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GUJRANWALA GURU NANAK PUBLIC SCHOOL,LUDHIANA
CLASS X –PHYSICS
ASSIGNMENT – MAGNETIC EFFECTS OF CURRENT
1. What does crowding of magnetic field lines indicate?
2. At what place of the magnet are the magnetic field lines denser?
3. How is the strength of the magnetic field around a wire related to the strength of electric
current flowing in the wire?
4. How many times does AC used in India change direction in one second?
5. What do you understand by current rating of electric fuse?
6. A student while studying the force experienced by a current carrying conductor in a magnetic
field records the following observations:
(a) The force experienced by the conductor increases as the current is increased.
(b) The force experienced by the conductor decreases as the strength of the magnetic field is
increased.
Which of the two observations is correct and why?
7. State the rule to determine the direction of force experienced by a current carrying conductor in
a magnetic field. How will this force get affected on:
(i)
Doubling the magnitude of current
(ii) reversing the direction of current flow
8. What is solenoid? Draw magnetic field lines showing magnetic field in and outside the current
carrying solenoid.
9. What is electromagnet? Write uses of an electromagnet. Draw labeled diagram to show how it
is made.
10. Name few alloys used for making permanent magnets.
11. Draw magnetic field lines of the field produced due to current carrying(a) straight conductor
(b)Circular loop (c) solenoid
12. Which effect of the electric current is utilized in the working of an electric fuse?
13. Draw a schematic diagram of a domestic circuit which has a provision of a main fuse, meter ,
bulb, and a switch/socket.
14. (a) Why do we connect earth wire in a house? .Give reasons
(b)What type of current is used in household supply?
(c) What type of current is given by cell?
(d) To which wire do you connect fuse-wire in a household circuit?