Electromagnetism Worksheet
A Grade 12 physics worksheet covering key concepts in electromagnetism, including magnetic fields, electromagnetic induction, and related calculations.
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Electromagnetism Worksheet
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Read each question carefully and provide your best answer. Show all your work for calculation problems.
1. Which of the following statements is true regarding magnetic field lines?
They originate from the south pole and end at the north pole.
They cross each other at points of strong magnetic field.
The density of field lines indicates the strength of the magnetic field.
They are purely hypothetical and have no physical significance.
2. According to Faraday's Law of Induction, a changing magnetic flux through a coil induces:
A constant electric current.
An electromotive force (EMF).
A permanent magnetic field.
Only heat energy.
1. The force experienced by a current-carrying conductor in a magnetic field is given by the formula F = I L B sinθ, where F is the force, I is the current, L is the length of the conductor, B is the magnetic field strength, and θ is the angle between the current direction and the magnetic field. This is known as the law.
2. A transformer works on the principle of induction.
1. State Lenz's Law and explain its significance in electromagnetic induction.
2. Describe the right-hand rule for determining the direction of the magnetic field around a current-carrying wire.
1. Electromagnets are temporary magnets whose magnetic field can be turned on or off.
True
False
2. The strength of a magnetic field produced by a solenoid is directly proportional to the number of turns per unit length and the current flowing through it.
True
False
1. A straight wire 0.5 m long carries a current of 10 A. It is placed in a uniform magnetic field of 0.2 T at an angle of 30° to the field. Calculate the magnetic force acting on the wire.