6.1 x 1011 m. Calculate the centripetal force acting on the electron.
7.7 x 1047 N
6.0 x 10−8N
3.0 x 10−14N
1.3 x 10−26N
Correct answer is B
Centripetal force (Fr) = MV2r
i.e. Fr = Mv2r
= 9.1×10−31×2.0×106×2.0×1066.1×10−11 N
= (36.4×10−196.1×10−11) N
= 5.967 x 10−8 N
~ 6.0 x 10−8 N
3.28 x 1016 rad s−1
8.55 x 103 rad s−1
9.11 x 1013 rad s−1
5.22 x 1015 rad s−1
Correct answer is A
Angular speed of the electron (W)
w = VelocityRadius=VR
= 2.0×1066.1×1011
= 3.28 x 1016 rads−1
Which of the following devices is used for storing electric charges?
Transformer
Ammeter
Potentiometer
Capacitor
Correct answer is D
No explanation has been provided for this answer.