Obtain how many turns of wire should the solenoid have

Reference no: EM13518062

A 20 cm-long solenoid carrying a current of 8mA is oriented with its axis parallel to earth's magnetic field, whose magnitude is 2.5×10-5 T. If there is NO net magnetic field inside, how many turns of wire should the solenoid have?

Reference no: EM13518062

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