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Q23 of 216 Page 478

A strip of copper was placed in a beaker containing zinc sulphate solution. On observing the strip next day, was there any colour change in the strip?

The zinc sulphate solution is colourless, when a copper strip is placed inside it, there is no colour change observed as zinc is more reactive than the copper as per the activity series.


Cu(s) + ZnSO4 (aq.) No reaction.


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21

i. Two identical resistors each of resistance 10Ω are connected in

A. Series


B. Parallel to a 6 V battery


Calculate the ratio of power consumed in the combination of resistors in two cases.


ii. Draw the circuit diagram of the two cases.


Ans. i. 4 : 1

22

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24

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OR


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25

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Questions · 216
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