A thin circular ring of mass m and radius R is rotating about its axis with a constant angular velocity ω. Two objects each of mass M are attached gently to the opposite ends of a diameter of the ring. The ring now rotates with an angular velocity ω′
A.
Angular momentum of the particle rotating with a central force is constant due to
Constant Force
Constant linear momentum
Zero Torque
Zero Torque
C.
Zero Torque
Four point masses, each of value m, are placed at the corners of a square ABCD of side A. The moment of inertia through A and parallel to BD is
m
2m
√m
√m
D.
√m
I = 2m (
The rms value of the electric field of the light coming from the Sun is 720 N/C. The average total energy density of the electromagnetic wave is
3.3 × 10−3 J/m3
4.58 × 10−6 J/m3
6.37 × 10−9 J/m3
6.37 × 10−9 J/m3
B.
4.58 × 10−6 J/m3