Physics - Class X - Chapter No.17 - Questions And Answers

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MAGNETISM AND ELECTROMAGNETISM

IMPORTANT QUESTIONS OF PAST PAPERS:

1)  Define
    (i) Electromagnet (2009)
    (ii) Magnetic field (2011)
2)  What is an electromagnet? Illustrate it with a labeled diagram and also write its two
uses? (2010)
3)  Draw a labelled diagram of an electric bell. (2011) OR
    ◾ With the help of a labelled diagram. explain  the construction and working of an electric bell. (2013) OR
    ◾ Draw diagram of an electric bell and describe its working . (2015) OR
    ◾ Write the construction and working of electric bell with diagram? (2017)
4)  What is an ammeter? How galvanometer is is changed into an ammeter? Also state
how an ammeter is connected in an electrical circuit? (2013)
5)  How can we convert a galvanometer into ammeter and voltmeter? Also draw relevant
diagram) (2018) OR
    ◾ How is a galvanometer converted into ammeter and voltmeter?(Show only by
labeled diagram) (2014)
6)  Define electric motor and write down two factors on which its speed depends? (2014, 2007)
    ◾What are simple electric motors? Write down its construction and working with diagram.(2019)
7)  Write the name of three elements by which magnets are artificially made by their
alloy and also write three modern uses of magnet? (2015)
8)   Write four similarities of static electricity and magnetism? (2010, 2016)
9) Give Scientific reason:
(a) Why is an ammeter, low resistance connected in parallel with the coil of  galvanometer? (2019)

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Notes By Practical Center