this is my question 

Asked by munmunbarman2016 | 10th Jan, 2022, 10:12: AM

Expert Answer:

a) Potential difference = High potential - low potential = VQ - VP = + 50 - (-20) V = 50+20 V = 70 V 
b) When two bodies are connected to one another with the metallic conductor, electrons flows from body at low potential to body at high potential, thus current flows from higher potential to lower potential i.e. current will flow from body Q to body P. 

Answered by Shiwani Sawant | 10th Jan, 2022, 02:09: PM