Physics - Online Test
Q1. Two equal masses m1 and m2
are moving along the same straight line with velocities 5ms-1 and -9ms-1
respectively. If the collision is elastic, then calculate the velocities after
the collision of m1 and m2, respectively
Answer : Option C
Explaination / Solution:
No Explaination.
Q2. A round object of mass M and radius R rolls down without slipping along an inclined plane. The fractional force,
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. An object of mass 10 kg is hanging on a spring scale which is attached to the roof of a lift. If the lift is in free fall, the reading in the spring scale is
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. In an isochoric process, we have
Answer : Option A
Explaination / Solution:
No Explaination.
Q6. Which of the following gases will have least rms speed at a given temperature?
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. When a damped harmonic oscillator completes 100 oscillations, its amplitude is reduced to 1/3 of its initial value. What will be its amplitude when it completes 200 oscillations?.
Answer : Option D
Explaination / Solution:
No Explaination.
Q8.
Let y = 1/(1+x2)
at t=0s be the amplitude of the wave
propagating in the positive x-direction. At t
= 2 s, the amplitude of the wave
propagating becomes 1 / 1+(x-2)2. Assume that the shape of the wave does not
change during propagation. The velocity of the wave is
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. The dimension of (μ0ε0)1/2
is
Answer : Option C
Explaination / Solution:
No Explaination.
Q10. If an object is thrown vertically up with the initial speed u from the ground, then the time taken by the object to return back to ground is
Answer : Option D
Explaination / Solution:
No Explaination.
