Physics, asked by salmankhan22, 8 months ago

A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf's is : A) 3:4 B) 5:4 C) 5:1 D) 3:2

Answers

Answered by Anonymous
0

Answer:

D) 3:2

Explanation:

In series : E1 + E2 = K(50)

In parallel : E1 - E2 = K(10)

E1 + E2 / E1 - E2 = 5/1

=> E1/E2 = 3/2

The emf's are in the ratio of 3:2.

Answered by raginikri2007
0

Answer:

If the emfs of the two cells are taken as E

1

and E

2

respectively.

So,

E

1

−E

2

E

1

+E

2

=

10

50

or,

2E

2

2E

1

=

50−10

50+10

or,

E

2

E

1

=

2

3

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