What happens to the magnetic field if the current in a wire loop is increased?
Increasing the current increases the strength of the magnetic field around and at the center of the loop.
What factors affect the strength of the magnetic field around a current-carrying wire?
The magnetic field strength increases with a higher current and decreases as you move farther from the conductor.
Why do magnetic field lines never intersect?
Magnetic field lines never intersect because if they did, it would mean the magnetic field has two directions at the same point, which is physically impossible.
What is the Right-Hand Thumb Rule, and how is it used?
The Right-Hand Thumb Rule is used to determine the direction of the magnetic field around a straight current-carrying conductor. Point your right-hand thumb in the direction of the current, and your fingers will curl in the direction of the magnetic field lines.
How can we detect the magnetic field around a current-carrying conductor?
A magnetic field around a conductor can be detected using a compass or by observing how iron filings arrange themselves around the conductor.
Who discovered the magnetic effect of electric current, and when?
Hans Christian Oersted discovered in 1820 that an electric current can produce a magnetic field, revealing the relationship between electricity and magnetism.
What is the magnetic effect of electric current?
When an electric current flows through a conductor, it creates a magnetic field around it. This magnetic effect is the basis for devices like electromagnets, electric motors, and generators.
How does a fuse work using the heating effect of electric current?
A fuse works by using a thin wire with a low melting point. When excessive current flows through the fuse, the wire heats up due to the heating effect and melts, breaking the circuit and preventing damage to appliances.
What are some applications of the heating effect of electric current?
Applications of the heating effect include electric heaters, electric irons, toasters, fuses, and filament bulbs. These devices convert electrical energy into heat energy for useful purposes.
Why do electric appliances like heaters use high-resistance materials?
High-resistance materials, like nichrome, are used in electric heaters because they generate more heat when current flows through them. This is because the heat produced is directly proportional to the resistance of the material.
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