Physics - Online Test
Q1. Two objects of masses m1 and m2
fall from the heights h1 and h2 respectively. The ratio
of the magnitude of their momenta when they hit the ground is
Answer : Option C
Explaination / Solution:
No Explaination.
Q2. A book is at rest on the table which exerts a normal force on the book. If this force is considered as reaction force, what is the action force according to Newton’s third law?
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water of the jet. What is the rate at which kinetic energy is imparted to water ?.
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force 30 N?
Answer : Option B
Explaination / Solution:
No Explaination.
Q5. If the distance between the Earth and Sun were to be doubled from its present value, the number of days in a year would be
Answer : Option B
Explaination / Solution:
No Explaination.
Q6. A small sphere of radius 2cm falls from rest in a viscous liquid. Heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity is proportional to
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. When a uniform rod is heated, which of the following quantity of the rod will increase
Answer : Option D
Explaination / Solution:
No Explaination.
Q8. The average translational kinetic energy of gas molecules depends on
Answer : Option A
Explaination / Solution:
No Explaination.
Q9. Two
bodies A and B whose masses are in the ratio 1:2 are suspended from two
separate massless springs of force constants kA and kB
respectively. If the two bodies oscillate vertically such that their maximum
velocities are in the ratio 1:2, the ratio of the amplitude A to that of B is
Answer : Option B
Explaination / Solution:
No Explaination.
Q10.
Compare the velocities of the wave forms given below, and
choose the correct option.
Answer : Option C
Explaination / Solution:
No Explaination.
