Malaysia SPM Form 5 Physics - Electromagnetism
1.1 Introduction to Magnetism 1.2Straight Wire and Coil 1.3 Solenoid 1.4 Uses of Electromagnet 2.1 Catapult Force 2.2 Application of Catapult Force	3.1 Electromagnetic Induction 3.2 DC and AC Generator 4.1 Transformer 4.2 Transformer - Calculation 5.1 Generation and Transmission of electricity

Electromagnet - Solenoid

The SPM Physics Workbook is developed under the One-School.net Free Books Project. The content of this book is strictly follow Malaysia SPM (Sijil Pelajaran Malaysia) syllabus. The aim of this project is to provide a complete electronic supplementary network for students to develop self-learning skills by breaking the spoon-feed rituals and to encourage them to compile educational information from the Internet.

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1. Which of the following materials is most likely to be used for the coil of an electromagnet?

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2. Which of the following materials is most likely to be used for the core of an electromagnet?

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3. Why iron is suitable to become a core of an electromagnet?

I because it is easily to be magnetized.
II because it is easily to be demagnetized.
III because it is a good conductor.
IV because it is a ferromagnetic material.

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4. Which diagram in the figure shows the magnetic field pattern associated with a solenoid carrying current in the direction indicated?

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5. Which diagram shows the magnetic field pattern associated with a solenoid carrying a current in the direction indicated?

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6. The figure shows a picture of solenoid. State the magnetic pole at X when the switch is closed.

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7. The figure shows two solenoids are placed near each other. What will happen if the switches are switched on?

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8. Which of the following methods can be used to increase the magnetic field strength of a solenoid?

I. Increases the current.
II. Increases the number of turns of wire of the solenoid.
III. Places a soft iron core in the solenoid.
IV. Use iron instead of copper as the wire of the solenoid.

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9. The figure shows a metal core placed in a solenoid. The metal becomes a permanent magnet after the switch is on for 30 minutes. Which metal is the core possible made of?

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10. Which of the following statements is true regarding an electromagnet?

I. Electromagnets generate electric field around the conductor.
II. Electromagnet is a permanent magnet.
III. The strength of the magnetic field of an electromagnet can be adjusted easily.
IV. Electromagnet can produce electromagnetic wave.

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11. The figure shows two iron rods is placed in a solenoid. What will happen when current is allow to flows in the solenoid?

Magnetic Field
A magnetic field is a region in the surrounding of a magnet which a magnetic material experiences a detectable force.

Malaysia SPM Form 5 Physics - Electromagnetism

Electromagnet - Solenoid