# Kerala SSLC Physics Model Question Paper 1 English Medium

Students can Download Kerala SSLC Physics Model Question Paper 1 English Medium Pdf, Kerala SSLC Physics Model Question Papers helps you to revise the complete Kerala State Board New Syllabus and score more marks in your examinations.

## Kerala SSLC Physics Model Question Paper 1 English Medium

General Instructions:

1. The first 15 minutes is the cool off time. You may – use the time to read and plan your answers.
2. Answer the questions only after reading the instructions and questions thoroughly.
3. Questions with marks series 1, 2, 3 and 4 are categorized as sections A, B, C and D respectively.
4. Five questions are given in each section. Answer any four from each section.
5. Answer each question by keeping the time.

Time: 1½ Hours
Total Score: 40 Marks

Section – A

Answer any four questions. Each question carries 1 score. [4 x 1 = 4]

Physics Focus Area Model Question Paper Question 1.
Select 2 forms of coal from the given.
(Coal tar, Paraffin, Anthracite, Lignite)
Anthracite, lignite

Sslc Physics Model Question Paper 2020 Question 2.
Find the relation between the first pair and complete the second.
Generator: Mechanical energy → Electrical energy Moving coil microphone ______.
Sound energy → Electrical energy

Sslc Physics Focus Area Questions And Answers Question 3.
Which is the correct figure?

Sslc Physics Focus Area Based Questions And Answers Question 4.
Why is Nichrome not used as filament in electric bulbs?
Nichrome does not emit white light, instead it stays on red hot condition.

Sslc Physics Focus Area Model Question Paper Question 5.
Figures shows a ray of light obliquely travel from air to glass. Find out the correct one.

it bends towards the normal.

Section – B

Answer any 4 questions. Each question carries 2 score. [4 × 2 = 8]

Sslc Physics Focus Area Based Questions Question 6.
Complete the figure then find out the principal focus of the concave lens.

Sslc Physics Focus Area Based Model Question Paper Question 7.
Write two advantages of nichrome which are made used in electric heating appliances.
High resistivity and high melting point.

Hss Live Guru Model Question Paper Question 8.
What are the properties that a good fuel must have?
Should be easily available.

Sslc Focus Area Physics English Medium Question 9.
Terms related to lens are given below? Complete the questions using these terms?
(Pole, Focal length, Centre Of curvature, Principal axis)
a) The midpoint of a lens is called
b) The distance between pole to focus is called ______.
c) The centre of imaginary spear of two sides of the lens is called _______.
d) Imaginary line passing through the centre of curvature of the lens is called _______.
a) Pole
b) Focal length
c) Centre of curvature
d) Principal axis

Sslc Physics Focus Area Pdf Question 10.
A motor cyclist sees the image of a car coming behind as $$\frac{1}{6}$$ of its original size in the rear view mirror. If the real distance between the bike and car is 30 cm, Calculate the radius of curvature of the rear view mirror.
u = -30 m, v=? R =?
m = $$\frac{-v}{u}$$
v = -mu
v = $$\frac{-1}{6}$$ × -30m
v = 5m

f =6m
R = 2f
R = 2 × 6m
R = 12 m

Section – C

Answer any 4 questions. Each question carries 3 score. [4 × 3 = 12]

Sslc Physics Focus Area English Medium Question 11.
A burning candle is placed in front of a convex lens to obtain an image on the screen.
Find out the positions of the object in each of the conditions given below?
a) We get the size of the image is equal to the size of the object.
b) The size of the image is smaller than that of the object.
c) We get large .real image than the object.
a) 2F or C
b) Beyond 2F or Beyond C
c) In between 2F and F (in between C and F)

Physics Focus Area Question Paper Question 12.
Nature of some images are given below. Find out the real and virtual images and then write it in separate column.
a) Inverted image
b) Do not obtained on a screen
c) Obtained on a screen
d) If the light rays really intersect to each other.
e) Erect image
f) The image distance cannot directly measured.
Real images : a, c, d
Virtual image : b, e, f

Focus Area Sslc Physics English Medium Question 13.
A convex lens of focal length 15 cm, it is used to obtain an image on the screen. The size of the images is twice the size of the object.
a) Find out the distance between lens to object?
b) Find out the distance between lens to image?
a) f = + 15cm
m = -2 (convex lens create real images so its magnification is negative.

2u = -45
u = -22.5 cm

b) v = -2u
= -2 × -22.5 = 45 cm

Sslc Focus Area Physics Question Paper Question 14.
1) What is the energy transformation in a solar panel?
2) Why is it said that solar panel is an electronic device?
3) Explain photo voltaic effect.
1) Light energy → electrical energy
2) The important part of a solar panel is a P-N junction diode made up of silicon, so it is an electronic device.
3) When solar energy fall so on N-side of a solar cell, a small electric current is obtained due to the flow of electrons to P region from N-region. This phenomenon is called photovoltaic effect

Sslc Physics Questions And Answers English Medium Question 15.
A thin copper wire is freely suspended between the pole pieces of a U shaped magnet.

a) When current flows through the circuit, what energy change will be taken place in this arrangement?
b) What is the reason behind this change?
c) Which rule helps to explain this change?
a) The conductor moves
b) One magnetic field experiences force on another magnetic field.
C) Fleming’s left hand rule.

Section – D

Answer any 4 questions. Each question carries 4 score. [4 × 4 = 16]

Focus Area Sslc English Medium Physics Question 16.
What is BLEVE?
Owing to the excess heat, the LPG becomes gas increasing the pressure inside. The ability to expand is 250 times for the gaseous LPG Therefore when LPG becomes gas, the container cannot accommodate the entire gas. This increases the pressure to a very high level causing a huge explosion. This is known as BLEVE (Boiling Liquid Expanding Vapour Explosion).

Question 17.
Image formation of an eye is given below, but the object is placed in different distances from the eye.

a) In which position images termed in our eye in the above two cases.
b) How image is formed on the retina in this two cases explain?
a) Formed on the retina
b) Ciliary muscles changes the curvature of the eye lens by itself. So its focal length changes periodically, depends upon the position of the object present in front of the eye. Therefore image distance V cannot changes.

Question 18.
An object is placed 20 cm away from the convex lens, a virtual and erect image is formed 100 cm away from the lens.
a) Find out the focal length of the lens?
b) What is the power of the lens?
(a) u = -20 cm
v = -100 cm

(b) f = + 25 cm

Question 19.
Observe the figure and answer the following questions

a) In which mode, the rheostat and resistor are connected in the circuit?
b) If the resistance of the rheostat is 50 Ω, what is the current in the circuit?
c) In this occasion, if the circuit is turned on, for 5 minute, calculate the heat generated?
a) Series connection mode

b) R = 10Ω + 50Ω = 60Ω
I = $$\frac{V}{R}$$
I = $$\frac{6}{60}=\frac{1}{10}$$ A = 0.1A

c) H = IθRt
H = IVT = 0.1 × 6 × 300 = 180 J

Question 20.
The schematic diagram represents an image formation of a distant object in the eye.

a) Which eye defect can you identify from this figure?
b) What is the reason for this defect?
c) Which lens is used to solve this problem?
d) How this lens is used to solve this problem?