write an experiment to identify the polarity of a solenoid using the followin materials supplied. solenoid with 50turns, magneticcompass, 3V battery, rheostat and switch.
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Current in solenoid produces a stronger magnetic field inside the solenoid than outside. The field lines in this region are parallel and closely spaced showing the field is highly uniform in strength and direction. ... Reversing the direction of the current reverses the direction of the magnetic field.
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