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Physics - Current Electricity

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21. On a bulb is written 220 volt and 60 watt. Find out the resistance of the bulb and the value of the current flowing through it. (NTSE West Bengal, Stage-I, 2013-14)

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22. The value of current I and voltage V in the given circuit will be

(NTSE Rajasthan, Stage-I, 2013-14)

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23. Three equal resistors connected in series across a source of (V) voltage together dissipates 5 W power. If the same resistors are connected in parallel across the same source of voltage V, the power dissipated will be (NTSE Rajasthan, Stage-I, 2013-14)

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24. A uniform wire when connected directly across a 220 V line produces heat H per second. If the wire is divided into n-parts and all parts are connected in parallel across a 220 V line, the heat produced per second will be (NTSE Haryana, Stage-I, 2013-14)

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25. A circuit is shown in the figure. If switch'S' is closed, the reading of an ammeter(A)

(NTSE Andhra Pradesh, Stage-I, 2014-15)

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