Question

solve it plz !!!!!❤​

Answer 1

Explanation:

In parallel R=1/2+1/2= 1ohm

I =1.2A

permittivity = I(R+r)= 1.2(1+r) =1.2+1.2r

I=0.4A

permittivity=I(R+r)=0.4(4+r)=1.6+0.4r

It means

1.2+1.2r =1.6+0.4r

0.8r=0.4

r=0.4/0.8=1/2=0.5 ohm

permittivity=I(R+r) =1.2(1+0.5)=1.8V

Answer 2

Answer:

Emf of the cell (e) = I(R+r)

resistance in parallel, R= 2×2÷2+2=1 ohm

resistance in series, r = 2+2=4 ohm

At first event, E=1.2(l+r)....................... (1)

At second event. E= 0.4(4+r).....................(2)

from 1 and 2 equation

0.4(4+r) = 1.2(l+r)

r=0.5 ohm

E= 0.4(4+0.5)

E=1.8V

Explanation:

hence, EMF of cell is 1.8V

internal resistance,r= 0.5 ohm