Questions in Current Electricity

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	Kirchoff’s I law and II law of current, proves the
	In the circuit, the reading of the ammeter is (assume internal resistance of the battery be zero)
	In the circuit, if the internal resistance of the battery is 1 ohm, then what is the reading of ammeter
	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 electroplaques has an emf of 0.15 V and internal resistance of $0.25 \Omega$. The water surrounding the eel completes a circuit between the head and its tail. If the water surrounding it has a resistance of $500 \Omega$, 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
	In the given current distribution what is the value of I
	A capacitor is connected to a cell of emf E having some internal resistance r. The potential difference across the
	When the resistance of $9 \Omega$ 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
	The maximum power drawn out of the cell from a source is given by (where r is internal resistance)

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