1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A ball of mass 1 g and charge 10−8 C moves from a point A having electric potential VA=600 V to a point B, whose electric potential is zero. Velocity of the ball at point B is 20 cm s−1. Velocity of the ball at point A is (Neglect gravitation)

A
16.7 ms1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
16.7 cm s1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
2.8 ms1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
2.8 cm s1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 16.7 cm s−1 Work done by electric force for motion of charge from A to B :- (W)AB=ΔKE=qVAB 12mv2B−12mv2A=q(VA−VB) VB=0,VA=600 V12mv2A=12mv2B−qVA v2A=v2B−2qVAm After solving vA=16.7×10−2 m/sec vA=16.7 cm/sec

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
PHYSICS
Watch in App
Join BYJU'S Learning Program