Question

When a 24 v battery is connected to a resistor.the current in it is 0.4

a.what is the resistence of the resistor? what would be current through it when it ia connected to battery of 6v?

Answer 1

Potential Difference,V = 24 V
Current,I = 0.4 A
Resistance,R = ?
V = I x R
24 = 0.4 x R
R = 24 / 0.4
R = 240 / 4
R = 60 ohm.

Potential Difference,V = 6 V
Resistance,R = 60 ohm
Current,I = ?
V = I x R
6 = I x 60 
I = 6 / 60 A
  = 1 / 10 A
I =  0.1 A .

Answer 2

Answer:

Potential Difference,V = 24 V

Current,I = 0.4 A

Resistance,R = ?

V = I x R

24 = 0.4 x R

R = 24 / 0.4

R = 240 / 4

R = 60 ohm.

Potential Difference,V = 6 V

Resistance,R = 60 ohm

Current,I = ?

V = I x R

6 = I x 60 

I = 6 / 60 A

  = 1 / 10 A

I =  0.1 A