Physics online MCQ Test 11 April

Physics MCQ Test (20 Questions)

1. Density conversion question
0.04
0.4
40
400

2. Force proportional to v² → dimension of constant
MLT⁻²
MLT⁻¹
ML⁻¹T
MLT

3. Dimension of √(μ₀ε₀)
length
time
velocity
force

4. Combination giving dimension of length
√(hG/c³)
√(hG/c⁵)
hc/G
√(Gc/h³)

5. Angular velocity direction (clockwise)
+y
+z
-z
-x

6. Uniform circular motion correct statement
velocity constant
acceleration constant
both constant
speed constant & acceleration magnitude constant

7. Time of flight
u²/2g
u²/g
u/2g
2u/g

8. Range relation 30° & 60°
equal
4R
half
double

9. Acceleration from drop (50m, 2s)
20
25
15
30

10. Constant velocity on rough surface
net force zero
no force
only external force
only friction

11. Object at rest on rough incline
both zero
static zero
static ≠0, kinetic=0
both non-zero

12. Centrifugal force exists in
inertial
rotating frame
accelerated frame
both

13. Correct statement centrifugal vs centripetal
action-reaction
centripetal natural
gravitational
opposite directions

14. Centrifugal force pole → equator
increases
decreases
same
varies

15. Spring cut (long piece constant)
k
3k/2
2k/3
6k

16. Elastic collision velocities
-4, +4
both +4
-3, +5
-5, +3

17. Speed rolling sphere
√2gh
√(10/7 gh)
√(4/3 gh)
√(1/2 gh)

18. Speed point on rim
0
v
√2v
2v

19. Angular momentum direction
perpendicular
45°
radius
tangent

20. Rolling motion friction
heat loss
reduces rotation
reduces motion
converts translational to rotational