An electron is revolving in an orbit of radius 2 A with a speed of 4 x 105 m /s. The angular momentum of the electron is [Me = 9 x 10-31 kg]
A. 2 x 10-35 kg m2 s-1
B. 72 x 10-36 kg m2 s-1
C. 7.2 x 10-34 kg m2 s-1
D. 0.72 x 10-37 kg m2 s-1
Answer:B
An electron is revolving in an orbit of radius 2 A with a speed of 4 x 105 m /s. The angular momentum of the electron is [Me = 9 x 10-31 kg]
A. 2 x 10-35 kg m2 s-1 B. 72 x 10-36 kg m2 s-1 C. 7.2 x 10-34 kg m2 s-1 D. 0.72 x 10-37 kg m2 s-1