Magnetic Effects of Electric Current
Gujarat Board · Class 10 · Science
Flashcards for Magnetic Effects of Electric Current — Gujarat Board Class 10 Science. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is a magnetic field?
Answer
A magnetic field is the region surrounding a magnet where the force of the magnet can be detected. It is represented by magnetic field lines, which show the direction and strength of the magnetic fiel…
What are magnetic field lines and what do they represent?
Answer
Magnetic field lines are imaginary lines that represent the magnetic field around a magnet. They emerge from the north pole and merge at the south pole. The closeness of field lines indicates the stre…
State three important properties of magnetic field lines.
Answer
1. They emerge from north pole and merge at south pole 2. They form closed curves (inside magnet, they go from south to north) 3. No two field lines ever intersect each other 4. Closer field lines ind…
What was Oersted's discovery and why is it important?
Answer
In 1820, Hans Christian Oersted discovered that a compass needle gets deflected when an electric current passes through a nearby metallic wire. This showed that electricity and magnetism are related p…
What is the pattern of magnetic field around a straight current-carrying wire?
Answer
The magnetic field around a straight current-carrying wire forms concentric circles centered on the wire. The field becomes weaker as we move away from the wire. The direction is given by the right-ha…
State the right-hand thumb rule.
Answer
Hold a current-carrying straight conductor in your right hand such that your thumb points in the direction of current. Your fingers will wrap around the conductor in the direction of the magnetic fiel…
How does the magnetic field strength vary with distance from a current-carrying wire?
Answer
The magnetic field strength decreases as the distance from the current-carrying wire increases. This is why the concentric circles representing the field become larger and more spaced out as we move a…
What happens to the magnetic field when current through a wire is increased?
Answer
When the current through a wire is increased, the magnetic field strength also increases. The deflection of a compass needle placed near the wire increases, showing that the magnetic field is directly…
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