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Physics Notes for MCAT, Physics notes for ECAT.
Physics Notes for MCAT, Physics notes for ECAT.
1.
|
A
ball tied to a string is swinging along a horizontal circle,the tension in
the string is minimum at
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|||||||
a)
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Top
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b)
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Mid way
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c)
|
bottom
|
d)
|
Same
at each point
|
|
2.
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The
ratio of dimensions of angular to linear momentum
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|||||||
a)
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[M]
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b)
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[ML-1]
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c)
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[T]
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d)
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[L]
|
|
3.
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If
the centripetal force required to a body in a circle of radius r is F1 ,if
the same body has to move in circle of half radius then centripetal force
will be
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|||||||
a)
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2F1
|
b)
|
4F1
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c)
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F1/2
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d)
|
None
of these
|
|
4.
|
If
the angle between Pakistan and Egypt is 120 ,a geostationary satellite is now
at Pakistan sight ,then after how long it will seen on eygpt sight
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|||||||
a)
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6
hours
|
b)
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8 hours
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c)
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12 hours
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d)
|
never
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|
5.
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If
a satellite need less critical velocity,then it has oto orbit at
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|||||||
a)
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Low height
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b)
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Greater height
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c)
|
No effect on height
|
d)
|
None
of these
|
|
6.
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On
a rotating body ,points on different distances do not have same
|
|||||||
a)
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θ
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b)
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α
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c)
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ώ
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d)
|
ac
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|
7.
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If
a body is moving in a vertical circle then its angular displacement has
direction
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|||||||
a)
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Along the
tangent
|
b)
|
Perpendicular
to axis of rotation
|
c)
|
Along the axis
of rotation
|
d)
|
None
of these
|
|
8.
|
Which
of the bigger unit of angular displcement
|
|||||||
a)
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radian
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b)
|
degree
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c)
|
revolution
|
d)
|
none
|
|
9.
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If
radius is same ,which of the following has greater moment of inertia
|
|||||||
a)
|
disc
|
b)
|
hoop
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c)
|
rod
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d)
|
sphere
|
|
10.
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For
which of the following bodies,smaller force is required to rotate
|
|||||||
a)
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disc
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b)
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hoop
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c)
|
rod
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d)
|
sphere
|
|
11.
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Two
particles of the same mass have unequal linear and angular momentum,they can
have similar
|
|||||||
a)
|
velocity
|
b)
|
Distance from
axis of rotation
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c)
|
both
|
d)
|
None
of these
|
|
12.
|
Global
positioning system is best peformed by…..satellites
|
|||||||
a)
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Close orbiting
|
b)
|
geostationry
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c)
|
Medium orbiting
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d)
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None
|
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13.
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To
move an electron in its orbit centripetal force is provided by
|
|||||||
a)
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Its weight
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b)
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Gravitational
force
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c)
|
Electric force
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d)
|
none
|
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14.
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If
you whirl a stone in a circle and string breaks then it means
|
|||||||
a)
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Fc>Fr
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b)
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Fr>Fc
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c)
|
Fc=Fr
|
d)
|
None
of these
|
|
15.
|
If
earth’s gravity is changed then which weight will change
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|||||||
a)
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real
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b)
|
apparent
|
c)
|
both
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d)
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none
|
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16.
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Angular
speed of minutes hand of watch is
|
|||||||||
a)
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π
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b)
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π/2
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c)
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π/30
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d)
|
None
of these
|
|||
17.
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A
body moving with a constant speed of 2ms-1,still have acceleration
it is moving along
|
|||||||||
a)
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Straight line
|
b)
|
circle
|
c)
|
Not possible
|
d)
|
Both
possible
|
|||
18.
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Gravity
can not attract
|
|||||||||
a)
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Matter
particles
|
b)
|
Charge
particles
|
c)
|
light
|
d)
|
none
|
|||
19.
|
Moon’s
orbital angular velocity is …..than spin velocity
|
|||||||||
a)
|
smaller
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b)
|
greater
|
c)
|
equal
|
d)
|
none
|
|||
20.
|
Which
of the following weight can never be zero
|
|||||||||
a)
|
Real weight
|
b)
|
apparent
|
c)
|
d)
|
All
of these
|
||||
21.
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More
rotational frequency is required to generate artificial gravity if size of
satellite is
|
|||||||||
a)
|
reduced
|
b)
|
increased
|
c)
|
Size donot
affect
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d)
|
None of these
|
|||
22.
|
According
to Einstein concept light passing closer to sun will follow
|
|||||||||
a)
|
Straight path
|
b)
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Geodesic path
|
c)
|
Circular path
|
d)
|
none
|
|||
23.
|
For
satellite communication we use electromagnetic radiation of wavelength in
|
|||||||||
a)
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Gega
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b)
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Nano
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c)
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Micro
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d)
|
all
|
|||
24.
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For
earth which kinetic energy is greater
|
|||||||||
a)
|
spin
|
b)
|
rotational
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c)
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Both equal
|
d)
|
None of these
|
|||
25.
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If
mass of stattelite is doubled then its orbital velocity becomes
|
|||||||||
a)
|
half
|
b)
|
double
|
c)
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4 times
|
d)
|
No
change
|
|||
26.
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Weightlessness
in a frame of reference can be observed only
|
|||||||||
a)
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Inside frame
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b)
|
Outside the frame
|
c)
|
From both
|
d)
|
None
|
|||
27.
|
Centripetal
force and centripetal acceleration is always
|
|||||||||
a)
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parallel
|
b)
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perpandicular
|
|||||||
c)
|
antiparallel
|
d)
|
none
|
|||||||
28.
|
Which
of the following will always be same for spinning and rotating body
|
|||||||||
a)
|
velocity
|
b)
|
K.E
|
c)
|
Moment of inertia
|
d)
|
Angular
momentum
|
|||
29.
|
Angular
frequency has units similar to
|
|||||||||
a)
|
frequency
|
b)
|
Angular
velocity
|
c)
|
accelration
|
d)
|
none
|
|||
30.
|
You make a jump on the surface of earth and
moon,for which you attain greater height
|
|||||||||
a)
|
earth
|
b)
|
moon
|
c)
|
Equal height
for both
|
d)
|
None
of these
|
|||
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