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A
E 906 Ph
SAMAGRA SHIKSHA, KERALA
ANNUAL EVALUATION 2018-19
PHYSICS
Instructions
- First 15 minutes is given as cool off time. This time is to be spent for reading and understanding the questions.
- Answer the questions based on instructions.
- Answer the questions according to score and time.
1.
Identify the relation between the first pair and complete the second.
A floating ship
: Archimedes principle
An excavator
: ……………………….
(1)
2.
If 0.8 coulomb of charge flows through a conductor in 2 second the current will be
(1)
3.
Which among the following can be the possible value of ‘g’ at the poles of the earth
(1)
4.
Name a star which is seen in orange colour ……………………….
(1)
5.
From the following, which graph is related to Ohm’s law?
(1)
(A)
(B)
(C)
(D)
6.
The symbol of a device which regulates the current in a circuit is
a)Name the device.
(1)
b)
Which principle is used to design this device?
(1)
7.
‘Orion’ is a constellation used to find out direction.
a)
Name any other purposes for which our ancestors observed the stars.
(1)
b)
Write the name of another constellation that was observed for finding the direction.
(1)
A E 906 Ph – 1/4
8.
Kilogram weight (kgwt) is a unit of weight.
a)
Express the value of 1 kgwt in newton.
(1)
b)
Which device is used to measure weight?
(1)
9.
A magnetic needle is arranged below the conductor and parallel to it as shown.
a) In which direction does the north pole of this magnetic needle move?
(Clockwise / Anti clockwise)
(1)
b)
Write the reason for the deflection of magnetic needle?
(1)
10.
Complete the table.
| Voltage (V) |
Current I (A) |
Resistance R ($\Omega$) |
|---|---|---|
| 8 | (a) |
4 |
| 12 | 3 | (b) |
i)
Find the values of a and b?
(1)
ii)
State the law helped you in completing the table.
(1)
11.
A stone of mass 100 g is dropped from the top of a tower. It takes 2 s to reach the ground. (g = 10 m/s2)
a)
Calculate the height of the tower.
(1)
b)
Evaluate the potential energy possessed by the stone when it is at the top of the tower?
(1)
c)
Evaluate the kinetic energy of the stone when it just touches the ground?
(1)
12.
The resistance of a copper wire and an aluminium wire of same length and thickness are different.
a)
Name the property of the substances responsible for this difference.
(1)
b)
Define this property.
(1)
c) Select the factors affecting this property from the following.
(Length, Area of cross section, Temperature)
(1)
13.
Stars have birth and death.
a)
From where do stars born?
(1)
b)
Energy is produced in stars by nuclear fusion. Explain how the conditions for this energy production is achieved?
(2)
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14.
The figure shows the pictorial depiction of a loud speaker.
a)
Identify the parts A and B.
(1)
A B
b)
What energy transformation is taking place in this device?
(1)
c)
Name the basic principle of its working.
(1)
15.
The picture shows Fleming’s left hand rule. Choose appropriate terms from the box that is represented by a, b and c.
(3)