Download SA1 REVISION WORKSHEET 3

BUDS PUBLIC SCHOOL, DUBAI
PHYSICS WORKSHEET
TOPIC- Magnetic Effects Of Electric current
Name:________________________
Class:10
Sec:___
I Very Short Answer Type Questions
1. What is the frequency of an alternating current if its direction changes after
0.01S?
2. How can it be shown that a magnetic field at a point near a wire related to the
strength of the electric current flowing in a wire?
3. Name the physical quantity whose SI unit is Wb-m2. I sit a scalar quantity or
vector quantity.
4. How will the Magnetic field intensity at the centre of a circular loop carrying
current change, if the current through the coil is doubled and the radius is reduced
into half?
5. What will happen when a current carrying conductor is placed in a perpendicular
magnetic field?
II Short Answer Type Questions
1. Differentiate between short circuiting an overloading of electric circuits. How
does a fuse wire protect an electric circuit?
2. What is the difference between direct and alternating currents? Write advantage
of using alternating current?
3. With the help of neat diagram describe how you can generate induced current in
a coil.
4. Draw the pattern of field lines due to solenoid carrying current. Mark north and
south pole in the diagram.
5. A current carrying conductor experiences a force when it placed in a magnetic
field? Give two application of this? Under what conditions is this force maximum?
6. What is an electromagnetic induction? Write the rule that is used to find the
direction of induced current.
7. Write the use of split rings, brushes, armature (coil with shaft) in a electric
generator.
8. A current through a horizontal power line flows in east to west direction. What
is the direction of magnetic field at a point directly below it and directly above it?
9. State the rule to determine the direction of a
(a) Magnetic field produced around a straight conductor carrying current.
(b) Force experience by a current carrying straight conductor placed in a magnetic
field which is perpendicular to it.
© Current induced in coil due to its rotation in magnetic field.
III Long Answer Type Questions
1. (a) Draw a schematic diagram of a domestic electric circuit which includes a
main fuse, power meter, a distribution box and power plugs.
(b) Why is it necessary to earth the metallic electric appliances?
2. (a) Draw a labelled diagram to show how an electromagnet is made.
(b)What is the purpose of the soft iron core used in making an electromagnet?
©Name the materials used to make permanent magnets
(d)State any two uses of permanent magnets.
********************************************