Two sources of equal e-m-f- are connected to an external resistance R- The internal resistance of the two sources are r1 and r2 -r1 gt- r2- If the potential difference across the source having the internal resistance r1 is zero - then R is equal to -

The external resistance ‘R’ should be very very large compared to r1 as well as r2 so that the current is negligible or tending to zero. Then the voltage drop a ...

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Power in an AC Circuit

Two sources o...

Question

Two sources of equal e.m.f. are connected to an external resistance R. The internal resistance of the two sources are r₁ and r₂ (r₁> r₂). If the potential difference across the source having the internal resistance r₁ is zero , then R is equal to ---------------

Open in App

Solution

The external resistance ‘R’ should be very very large compared to r₁ as well as r₂ so that the current is negligible or tending to zero. Then the voltage drop across r₁ will be negligibly small or zero.

Suggest Corrections

Similar questions

Q. Two sources of equal emf are connected to an external resistance R. The internal resistances of two sources are

R_{1}

and

R_{2}

(

R_{2}

R_{1}

). If the potential difference across the source having internal resistance

R_{2}

is zero, then;

Q. Two cells having the same emf are connected in series through an external resistance

R

. Cells have internal resistances

r_{1}

and

r_{2}

such that

r_{1} > r_{2}

respectively. When the circuit is closed, the potential difference across the first cell is zero, then the value of

R

Two cells with the same emf E and different internal resistance $r_{1} a n d r_{2}$ , are connected in series to an external resistance R. The value of R so that the pd across the ﬁrst cell is zero, is:

Q. Two cells, having the same e.m.f are connected in series through an external resistance R. Cells have internal resistance

r_{1}

and

r_{2}

(

r_{1}

r_{2}

) respectively. When the circuit is closed, the potential difference across the first cell is zero. the value of R is

Q. Two cells, having the same e.m.f., are connected in series through an external resistance R. Cell have internal resistances r1 and r2

(r 1 > r 2)

respectively. When the circuit is closed, the potential difference across the first cell is zero. The value of R is:-

Join BYJU'S Learning Program

Two sources of equal e.m.f. are connected to an external resistance R. The internal resistance of the two sources are r1 and r2 (r1> r2). If the potential difference across the source having the internal resistance r1 is zero , then R is equal to ---------------

The external resistance ‘R’ should be very very large compared to r1 as well as r2 so that the current is negligible or tending to zero. Then the voltage drop across r1 will be negligibly small or zero.

Two sources of equal e.m.f. are connected to an external resistance R. The internal resistance of the two sources are r₁ and r₂ (r₁> r₂). If the potential difference across the source having the internal resistance r₁ is zero , then R is equal to ---------------

The external resistance ‘R’ should be very very large compared to r₁ as well as r₂ so that the current is negligible or tending to zero. Then the voltage drop across r₁ will be negligibly small or zero.