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When a magnetic compass is placed near a circuit in which an electric current is flowing, its needle deflects. Why?
An electromagnet is used in the electric bell. Give reason.
Maxwell's right-hand thumb rule shows the direction of the magnetic field produced when an electric current flows through a straight wire. Explain.
Maxwell's right-hand grip rule to find the direction of magnetic field lines of force around a solenoid. Explain.
What is the magnetic effect of current?
How can the magnetic field produced around straight current carrying be demonstrated by using iron dust, cardboard, and conducting straight wire? Explain it.
Draw the magnetic field developed around a straight current-
carrying wire.
What is a Solenoid? Draw a picture showing the magnetic field developed around a solenoid.
Write two uses of the solenoid.
A permanent magnet cannot be used in the electric bell, why?