CBSE PHYSICS: MAGNETIC EFFECTS OF ELECTRIC CURRENT FA-1
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Questions Paper- I
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MARKS-30
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TIME- 70 MINUTES |
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Instructions:
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Questions : 1 to 5 – 1 Mark each
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Questions : 6 to 9 – 2 Marks each
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Questions : 10 to 13 – 3 Marks each
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Question 14 – 5 Marks
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1. State
two uses of permanent magnets.
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2. Does
a neutron moving in a magnetic field experience a force. Why?
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3. State
Fleming’s right hand rule.
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4. What are the
functions of live and neutral wire in domestic circuit?
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5. Electricians
wear rubber shoes while working. Why?
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6. Give
four basic properties of magnets.
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7. Define
SI unit of magnetic field. Under what condition does a moving charge
experience i) Maximum force ii) Minimum
force
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8. Draw toe field
line around the bar magnet along its length on its two sides and mark
the field directions on them by arrow marks.
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9. Why do
we use power supply of two different current rating at our home?
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10. Write an activity
to show that current carrying wire behaves like a magnet.
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11.Match the
following
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A
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B |
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i) Electromagnet
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a)
Convert electric energy to mechanical energy |
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ii) Electric motor
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b) Convert mechanical energy to
electrical energy |
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iii) Electric
generator
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c) Strong magnet |
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12. Name three
factors on which force produced due to magnetic field depends.
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13.What is an
electric fuse? What material is used for fuse wire?
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14. a) Write
the principle of electric motor.
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b) Explain
the construction and working of electric motor briefly.
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c) Draw a labelled
diagram of electric motor.
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