Three charges q 2q and 4q are linked by strings assume that, Ask an Expert

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Q. Three charges, +q, +2q, and +4q, are linked by strings (Assume that the middle charge is fixed in space and the other 2 charges are held there by the tension alone.):

Find out the tensions T1 and T2.

Q. A step-up transformer has 300 turns on its primary coil and 90,000 turns on its secondary coil. If the current flowing by the secondary is 0.5 amps, what is the current flowing in the primary?

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