Magnetic Effects of Electric Current online mcq quiz
Magnetic Effects of Electric Current boostup points
➤ A compass needle behaves as a small magnet.
➤ It’s one end pointing towards north is called a north pole, and the other end pointing towards south, is called a south pole.
➤ The space around a magnet in which the force of attraction and repulsion due to the magnet can be detected is called the magnetic field.
➤ A field line is path along which a hypothetical free north pole would tend to move.
➤ The direction of the magnetic field at a point is given by the direction that a north pole placed at that point would take.
➤ Field lines are shown closer together where the magnetic field is greater.
➤ The magnetic field lines around a straight conductor carrying current are concentric circles.
➤ The direction of magnetic field is given by Right Hand Thumb Rule.
➤ The magnetic field inside a solenoid is similar to that of a bar magnet.
➤ Fleming’s left-hand rule gives the direction of magnetic force acting on a conductor.
➤ An electromagnet consists of a core of soft iron wrapped around with a coil of insulated copper wire.
➤ The phenomenon in which an electric current is induced in a circuit because of a changing magnetic field is called electromagnetic induction.
➤ Fleming’s right-hand rule is used to find the direction of induced current.
➤ Electric generators are based on the principle of electromagnetic induction and converts mechanical energy into electrical energy.
➤ Fuse is the most important safety device used for protecting the circuits due to short circuiting or overloading of the circuits.
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