Home
Class 12
PHYSICS
Two cells,Having the same e.m.f., are co...

Two cells,Having the same e.m.f., are connected in series through an external resitance R.Cell have internal resistances `R_(1)` and `R_(2)` `(R_(1)gtR_(2))` respectively.When the circuit is closed,the potential difference across the first cell is zero.The value of R is:-

A

`r_(1) + r_(2)`

B

`r_(1) - r_(2)`

C

`(r_(1) + r_(2))/2`

D

`(r-(1)-r_(2))/2`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CURRENT & CIRCUITS

    CENGAGE PHYSICS ENGLISH|Exercise Kirchhoff s law and simple circuits|15 Videos

  • ELECTRIC CURRENT & CIRCUITS

    CENGAGE PHYSICS ENGLISH|Exercise Combination of Resistance 2|14 Videos

  • COULOMB LAW AND ELECTRIC FIELD

    CENGAGE PHYSICS ENGLISH|Exercise Single Answer Correct Type|22 Videos

  • ELECTRIC CURRENT AND CIRCUIT

    CENGAGE PHYSICS ENGLISH|Exercise Interger|8 Videos

Similar Questions

Explore conceptually related problems

Two cells, having the same emf, are connected in series through an external resistance R . Cells have internal resistance r_(1) and r_(2) (r_(1) gt r_(2)) respectively. When the circuit is closed, the potential difference across the first cell is zero the value of R is

Two cells, having the same emf, are connected in series through an external resistance R . Cells have internal resistance r_(1) and r_(2) (r_(1) gt r_(2)) respectively. When the circuit is closed, the potentail difference across the first cell is zero the value of R is

Two cells, having the same emf, are connected in series through an external resistance R . Cells have internal resistance r_(1) and r_(2) (r_(1) gt r_(2)) respectively. When the circuit is closed, the potentail difference across the first cell is zero the value of R is

Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R_(1) and R_(2) (R_(1) gt R_(1)) . If the potential difference across the source having internal resistance R_(2) is zero, then

According to this diagram , the potential difference across the terminals is ( internal resistance of cell =r)

Two cells of emf E each and internal resistance r_(1) and r_(2) are connected in series across a load resistance R. If potential difference across the first cell is zero, then find the relation between R, r_(1) and r_(2)

Two cells of emf E each and internal resistance r_(1) and r_(2) are connected in series across a load resistance R. If potential difference across the first cell is zero, then find the relation between R, r_(1) and r_(2)

Two sources of equal emf are connected in series and having different internal resistance r_1 and r_2(r_2gtr_1) . Find the external resistance R at which the potential difference across the terminals of one of the sources becomes equal to zero.

Two cells of the same e.mf. e but different internal resistances r_(1) and r_(2) are connected in series with an external resistance 'R'. The potential drop across the first cell is found to be zero. The external resistance Ris

2A cell having an emf epsilon and internal resistance r is connected across a variable external resistance R . As the resistance R is increased, the plot of potential difference V across R is given by