Two cars are going in two .concentric circular orbits of radius r, and r2 with angular velocities omegaavdeltaomega_2 what is the radio of their liner of their velocities?

If two bodies have circular path of radius rt and r2 and the time taken are the same, find the ratio of the -angular speed.

If a body is moving in a circle of radius r with a constant speed v m/s. Its angular velocity is

A circular coil of radius 'r' carrying current I is equivalent to a magentic dipole. What is the magnetic moment of the di-pole?

What is the volume of a solid sphere of radius 2R?

Two satellite of masses (m_1 and m_2 (m_1 > m_2) are revolving round the earth in circular orbit of radii r_1and r_2 (r_2 > r_2) respectively. Which of the following statements is true regarding their speeds v_1 and v_2

An electron is moving round the nucleus of a H_2 atom in a circular orbit of radius r. The coulomb force F between the two is

In a circus a rider rides in circular track of radius R in the vertical plane. The minimum velocity at highest point of the track will be :

Two particles-one of mass m1, and the other of mass m2, carry equal charges. After being accelerated through the same potential difference they enter a region of uniform magnetic field and describe circular paths of radius (r_1) , and (r_2) , respectively. Find the ratio of their masses.