#### Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Click to Chat

1800-5470-145

+91 7353221155

CART 0

• 0
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

# What is the difference between the two formulas V=E-Ir and V=IR. According to the former V is inversely proportional to I (current) while according to the other one V is directly proportional to I.

Neeti
571 Points
6 years ago
Both refer to terminal potential difference. the first formula V=E-Ir refers to the potential across the ENDS of the battery when a current I is flowing through the battery. the internal resistance r of the cell uses up a part therefore terminal potential difference V decreases as I increases because the factor Ir increases.
. V=IR is the potential difference across an external resistance R. The greater the current, more is the IR factor hence greater is V across the resistance.