Question

8. When a 9V battery is connected across an unicorn
resistor, there is a current of 3 mA in the circuit
en
Find the value of the resistance of the resistor​

Answer 1

V= 9V

I = 3mA

using V=IR

R = V/I

R = 9/3

R =3 ohm

hope this is right. if not then you can try the same method after converting the current into amperes.formula will be same .

Answer 2

V=12v

I=2.5mA

=2.5×10^-3 × 10 = 25× 10^-4

R= ?

R = V/I

R = 12/25×10^-4

R = 12 × 10^4/25

R = 12 × 10000/25

R = 4800

Resistance = 4800 ohm.