In case of a simple pendulum, the cause of damping is__________________?
(A) Drag force of air
(B) Gravity
(C) Tension in the string
(D) None of these
A cup of milk is placed in a microwave oven. Tell which statements is false. (1) Milk will be heated up only. (2) Cup will remain cool. (3) Both cup and mild will get hot ?
(A) None
(B) 1
(C) 2
(D) 3
The distance covered by a body in one complete vibration is 20cm. What is the amplitude of body ___________________?
(A) 10 cm
(B) 5 cm
(C) 15 cm
(D) 7.5 cm
For a simple pendulu,m the restoring force is caused by________________?
(A) Gravity
(B) Spring
(C) Hand
(D) All of these
Displacement of the body in S.H.M is equal to amplitude when the body is at_______________?
(A) Mean position
(B) Elsewhere
(C) Extreme position
(D) None
The projection of the particle moving in a circle with non-uniform speed executes ?
(A) S.H.M
(B) Vibratory motion
(C) Both B and D
(D) None S.H.M
The velocity of the mass attached to a spring is maximum at_______________?
(A) Mean position
(B) Extreme position
(C) Both A and B
(D) None
At Murree Hills (Assume the value of g changes). If we use a simple pendulum as time standard then one-second duration will_____________?
(A) Increase
(B) Decrease
(C) Remains the same
(D) Is zero
If a material object moves with speed of light its mass becomes ________________?
(A) equal to its rest mass
(B) double of its rest mass
(C) infinite
(D) zero
Select an alternative from of uncertainly principle from the following_______________?
(A) ∆E = h/m∆c(1-cosθ)
(B) ∆E . ∆t = h
(C) mc2 = hv
(D) Any of above