Question

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Answer 1

Total current

By Ohm's Law , V = I R

V = potential difference

I = current

R = resistance .

Given :

R = R1 + R2 [ since R1 and R2 are in series ]

   ==> R = 2 ohms + 3 ohms

   ==> R = 5 ohms

V = I R

==> I = V / R

Given :

V = 15 v

So : I = V / R

         ==> I = 15 v / 5 ohms

         ==> I = 3 A

Total current is 3 A

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Total resistance

Total resistance is R

R = R1 + R2 [ as they are in series ]

   ==> R = 3 ohms + 2 ohms

   ==> R = 5 ohms

The total resistance is 5 ohms

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Currents for R1 and R2

The current will be the same as they are in series . So they are flowing through the same wire .

Current for both R1 and R2 is the total current = 3 A

Current is 3 A for both

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Potential difference for R1 and R2

For R1

V = I R1

  ==> 3 A × 3 ohms

 ==> 9 v

For R2

V = I R2

 ==> 3 A × 2 ohms

 ==> 6 v

Potential difference for R1 is 9 v and for R2 is 6 v

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Hope it helps you:-)

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