Magnetic Field and Field Lines
Physics ⇒ Electricity and Magnetism
Magnetic Field and Field Lines starts at 8 and continues till grade 12.
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See sample questions for grade 11
A bar magnet is placed on a table. If you sprinkle iron filings around it, what pattern will you observe?
A solenoid is 0.5 m long and has 1000 turns. If a current of 2 A flows through it, calculate the magnetic field inside the solenoid. (µ₀ = 4π × 10-7 T·m/A)
A student observes that the magnetic field lines are denser at the poles of a bar magnet than at the center. What does this indicate about the field strength at these locations?
Calculate the magnetic field at the center of a circular coil of radius 0.1 m carrying a current of 5 A. (µ₀ = 4π × 10-7 T·m/A)
Describe the pattern of magnetic field lines around a pair of bar magnets placed with their unlike poles facing each other.
Explain why two magnetic field lines never intersect each other.
If the current in a straight conductor is reversed, what happens to the direction of the magnetic field around it?
If the current through a solenoid is tripled, what happens to the magnetic field inside the solenoid?
If the magnetic field at a point is directed from east to west, in which direction will the north pole of a compass needle point at that location?
Name the scientist who first observed the pattern of magnetic field lines using iron filings around a bar magnet.
State the direction of magnetic field lines inside a bar magnet.
State the law that relates the magnetic field around a current-carrying conductor to the current and distance from the conductor.
State the SI unit of magnetic field strength.
What is the effect on the magnetic field strength inside a solenoid if the number of turns per unit length is doubled, keeping the current constant?
