Distance between the charge −q and +q is r=2(2b)2+(b)2=23b Electric potential energy of charge +q is v=8×4πε01ra(−a)=8×4πε0123bq(−a)U=3πε0b−4q2
NEET UG 2002 — Physics Electromagnetism
Identical charges (−q) are placed at each corner of a cube of side ' b ' then the electrical potential energy of charge (+ q ) which is placed at the centre of cube will be:
Held on 30 Apr 2002 · Verified 9 Jul 2026.
πε0b−42q2
πε0b−82q2
3πε0b−4q2
4πε0b82q2
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