9th:
Physics Time:15
Mins
Marks: 12
OBJECTIVE TYPE
Q.
No.1: Choose the right answer. (12x1=12)
i. Which of the following
is not a derived quantity?
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a.
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Length
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b.
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Electric
current
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c.
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Time
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d.
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Speed
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ii. Ampere is SI unit of:
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a.
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Length
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b.
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Electric
current
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c.
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Time
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d.
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Speed
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iii. 1hp = ?
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a.
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674
W
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b.
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764
W
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c.
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746
W
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d.
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647
W
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iv. A car
starts from rest. It acquires a speed of 25ms-1after 20s. The
distance moved by the car during this time is:
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a.
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31.25
m
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b.
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250
m
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c.
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500
m
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d.
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5000
m
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v. SI unit of “g” is:
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a.
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ms-1
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b.
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kgms-1
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c.
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ms-2
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d.
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kgm2s-2
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vi. Mass of the body is measured by:
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a.
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Spring
balance
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b.
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Screw
gauge
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c.
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Electronic
balance
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d.
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Meter
rule
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vii. On Kelvin scale, freezing point of ice is:
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a.
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0K
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b.
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32K
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c.
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273K
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d.
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373K
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viii. Fs = ?
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a.
|
mg
|
b.
|
R
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c.
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Kg
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d.
|
 |
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ix. Metals are good conductor of heat due to:
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a.
|
Free
electrons
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b.
|
Big
size of their molecules
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c.
|
Small
size of their molecules
|
d.
|
Rapid
variations of their atoms
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x. Rooms are heated using gas heaters by:
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a.
|
Conduction
only
|
b.
|
Convection
& radiation
|
c.
|
Radiation
only
|
d.
|
Convention
only
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xi. Which of the following
is unit of momentum?
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a.
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Nm
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b.
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Ns
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c.
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kgm-1
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d.
|
Both
b & c
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xii. If the velocity of a body moving in a circle is doubled then
required centripetal force will become:
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a.
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Double
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b.
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Half
|
c.
|
Four
times
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d.
|
One
third
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SUBJECTIVE TYPE
9th: Physics Time:1
Hrs 45 Mins
Marks:
48
Q.
No.2: Give answers of the
following. (Any five) (5x2=10)
i.
|
Define
variable speed with graph.
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ii.
|
Define
significant figure with an example.
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iii.
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Differentiate
between circular and rotator motion.
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iv.
|
Differentiate
between base and derived units with an example of each.
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v.
|
Speed
of sprinter is 8.33ms-1. Find time taken to cover 100m.
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vi.
|
Convert
72kmh-1 into ms-1.
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vii.
|
Can
a body moving with constant speed have acceleration? Justify your answer with
proper reasoning.
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viii.
|
Define
Graph.
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Q.
No.3: Give answers of the
following. (Any Five) (5x2=10)
i.
|
Define
pitch of screw gauge. Write its formula and value.
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ii.
|
Differentiate
speed and velocity.
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iii.
|
Define
centripetal acceleration. Write its formula an unit.
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iv.
|
State
second condition of equilibrium.
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v.
|
Define
watt.
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||
vi.
|
Write
use of solar cell.
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vii.
|
Describe
Einstein mass energy equation.
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viii.
|
A
force of 10N is making an angle of 300 with the horizontal. Find
Horizontal component of force.
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ix.
|
Why
the height of racing car is kept low?
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Q.
No.4: Give answers of the
following. (Any
five) (5x2=10)
i.
|
Calculate
density of 5 liter of water having mass 5kg.
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ii.
|
Define
pressure and its SI unit.
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iii.
|
What
are thermal climbers?
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iv.
|
State
principle of floatation.
|
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v.
|
Write
uses of bimetallic strip.
|
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vi.
|
Write
effect of surface area on the rate of evaporation.
|
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vii.
|
Convert
100 0F into 0C.
|
||
viii.
|
What
is meant by Anomulas expansion of water.
|
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Note: Attempt
any 2 Questions: (9x
2 = 18)
Q. 5:
(a). Define
rest and motion and explain them as relative quantities. (05)
(b). A train starts from rest. It moves
through 1km 10 100s with uniform acceleration. What will be its speed at the
end of 100s? (04)
Q.
6: (a). State
and explain second law of motion. (05)
(b). The
starring of a car has radius 16cm. find torques produced by a couple of 50N. (04)
Q.
7: (a). Resolve
a force into its rectangular components. (05)
(b). A force acting on a body of mass 5kg
produces on acceleration of 10ms-2. What acceleration the same force
will produce in a body of mass 8kg? (04)