Magnetism Week 15 MCQ's - Answer: 1 Question 7 Question:...

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Magnetism MCQ’s Week 15 Usama Farooq Question 1 Question: A magnetic field line is used to find the direction of 1 . south-north 2 . a bar magnet 3 . a compass needle 4 . magnetic field Answer: 4 Question 2 Question: Who first discovered the relationship between electricity and magnetism? 1 . Faraday 2 . Newton 3 . Maxwell 4 . Oersted Answer: 4 Question 3 Question: In an electric motor, the energy transformation is from 1 . electrical to chemical 2 . chemical to light 3 . mechanical to electrical 4 . electrical to mechanical Answer: 4 Question 4 Question: A commutator changes the direction of current in the coil of 1 a DC motor
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. 2 . a DC motor and an AC generator 3 . a DC motor and a DC generator 4 . an AC generator Answer: 3 Question 5 Question: Which of the following devices works on the principle of electromagnetic induction? 1 . Ammeter 2 . Voltmeter 3 . Generator 4 . Galvanometer Answer: 3 Question 6 Question: A device used for measuring small currents due to changing magnetic field is known as 1 . Galvanometer 2 . Ammeter 3 . Voltmeter 4 . potentiometer
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Unformatted text preview: Answer: 1 Question 7 Question: Electromagnetic induction is the 1 . charging of a body with a positive charge 2 . production of current by relative motion between a magnet and a coil 3 . rotation of the coil of an electric motor 4 . generation of magnetic field due to a current carrying solenoid Answer: 2 Question 8 Question: For making a strong electromagnet, the material of the core should be 1 . soft iron 2 . steel 3 . brass 4 . copper Answer: 1 Question 9 Question: You have a coil and a bar magnet. You can produce an electric current by 1 . moving the magnet but not the coil 2 . moving the coil but not the magnet 3 . moving either the magnet or the coil 4 . using another DC source Answer: 3 Question 10 Question: A fuse in an electric circuit acts as a 1 . current multiplication 2 . voltage multiplication 3 . power multiplier 4 . safety device Answer: 4...
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This note was uploaded on 01/17/2012 for the course MASS COMMU 107 taught by Professor Masror during the Spring '11 term at College of E&ME, NUST.

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Magnetism Week 15 MCQ's - Answer: 1 Question 7 Question:...

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