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 12
A circular coil of radius 0.05 m has 20 turns and carries a current of 3 A. Calculate the magnetic field at its center. (μ₀ = 4π × 10⁻⁷ T·m/A)
A proton moves perpendicular to a uniform magnetic field. What is the shape of its path?
A solenoid has 1000 turns per meter and carries a current of 2 A. Calculate the magnetic field inside the solenoid. (μ₀ = 4π × 10⁻⁷ T·m/A)
A student places a compass near a current-carrying wire. The needle deflects. What does this indicate about the space around the wire?
Calculate the magnetic field at a distance of 0.1 m from a long straight wire carrying a current of 5 A. (μ₀ = 4π × 10⁻⁷ T·m/A)
Describe the effect on the magnetic field inside a solenoid if the current is doubled.
Describe the pattern of magnetic field lines around a straight current-carrying conductor.
Describe what happens to the magnetic field lines when two like poles of bar magnets are brought close together.
Explain why magnetic field lines are denser at the poles of a bar magnet.
Explain why the magnetic field inside a solenoid is nearly uniform.
State one difference between electric field lines and magnetic field lines.
State the right-hand thumb rule for determining the direction of the magnetic field around a current-carrying wire.
