Physics - Online Test
Q1. A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is
Answer : Option A
Explaination / Solution:
No Explaination.
Q2. If π = 3.14, then the value of π2 is
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. If the velocity is 
, then the
magnitude of acceleration at t = 0.5 s is
, then the
magnitude of acceleration at t = 0.5 s is
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. Choose appropriate free body diagram for the particle experiencing net acceleration along negative y direction. (Each arrow mark represents the force acting on the system).
Answer : Option C
Explaination / Solution:
No Explaination.
Q5. The potential energy of a system increases, if work is done
Answer : Option A
Explaination / Solution:
No Explaination.
Q6. A rigid body rotates with an angular momentum L. If its kinetic energy is halved, the angular momentum becomes,
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. The gravitational potential energy of the Moon with respect to Earth is
Answer : Option B
Explaination / Solution:
No Explaination.
Q8. With an increase in temperature, the viscosity of liquid and gas, respectively will
Answer : Option C
Explaination / Solution:
No Explaination.
Q9. When you exercise in the morning, by considering your body as thermodynamic system, which of the following is true?
Answer : Option B
Explaination / Solution:
No Explaination.
Q10. The
ratio γ = Cp/Cv for a gas mixture consisting of 8 g of
helium and 16 g of oxygen is
Answer : Option C
Explaination / Solution:
No Explaination.
