Ω
The water surrounding the eel completes a circuit between the head and its tail. If the water surrounding it has a resistance of 500 Ω, the current an eel can produce in water is about

Current provided by a battery is maximum when

A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 hours. The mean terminal voltage during discharge is 14 V. The \"Watt-hour\" efficiency of the battery is

A capacitor is connected to a cell of e.m.f. E having some internal resistance r. The potential difference across the

When the resistance of 9 Ω is connected at the ends of a battery, its potential difference decreases from 40 volt to 30 volt. The internal resistance of the battery is

Two batteries, one of e.m.f. 18 volt and internal resistance 2 Ω and the other of e.m.f. 12 volt and internal resistance 1 Ω, are connected as shown. The voltmeter V will record a reading of

Two sources of equal e.m.f. are connected to an external resistance R. The internal resistances of the two sources are R₁ and R₂ (R₂> R₁). If the potential difference across the source having internal resistanceR₂ is zero, then

The magnitude of i in ampere unit is