ICSE Board Class 10 Physics Sample Papers 2009

ICSE Board Sample Papers 2009 for Class 10 Physics

Sample Paper – 2009
Class – X
Subject –  Physics

General Instructions
1.  Section I is compulsory. Attempt any four questions from Section II.
2.  The intended marks for questions or parts of questions are given in brackets.

SECTION I (40 Marks)
Attempt all questions from this Section

Question 1
(a) Mention any two differences between the mass and weight of a body.

(b) State the amount of work done by an object when it moves in a circular path for one

(c) A uniform metre scale is kept in equilibrium when supported at the 60 cm mark and a
mass M is suspended from the 90 cm mark as shown in the
figure. State with reasons, whether the weight of the scale is greater than, less than or
equal to the weight of mass M.

(d) Draw a graph showing the relationship between acceleration and mass for a constant
force.

(e) The speed*time graph of a moving car is as shown in the figure below:*
Calculate :* (i) the distance covered by the car in 5 seconds.
(ii) the acceleration of the car

Question 2
(a) (i) Draw a labelled diagram to show the various components of a step*down
transformer.
(ii) State the main difference between a step*up and step*down transformer.

(b) (i) In winter, the weather forecast for a certain day was 'severe frost'. A wise farmer
watered his yields the night before to prevent frost damage to his crops. Why did he
water his fields?
(ii) 10125 J of heat energy boils off 4.5 g of water at 1000C to steam at 1000C. Find
the specific latent heat of steam.

(c) Define the term 'Work function' of a metal.

Question 3
(a) What will an alpha particle change into when it absorbs:]
i. One electron;
ii. Two electrons?

(b) Some hot water was added to three times its mass of cold water at 100C and the
resulting temperature was found to be 200C. What was the temperature of the hot water?

(c) Calculate the value of the resistance which must be connected to a 159 resistance to
provide an effective resistance of 69.

(d) Why are burns caused by steam more severe than those caused by boiling water at
the same temperature?

(e) Mention two important properties of a metal that make it a good thermionic emitter.

Question 4
(a) State two advantages of an electromagnet over a permanent magnet.

(b) Calculate the amount of heat released when 5.0 g of water at 200C is changed intoice at 00C.
(Specific heat capacity of water = 4.2 J/g0C Specific latent heat of fusion of ice = 336 J/g).

(c) Mention three factors on which the resistance of a wire depends.

(d) A certain radioactive nucleus emits a particle that leaves its mass unchanged but
increases its atomic number by one. Identify the particle and write its symbol.

SECTION II (40 Marks)
Attempt any four questions from this Section.

Question 5
(a) Show that for the free fall of a body, the sum of the mechanical energy at any point in
its path is constant.

(b) Name the type of single pulley that can act as a force multiplier. Draw a labelled
diagram of the above named pulley.

(c) A pulley system has a velocity ratio of 4 and an efficiency of 90%.
Calculate :*
i. the mechanical advantage of the system.
ii. the effort required to raise a load of 300 N by the system.

Question 6
(a) PQ and PR are two light rays emerging from the object P as shown in the figure
below:*
i. What is the special name given in the angle incidence (PQN) of ray PQ?
ii. Copy the ray diagram and complete it to show the position of the image of the
object P when seen obliquely from above.
iii. Name the phenomenon that occurs if the angle of incidence PQN is increased
still further .

(b) When a tuning fork, struck by a rubber pad, is held over a length of air column in a
tube, it produces a loud sound for a fixed length of the air column.
i. Name the above phenomenon.
ii. How does the frequency of the loud sound compare with that of the tuning fork?
iii. State the unit for measuring loudness[3].
(c) Give one use and frequency of each of the electromagnetic radiations given below:
(i) Microwaves

Question 7
(a) A radar is able to detect the reflected waves from an enemy aeroplane, after a time
interval of 0.02 milliseconds. If the velocity of the waves is 3 × 108 ms*1, calculate the
distance of the plane from the radar.

(b) A piece of ice is heated at a constant rate. The variation of temperature with heat
input is shown in the graph below:
a. What are represented by AB and CD ?
b. What conclusion can you draw regarding the nature of ice from the alongside
graph?

(c) If there is no heat loss to the surroundings, the heat released by the condensation of
m2g of ice at, 00C into water at 00C.
(i) Find:
i. the heat lost by steam in terms of m1
ii. the heat gained by ice in terms of m2.
(ii) Form a heat equation and find the ratio of m2 : m1 from it.
(Specific latent heat of vaporization of steam = 2268 kJ/kg;
Specific latent heat of fusion of ice = 336 kJ/kg.
Specific heat capacity of water = 4200 J/kg0C).

Question 8
(a) With reference to the diagram given below, calculate: The equivalent resistance
between P and Q.
i. The equivalent resistance between P and Q.
ii. The reading of the ammeter.
iii. The electrical power between P and Q.

(b) The diagram shows a coil connected to a centre zero galvanometer G. The
galvanometer shows, a deflection to the right when the N*pole of a powerful magnet is
moved to the right as shown:
i. Explain, why the deflection occurs in the galvanometer?
ii. Does the direction of the current in the coil appear clockwise or anticlockwise
when viewed from the end A?
iii. State the observation in G when the coil is moved away from N.
iv. State the observation in G when, both the coil and the magnet, are moved to the
right at the same speed.

Question 9
(a) In a laboratory experiment for finding specific latent heat of ice, l00 g of water at 30°C
was taken in a calorimeter made of copper and of mass 10 g. When 10 g of ice at 0°C
was added to the mixture and kept within the liquid till the ice melted completely, the final
temperature of the mixture was found to be 20°C.
i. What is the total quantity of water in the calorimeter at 200C?
ii. Specific heat capacities of water and copper being 4.2 J/g0C and 0.4 J/g0C
respectively, what quantity of heat would each release in cooling down to 200C from the initial stage?
iii. Write an expression for the heat gained by ice on melting.
iv. Calculate the value of the latent heat of fusion of ice from the data discussed
above.

(b) Electrical power P is given by the expression: P = (Q × V) / time
i. What do the symbols Q and V represent?
ii. Express 'Power' in terms of current and resistance explaining the symbols used
therein.

Question 10
(a) (i) Define a kilowatt hour. How is it related to the joule?
(ii) How can the work done be measured when force is applied at an angle to the
direction of displacement?

(b) (i)What is the main energy transformation that occurs in:
i. Photosynthesis in green leaves;
ii. Charging of a battery.
(ii) Write an expression to show the relationship between mechanical advantage, velocity
ratio and efficiency for a simple machine.

(c) A block and tackle pulley system has a velocity ratio 3.
i. Draw a labelled diagram of this system. In your diagram, indicate clearly the
points of application and the directions of the load and effort.
ii. Why should the lower block of this pulley system be of a negligible weight?

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