Section: - I ( 20 Marks )
Attempt all questions from this section
Q.1) Answer the following
a) Name the S.I units of 2
i) Linear Momentum ii)Electric Current
b)A body of mass 1.50 kg is dropped from the 2nd floor of a building which is at a height
of 12 m .What is the force acting on it during its free fall ? ( g = 9.80 m/s2 2
c)When an arrow is stretched from a bow ,it has kinetic energy in it .Explain briefly from
where does it get its kinetic energy ? 2
d) State the two laws of reflections 2
e) State two uses of plane Mirror 2
Q.2) Answer the following
a) There is no atmosphere on moon .Can you hear each other on moon’s surface ?Give
reason to your answer. 2
b) Define when current flowing through a conductor is said to be 1 ampere 2
c) Name the three constituents of an atom and state the nature of charge on each of them.
d) Define newton the S.I unit of force .2
e) Distinguish between primary cell & secondary cell.2
Q.3) Answer the following
a) Explain the term Induced magnetism 2
b)State the condition when the work done by the body is 2
i) positive ii) negative
c) State the characteristics of the medium required for propagation of sound. 2
d) State the properties of ultrasound that make it useful.2
e) The fig represents a negatively charged gold leaf electroscope .Label the parts A,B,C
and state whether each is an insulator or a conductor
Q.4) Answer the following
a) Draw a neat & labeled diagram of a wave representing displacement, 2
amplitude &time
b) Calculate the acceleration produced in a body of mass 50g when acted upon by a force
of 20 N 2
c)Define the terms i) Uniform circular Motion
ii) Potential Energy 2
d) State the energy changes in the following cases while in use
i) microphone ii) bio-gas burner
e) State the law of conservation of energy.Give one example.
Section II ( 30 Marks )
Q.5) Answer the following
a) A boy of mass 40 kg runs upstairs and reaches the 8m high first floor in 5 sec calculate i) the force of gravity acting on the boy ii) the work done by him against gravity 3
b) Draw a diagram to show the reflection of a ray of light using a 2M
plane mirror. Label the incident ray & reflected ray
Q.6) Answer the following
a) Define Transverse wave’s .Give any four properties of Transverse waves 3M
b) A body of mass 1.50 kg is dropped from a height of 10m. What is the force
acting on it during its fall ? g = 10 m/s2 2M
Q.7) Answer the following
a) State & Explain in detail the three factors on which the resistance 2M
of a Conductor depends
b) In the electric circuit shown in figure label the different parts A, B, C, D 3M
E,F & name them
Q.8) Answer the following
a) Prove that force = rate of change of momentum 3M
b) State the effect of force applied on a i) non-rigid body ii) rigid body 2M
Q.9) Answer the following
a) Calculate the acceleration produced in a body of mass 50g when acted 2M
upon by a force of 20 N.
b)What do you understand by the term neutral point? Explain with the help 3M
of suitable figure .
Q.10) Answer the following
a) Name three constituents of an atom and state the nature of charge on 2M
each of them
b) Two bodies of masses in ratio 1:2 are dropped from the same height. 3M
Find the ratios of the forces acting on them during motion