Class
9th,10th Federal Board 2009
Paper:Physics
(Objective Type) Time
Allowed: Max.Marks:
Note:Use this
paper to write the answers to the objective questions.No marks will
be awarded for cutting,over-writing
or using a pencil.This paper must be tagged with the answer-book.
1- Insert correct option.
(17)
(i) If an object is placed in front
of a convex lens between F and 2F, What will the image be ?
(a)
Real and smaller in size
(b)
Virtual and greater in size
(c)
Real and greater in size
(d)
Virtual and smaller in size
(ii) In a P-type semi-condductor , nearly
whole of the current flows due to:
(a)
Electrons
(b) Holes
(b)
Protons
(d) Positrons
(iii) Centrel of gravity of the body shown
in the figure lies below the fulcrum. What is this state called?
(a)
Stable equilibrium
(b)
Unstable equilibrium
(c)
Neutral equilibrium
(d)
Sim,ple equilibrium
(iv) The engine of a bus moving on a road suddenly
stops but continues its motion. What is it due to?
(a)
Inertia
(b) Force
(c)
Momentum
(d) Potential energy
(v) What is the apparatus in the figure
used for finding?
(a)
Heat of reaction (b) Specific
heat
(c)
Expansion
(d) Density of liquids
(vi) The liquids transmit external pressure
equally in all directions. What is this phenomenon known as?
(a)
Archimedes principle
(b) Hooke's Law
(c)
Pascal's Law
(d) Boyle's Law
(vii) An observation recorded during an experiment
was 0.04053 cm. How many significant figures are there
in it?
(a) 5
(b) 4
(c) 3
(d) 6
(viii) What is the mechanical advantage of an inclined
plane?
(a) h
(b) sin 0
1
(c) 1
(d) R
h
r
(ix) An electric circuit is given in the figure.
What current will flow through it?
(a)
10A
(b) 5A
(c)
4A
(d) 2A
(x) When strings of a cataoult are pulled,
What type of energy is stored in it?
(a)
Kinetic
(b) Gravitational potential
(c)
Elastic potential
(d) Chemical potential
(xi) Amongst the following, which is the unit
of capacitance?
(a)
Coulomb
(b) Volt
(c)
Farad
(d) Watt
(xii) What will the centripetal force become if velocity
of a body moving on a circle is doubled?
(a)
Two times
(b) Six times
(c)
1/2 time
(d) Four times
(xv) The shape of the lines of magnetic force in
case of a striaght current carrying conductor is:
(a)
Elliptical
(b) Triangular
(c)
Circular
(d) Spherical
(xvi) The wavelength of a wave passing through a
medium is 0.2m.If wave speed is 4ms-1,what is the frequency
of the wave?
(a)
8 Hz
(b) 20 Hz
(c)
40 Hz
(d) 50 Hz
(Subjective)
2- Attempt
any fourteen parts.
(14x3=42)
(i) What bis the name of the Muslim
scientist who worked in the field of optics? Describe
any four of
his discoveries.
(ii) How can you say that the motion
of asimple pendulum is simple harmonic? Explain
brifly. Write
the formula for finding the time period of a simple pendulum.
(iii) Give two examples of derived units and
explain how they are derived from base units.
(iv) A metallic body AB is placed on an insulated
stand . If a positively charged sphere is
brought near
its end A. what type of charge will be produced on the end B? why?
(v) Before firing, the momentum of a
gun with a bullet, is zero . How will you explain that
momentum of
the system remains zero when the gun is fired?
Write the law
of conservation of momentum.
(vi) When we beat a drum forcefully a
loud sound is produced. Explain-why? Write names
of the factors
on which loudness of the sound depends.
(vii) In the figure what does the point represent
? Write its definition with respect to the
figure.
(viii) Electrostatic is being used in applying paints
on the surface of different articles. This
method is very
effective and cheap. Explain why?
(ix) The given graph represents distance 's'
covered by a car during time "t".
a. What will be the distance covered
after 7s?
b. After how many seconds will
the car cover a distance of 45m?
c. Write the scale used on the
x-axis.
(x) Velocity of a car is 100 Kmh-1 in
the direction of 30 with the x-axis, Draw representative
line of this
velocity.
(xi) A motorcycle is moving with a velocity
of 72 Kmh-1. suddenly brakes are applied. If it cover a
distance of 20m before
it stops them, calculate the acceleration of the motorcycle.
(xii) A body is hung by two wires as shown in the
figure. Find the weight of the body.
(xiii) What rule does D.C Motor work on? Define the rule.
(xiv) A player throws a ball of mass 400g with a velocity
of 30ms-1. Find the kinetic energyof
the ball.
(xv) What is ohm's Law? Derive its eqyuation.
(xvii) Differentiate between P-type and N-type semiconductor,
Give one example for each of
nthe two Why
does current easily flow through N-type material?
(xviii) Define inertia. What is the unit of weight? Write its
definition also.
(xix) derive the formula for finding the heat absorbed
or released by a body, on changing its
temperature.
Attempt
any two Questions.
(2x13=26)
3.a- What is an artificial satellite?
Write two advantages of these satellites.
b- Derive the formula
for the speed of an artificial satellite.
c- Given figure shows
an artificial satellite orbiting the earth. Find the centripetal
force acting on it.
7.8km-1
m-6 x 10 kg
d- Define centripetal
force.
4.a- Define uniform acceleration, velocity,
rotatory motion and displacement.
b- Prove the equation:
2aS=vf 2-Vi 2
c- A ball is thrown
vertically upwards with a velocity of 40ms-1. Determine the maximum
height which the
ball will attain and time to reach the maximum height.
5.a- Copy the diagram on your answer sheet and
point out the following:
(a) Angle of
deviation
(b) Angle of
refraction
(c) Angle of
incidence
(d) Refracted
ray
b- Define the angle of minimum deviation
, linear magnification and refractive index.
c- What is an optical fibre? Write
three of its uses. |
