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(A) : A loosely round helix made of stiff wire is suspended vertically with the lower end just touching a dish of mercury. When a current is passed through the wire, the helical wire executes oscillatory motion with the lower end jumping out of and into the mercury. (R) : When electric current is passed through helix, a magnetic field is produced both inside and outside the helix. |
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Answer» Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'. |
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