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mcqs of
,
1 : One radian equals to:
1
:
1/2π rev
2
:
2π rev
3
:
π/4 rev
4
:
π/2 rev
2 : The direction of angular velocity is found by:
1
:
Right hand rule
2
:
Left hand rule
3
:
Head to tail rule
4
:
None
3 : A body starting from rest attains angular acceleration of 5 rad/s² in 2 seconds. Its angular velocity will be:
1
:
10 rad/s
2
:
7 rad/s
3
:
3 rad/s
4
:
2 rad/s
4 : In circular motion, the angle between linear and angular velocity is:
1
:
90°
2
:
180°
3
:
0°
4
:
45°
5 : 2 revolutions are equal to:
1
:
4π rad
2
:
π rad
3
:
3π/2 rad
4
:
2π rad
6 : All points on a rigid body rotating about a fixed axis do not have the same:
1
:
Speed
2
:
Angular speed
3
:
Angular acceleration
4
:
Angular displacement
7 : The ratio of the moment of inertia of disc to hoop is:
1
:
1/2
2
:
1/4
3
:
3/4
4
:
1
8 : Time period of geostationary satellite is:
1
:
1 day
2
:
365 days
3
:
6 hours
4
:
12 hours
9 : 30° is equal to how many radians?
1
:
π/6
2
:
π/8
3
:
π/5
4
:
π/2
10 : Centripetal force performs:
1
:
No work
2
:
Maximum work
3
:
Minimum work
4
:
Negative work
11 : Which quantity is dimensionless?
1
:
Angular displacement
2
:
Angular velocity
3
:
Angular acceleration
4
:
Centripetal force
12 : For uniform circular motion, tangential acceleration is:
1
:
Zero
2
:
Centripetal acceleration
3
:
Centrifugal acceleration
4
:
Angular acceleration
13 : A body of mass 8 kg moves along a circle of radius 4m with speed 8 m/s. The centripetal force is:
1
:
128 N
2
:
48 N
3
:
8 N
4
:
18 N
14 : Which relation is correct for circular motion?
1
:
v = rω
2
:
ω = vr
3
:
v = r/ω
4
:
ω = r/v
15 : The moment of inertia of a body depends upon:
1
:
mass of the body and its distribution about axis of rotation
2
:
volume of the body
3
:
kinetic energy of the body
4
:
angular momentum of the body
16 : The apparent weight of an object of mass m when the lift is moving upward with acceleration equal to g is:
1
:
zero
2
:
mg
3
:
½ mg
4
:
2 mg
17 : A man inside an artificial satellite feels weightlessness because the force of attraction due to the Earth is:
1
:
zero at pole
2
:
balanced by the force of attraction due to the moon
3
:
equal to the centripetal force
4
:
non-effective due to some particular design of the satellite
18 : The angular displacement for daily rotation of Earth is:
1
:
2π rad
2
:
0 rad
3
:
π rad
4
:
4π rad
19 : A body rotating with ω=2 rad/s and v=2 m/s has radius:
1
:
1 m
2
:
0.5 m
3
:
4 m
4
:
2 m
20 : An object of mass 'm' in an elevator moving downward with acceleration g has apparent weight:
1
:
Zero
2
:
2 mg
3
:
mg
4
:
mg/2
21 : A 100 kg satellite orbiting at 400 km requires speed v. A 200 kg satellite at same radius needs speed:
1
:
v km/hour
2
:
2v km/hour
3
:
v√2 km/hour
4
:
√2 v km/hour
22 : Angular speed of minute hand of a watch is:
1
:
π/30 rad/min
2
:
π/2 rad/min
3
:
π rad/min
4
:
None of these
23 : A freely falling lift (80 kg man, g=10 m/s²) shows apparent weight of:
1
:
Zero
2
:
900 N
3
:
800 N
4
:
700 N
24 : The ratio of angular speeds of minute hand to hour hand is:
1
:
12:1
2
:
1:6
3
:
6:1
4
:
1:12
25 : A stone whirled in a vertical circle has minimum tension when:
1
:
At the top
2
:
Half way down
3
:
At the bottom
4
:
Anywhere
26 : Angular momentum has the same unit as:
1
:
Impulse × distance
2
:
Power × time
3
:
Linear momentum × time
4
:
work × frequency
27 : When a bottle of soda water is swung briskly in a vertical circle, where do the bubbles collect?
1
:
Near the bottom
2
:
In the middle of bottle
3
:
Bubbles remain distributed throughout the volume
4
:
Near the neck of the bottle
28 : The relationship between linear velocity (v) and angular velocity (ω) is:
1
:
v = rω
2
:
v = r/ω
3
:
v = ω/r
4
:
v = r²ω
29 : Height of geo-stationary orbit above Earth is approximately:
1
:
36,000 km
2
:
300 km
3
:
250 km
4
:
400 km
30 : When an elevator is moving downward with acceleration 'a', the apparent weight is:
1
:
T = W + ma
2
:
T = W - ma
3
:
T = W
4
:
none of these
31 : The angle 2π rad is equal to:
1
:
360°
2
:
180°
3
:
90°
4
:
0°
32 : The minimum velocity to put a satellite into orbit is called:
1
:
Critical velocity
2
:
Terminal velocity
3
:
Artificial velocity
4
:
Angular velocity
33 : A person stands on a weighing scale in a lift moving upward with constant velocity. The scale will show:
1
:
Less than W
2
:
More than W
3
:
Equal to W
4
:
None of these
34 : A wheel of radius 2 m turns through 57.3°. The tangential distance is:
1
:
2 m
2
:
4 m
3
:
57.3 m
4
:
114.6 m
35 : A wheel of diameter 1 m makes 60 rev/min. The linear speed at its rim is:
1
:
π m/s
2
:
2π m/s
3
:
π/2 m/s
4
:
3π m/s
36 : The angle through which a body moves is called:
1
:
Angular displacement
2
:
Angular velocity
3
:
Angular acceleration
4
:
Angular momentum
37 : A wheel of radius 50 cm with angular speed 5 rad/s has linear speed:
1
:
2.5 m/s
2
:
1.5 m/s
3
:
3.5 m/s
4
:
4.5 m/s
Physics 11th MCQs || Ilam Ghar
Chapter 3 : Circular and Rotational Motion
Physics 11th
