Download SA1 REVISION WORKSHEET 2

Buds Public School, Dubai
PHYSICS Revision Worksheet
Name:________________________
Class:10
Sec:___
1. Define the term ‘resistivity’ of a material.
2. Define S.I. unit of magnetic field. Under what condition does a moving charge
experience:
(i) maximum force (ii) minimum force
3. Two electric lamps of 100 W and 25 W respectively are connected in parallel
to a supply voltage of 200 V. Calculate the total current flowing through the
circuit..
4. (a) What is overloading? Why does a fuse wire melt on overloading?
(b) Why does short-circuit lead to the fuse wire burning?
5. Compare and contrast Biomass and Hydroelectricity as source of energy.
6. (a) A current carrying aluminium rod AB is placed in a magnetic field. The
direction of magnetic field is vertically upward. How do we think the
displacement of rod AB will be affected if:
the current in the rod AB is increased.
a stronger horseshoe magnet is used.
length of the rod AB is increased?
7. How does a solenoid behave like a magnet? Can you determine the north and
south poles of a current carrying solenoid with the help of bar magnet?
8. List the properties of magnetic lines of force.
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 at a
point directly above it?
9. Draw the patterns of magnetic field lines through and around a current carrying
solenoid. What does the magnetic field pattern inside the solenoid indicate?
(A)How can this principle be utilized to make an electromagnet?
(B) State two ways by which strength of this electromagnet can be increased?
10. (a) With the help of an activity, explain the method of inducing electric
current in a coil with a moving magnet. State the rule used to find the direction
of electric current thus generated in the coil.
(b) Two circular coils P and Q are kept close to each other, of which coil P
carries a current. What will you observe in Q:
(i) if current in the coil P is changed.
(ii) if both the coils are moved in the same direction with the same speed?
Give reason.
11.(a) Calculate the resistance of the wire using the graph.
(b) How many 176
line?
(c) Define electric power. Derive relation between power, potential difference
and resistance.
12.Find the equivalent resistance across the two ends A and B of the circuit given
below
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