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

DC and AC Generator

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1. The diagram above shows the simple structure of a
Choice 1 DC motor
Choice 2 DC Generator
Choice 3 AC Motor
Choice 4 AC Generator

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2. What is the name of component Y in the diagram.
Choice 1 slip ring
Choice 2 split ring commutator
Choice 3 armature
Choice 4 rectifier

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3. The diagram shows a generator rotating in a clockwise direction. Which of the following statements about the generator is true?
Choice 1 Y is a slip ring
Choice 2 The galvanometer shows a constant reading.
Choice 3 The current in the coil changes direction every half rotation.
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4. Diagram shows the simple structure of a
Choice 1 DC motor
Choice 2 DC Generator
Choice 3 AC Motor
Choice 4 AC Generator?

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5. Name component Y in the diagram above
Choice 1 Split ring commutator
Choice 2 Carbon brush
Choice 3 slip ring
Choice 4 armature

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6. The diagram shows a generator rotating in a clockwise direction. Which of the following statements about the generator is not true?
Choice 1 The current in the coil always flows in 1 direction.
Choice 2 The current in the resistor changes direction in every half revolution of the coil.
Choice 3 The pointer of the galvanometer oscillates about the zero center.
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7. The diagram shows an a.c. generator rotating in a clockwise direction. A maximum current will be obtained when the coil is
Choice 1 Horizontal
Choice 2 Vertical
Choice 3 45o with the horizontal
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electromagnetism notes