VR Tour For Std. 10 Ch. 13. Magnetic Effects of Electric Current
What's Included in Virtual tour of this chapter
Any substance that attracts iron and iron-like objects is defined as a magnet. Magnetic field lines are imaginary lines. Magnetic field lines are a visual tool used to represent magnetic fields. They describe the direction of the magnetic force on a north monopole at any given position. We will learn about the rule of Right-hand thumb. According to Fleming’s left-hand rule, the direction of the force on the conductor depends upon the direction of current and the direction of the magnetic field. The principle of the electric motor is based on the fact that a current-carrying conductor produces a magnetic field around it.
Virtual tour 1: Magnetic lines and Magnetic fields create in a simple electric circuit
Magnetic field lines arise from the North Pole and end into the south pole of the magnet. They are closed curves. Field lines never intersect with each other. The direction of magnetic field lines inside the magnet is from south to north.
Virtual tour 2: Right-hand Thumb rule
To find out the direction of the magnetic field, induced by the current-carrying conductor, we use the Right-Hand Thumb Rule. According to this rule, if you hold a current-carrying conductor in your right hand such that the thumb points in the direction of the current the fingers enclosing the wire indicate the direction of magnetic lines of force.
Virtual tour 3: Solenoid
The solenoid is a coil of many circular turns of insulated copper wire wrapped closely in a cylindrical form. When we pass current through the solenoid, it generates a magnetic field and behaves like a bar magnet.
Virtual tour 4: Fleming’s left-hand rule
We will understand Fleming’s left-hand rule. All we have to do is Stretch the thumb, forefinger, and middle finger of the left hand such that they are mutually perpendicular. If the forefinger is in the direction of the magnetic field, the middle finger in the direction of the current, then the thumb will point in the direction of motion or force. The magnitude of the force is the highest when the direction of current is at right angles to the direction of the magnetic field.
Virtual tour 5: Electric motor
A motor is a device that converts electrical energy into mechanical energy. A motor works on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it. A force acts on the coil which rotates it continuously. A current-carrying conductor placed perpendicular to the magnetic field experiences a force.
Virtual tour 6: Electromagnetic induction
The phenomenon in which electric current is induced in a conductor by varying magnetic fields is called electromagnetic induction. The magnetic field may change due to a relative motion between the coil and a magnet placed near the coil. If the coil is placed near a current-carrying conductor, the magnetic field may change either due to a change in the current through the conductor or due to the relative motion, between the coil and conductor.
Virtual tour 7: Electric generator
In this virtual tour, we will learn about the workings of an electric generator. In an electric generator, mechanical energy is used to rotate a conductor in a magnetic field to produce electricity. A generator converts mechanical energy into electrical energy. It works on the basis of electromagnetic induction.