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In a large building, there are 15 bulbs of 40 W5 bulbs of 100 W5 fans of 80 W and 1 heater of 1 kW. The voltage of the electric mains is 220 V. The minimum capacity of the main fuse of the building will be

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Important Questions on Current Electricity

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When 5 V potential difference is applied across a wire of length 0.1 m, the drift speed of electrons is 2.5×10-4 m s-1. If the electron density in the wire is 8×1028 m-3, the resistivity of the material is close to
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In the circuit shown below, the current in the 1 Ω resistor is

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A galvanometer having a coil resistance of 100 Ω gives a full-scale deflection, when a current of 1 mA is passed through it. The value of the resistance, which can convert this galvanometer into an ammeter giving a full-scale deflection for a current of 10 A, is 

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The temperature dependence of resistance of Cu and undoped Si in the temperature range 300-400 K is best-described by

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In the above circuit, the current in each resistance is,

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Which of the following statements is false?
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When a current of 5 mA is passed through a galvanometer having a coil of resistance 15 Ω, it shows full-scale deflection. The value of the resistance to be put in series with the galvanometer to convert it into voltmeter of range 0-10 V is
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On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The resistance of their series combination is 1 . How much was the resistance on the left slot before interchanging the resistances?