Kerala SSLC 2022 Question Paper Physics

(Pages:6) S 1735
SI. No.

SSLC EXAMINATION, MARCH - 2022

PHYSICS
(English)
Time 12 Hours Total Score : 40

General Instructions to Candidates
There is a 'cool-off time' of 15 minutes in addition to the writing time. Use this time to get
familiar with questions and to plan your answers.
Questions with different scores are given as distinct parts.
Read the instructions caretully before answering the questions.
Keep in mind, the score and time while answering the questions.
The maximum score for questions from 1 to 24 will be 40.

PART I
A. Answer any four questions from 1 to 6. Each carries 1 score. 4x1=4

1. Find the relation between the terms in the first pair and complete the second pair. 1
Incandescent lamp : Tungsten
Heating coil of
heating appliances

2. Secondary coil of a transformer has double turns than that of its primary coil. If 1
the voltage applied in the primary coil is 25 V, what will be the voltage in
Secondary?
(25 V, 50 V, 2 V, 12.5 V)

3. The midpoint of a lens is known as. 1
(Optic centre, Principal focus, Centre of curvature, Principal axis)

4. If one Jóule of work is done to move,one coulomb of charge from one point to 1
another. What will be the potential difference between these points ?
(2V,3 V,1 V, 4 V)

5. Which arrangement converts the AC induced in the armature of DC generator 1
into DC?

6. When light passes through a medium it suffers partial and irregular reflection by 1
hitting the particles of the medium. Name this phenomenon.

P.T.O.

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B.
B. Answet all questions from 7 to 9. Each carries 1 score. 3x1-3

7. Which is the commercial unit of electrical energy ? 1

(ampere, kilowatt, kilowatt hour, volt)

8. Which rule helps us to find the direction of motion of a current carrying conductor 1
8.
placed ina magnetic field ?
Joule's law, Maxwell's right hand thumb rule, Fleming's left hand rule, Flemings
right hand rule)

The figure shows a beam of light falling on two different surfaces. 1
9.9.

Figure -1 Figure 2

Which type of reflection is represented by Figure - 1 ?

PART I I

A. Answer the following question. It carries 2 sco 1x2-2

10. When an object is placed in front of a concave mirror at a distance 60 cm. An 2

image is obtained on a screen at a distance of 30 cm from the mirror. Find focal
length of the mirror.

B. Answer any one question from 11 to 12. Each carries 2 score. 1x2-2

11. Write any two precautions to be taken to avoid electric shock. 2

Why does Newton's colour disc appears to be white, when it is rotated at high 2
12.
speed? Explain.

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PART III
A. Answer any three questions from 13 to 16. Each carries 3 score. 3x3-9
13.
The figure given below shows dispersion of white light when it passes through a

prism.

R

(a) Which colour deviates more?
(b) Which colour of the visible light has the longest wavelength?
c)During dispersion each colour has got different deviations. Why?

14. (a)What is the energy transformation taking place in a moving coil loud speaker ?
(6) Explain the working of a moving coil loud speaker. 2

15. Some characteristics of step up transformers and step down transformers are given 3
below. Select the statements suitable for step up transformers.
(a) Primary voltage is greater than secondary voltage.
(6) Secondary voltage is greater than primary voltage.
C) Current in the primary coil is greater than that in the secondarycoil.
(d) Current in the secondary coil is greater than that in the primarycoil
(e) Thick wires are used in the primary.
( Thick wires are used in the secondary.

16. When an object of height 5 cm is placed at a distance of 12 cm infront of a concave
mirror, a real image was formed at a distance of 24 cm.
(a) Calculate magnification (use New Cartesian Sign Convention) 1
(6) Find the height of the image. 1
() Based on magnification how can we predict whether the image formed is 1
erect or inverted.

B. Answer the following question. carries 3 score. 1x3-3
17. (a) Which among the following is not a discharge lamp? 1
(Sodium Vapour lamp, Arc lamp, Fluorescent lamp, LED lamp)
(b) Explain the working of discharge lamp. 2

P.T.O.

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PART IV
A. Answer any twoquestions from 18 to 20. Each carries 4 score. 2x4-8

18. Schematic diagram of a generator is given:

1
(a) Which type of generator is this? (AC/DC)
b) Name the parts of this generator marked as 1,2, 3,4 2

1:
2
3
4
() State the working principle of this device 1

19. Analyse the figure.

B

2
2F OF

An object is placed between F and 2F of a convex lens.

(a)Copy the diagram and complete to show the image formation. 2

6) Write any two features of the image formed here.
Where must the object be placed to get a real image of same size as that of
the object.

20. (a) What is meant by the term "energy crisis" ? 2
(b) Write any two reasons for energy crisis. Suggest two methods to minimise 2
it.

(ouyaseud,
u 3AI

kWh
meter

JG

T
D
Neutral line

Live line
Live line
Live line

N

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24. Observe the given circuits
6 ohms 6 ohms 6 ohms
W
wwT
ww
6 ohms

12 V 12 V
(A) (B)
Calculate the resutant resistance in Circuit (A) and Circuit (B).
(b) What is the intensity of electric current in Circuit (A) ?
the heat energy produced in Circuit (B) if current flows for
(Calculate
30 minutes.
2

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