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A battery has an emf of 15V and internal resistance of 1 . Is the terminal to terminal potential difference less than, equal to or greater than 15V if the current in the battery is (1) from negative to positive terminal, (2) from positive to negative terminal (3) zero current?

a)

Less, grater, equal

b)

Less, less, equal

c)

Greater, greater, equal

d)

Greater, less, equal


Question ID - 151043 | Toppr Answer

A battery has an emf of 15V and internal resistance of 1 . Is the terminal to terminal potential difference less than, equal to or greater than 15V if the current in the battery is (1) from negative to positive terminal, (2) from positive to negative terminal (3) zero current?

a)

Less, grater, equal

b)

Less, less, equal

c)

Greater, greater, equal

d)

Greater, less, equal

1 Answer - 5876 Votes

3537

Answer Key : (a) -

(a)

If E is the emf of the battery, r the internal resistance, i the current drawn and V the PD across the plates of battery, then

Case I When the direction of current in the battery is from –ve to +ve or outside +ve to –ve, then

(during discharging)

V<E

Case II When the direction of current in the battery is form +ve to –ve or outside –ve to +ve, then

              (during discharging)

V>E

Case III When zero current, then



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