Kerala SSLC Physics Model Question Papers with Answers Paper 2

Kerala SSLC Physics Previous Question Papers with Answers Paper 2 are part of Kerala SSLC Physics Previous Year Question Papers with Answers. Here we have given Kerala SSLC Physics Previous Question Papers with Answers Paper 2.

Kerala SSLC Physics Previous Year Question Papers with Answers Paper 2 Free Download English Medium

Time Allowed: 1 1/2 hours
Cool off time: 15 Minutes
Maximum Marks: 40

Instructions

• First 15 minutes is cool off time.
• Answer the questions only after reading instructions and questions thoroughly.
• Questions are given in A, B, C, D sections. Write only 4 questions from each section.
• Score allotted for sections A, B, C, D are 1, 2, 3 and 4 respectively.

 Questions

SECTION A

Question 1. In which of the following the specific value of LPG is represented in current unit
a. 55000 KJ/hr
b. 55000 KJ/s
c. 55000 KJ/kg
d. 55000 KJ/g

Question 2.
Using the relation from the first pair, complete the other.
Heat: Joule:: Power:__

Question 3.
What are the energy changes taking place in a moving coil microphone?

Question 4.
Which electric component is used for following symbol?

Question 5.
Name the process by which the components of coal are separated?

SECTION – B

Question 6.
Correct the underlined part of the following statements appropriately if it is wrong.
a. Sound getting reflected repeatedly from different object is called echo.
b. Reverberation is the persistence of sound as a result of resonance.

Question 7.
Three different colours are allowed to fall on a white wall.
a. Which are the colours indicated by A and B ?
b. Find out a complementary colour from the picture?

Question 8.
Identify the occasions in which step down transformers are used in the power transmissions.

Question 9.
In a house 7 CFL Lamps each of 20W, 4 CFL Lamps each of 15 W works for 4 hours daily. What will be the consumption of electricity per day.

Question 10.
Classify the energy from the following sources as green energy and brown energy.

SECTION – C

Question 11.

a. Write the type of the wave? What is the wavelength of this wave?
b. If 256 Hz is the frequency of a sound wave find its speed. (The velocity of sound on air 340 m/s).

Question 12.
a. List out four advantages of nanotechnology.
b. Which characteristics of nano particle is utilized in nanotechnology?

Question 13.
a. Joule’s law is related to the heat produced in a conductor when electricity passes through it. Express the law mathematically?
b. When 5A electricity passed through a conductor for five minutes it produces 750000 J heat energy. Find the resistance of conductor.

Question 14.
The figure shows a ray of light fulling obliquely on a drop of water in atmosphere.

a. Copy the diagram and complete it showing the internal reflection and refraction.
b. How does the sunlight appears as rainbow in water droplets?

Question 15.
Give two reasons for energy crisis. How can be it solved.

SECTION – D

Question 16.
Latent heat of fusion of ice is very high.
a. What is the unit of latent heat of fusion ?
b. What is meant by Latent heat of fusion ?
c. Write down two applications of high latent heat of fusion of ice.

Question 17.
Observe the circuit A and B shown below.

a. If current through 40W bulb in the circuit A is 0.6 A What is the current through 100 W bulb in the same circuit.
b. Which among the above two circuit is suitable for house hold electric connection?
c. What are the advantages of using above circuit for house hold electric connection?

Question 18.
The loudness of sound becomes maximum at resonance.
a. What is meant by resonance ?
b. Write the name of an instrument used to demonstrate the resonance of air column
c. Explain the mechanism by which sound propagates through air.

Question 19.
Blue colour of sky is due to the phenomenon of scattering.
a. What is meant by scattering ?
b. How is Tyndal effect related to above phenomenon ?
c. What are die advantages of using infrared photography ?
d. In which colour does sky appear when viewed from moon ?

Question 20.
Primary of a transformer has 20,000 turns and the secondary has 30,000 turns. 160 V AC is applied at the primary of the transformer.
a. What is the voltage available at secondary of the above transformer?
b. If the number of turns in the secondary transformer is greater than that in the primary then more voltage is induced in the secondary. Why?
c. How much power must be supplied to the primary of the transformer so that 500W power is obtained from secondary?

Answers

Answer 1.
55000 KJ/kg

Answer 2.
Watt

Answer 3.
Sound energy is changing to electrical energy

Answer 4.
Capacitor

Answer 5.
Distillation process

Answer 6.
a. Sound getting reflected repeatedly from different object is called multiple reflection.
b. Reverberation is the persistence of sound as a result of multiple reflection.

Answer 7.
a. A – White lights
B – Green
b. Yellow+Blue

Answer 8.
Step up transformers are used at the power stations. Electricity is produced in 11 kV. Then it transferred in to 33kV, 66kV, 110kV and 220kV. From substation by using step down transformers it reduced to 230V.

Answer 9.
20 W CFL Lamps = 7 × 20 = 140
15 W CFL = 4 × 15 = 60
The electricity consumed by 20 W CFL

Answer 10.

Answer 11.
a. Transverse wave
Wavelength BF or DH
b. The distance traveled by a wave in one seconds is its speed
v = fλ v = 340m/s
f = v/λ. f = 256Hz
λ = vf = \(\frac { 340 }{ 256 }\) = 1.33 m

Answer 12.
a 1. Long lasting tennis ball
2. Display screens which are lighter.
3. Can make paint and varnish.
4. Highly efficient batteries.
b. The ratio of surface area to the volume increases beyond a limit on changing them into nano size. Subsequently the physical properties of substances also change very much.

Answer 13.
a. H = I²Rt
H = Heat produced
I = Intensity of electric current.
R = Resistance
t = Time
b. H = I²Rt
H = 750000 J
I = 5A
t = 5 x 60 sec

Answer 14.
a.

b. All the water droplets of the same colours appear to be in the same are of the circle. The red colour is at the outer edge and violet colour is at the inner edge. All the other colours are seen in between depending on their wavelengths.

Answer 15.
The reasons for energy crisis
Increase of population
Urbanization
For solve these problems
Find new sources of energy sources.
Use solar energy, energy from wind etc.

Answer 16.
a. J/kg
b. Latent heat of fusion of a solid is the quantity of heat absorbed by 1kg of the solid to change into its liquid state at its melting point without change in temperature.
c. 1. Glaciers do not melt as a whole at the same time.
2. Ice cream does not melt fast.

Answer 17.
a. 0.6A
b. Fig B
c. 1. All the bulbs burn as per the power marked on them.
2. Bulbs can be controlled individually using switches.
3. The bulbs will get the required voltage.
4. The same voltage is available for all the bulbs.

Answer 18.
a. Two objects are said to be in resonance if the natural frequency of the body undergoing vibration is the same as that of the influencing body.
b. Resonance column
c. Sound travel in the form of longitudinal waves.(Particles of the medium vibrate in a direction perpendicular to the direction of propagation of the wave.)

Answer 19.
a. Irregular and partial reflection of light is called scattering.
b. When rays of light pass through a colloidal fluid or suspension, the tiny particles get illuminated due to scattering. Due to this the path of light is made visible.This phenomenon is called Tyndal effect.
c. Since Infrared radiations have high wave length they do not get lost on scattering. Hence they can travel longer distances in the atmosphere.
d. Appears dark

Answer 20.
a. Np = 20000
Ns = 3000

b. The number of turns and voltage is directly proportional.
c. 500W

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