Question

When a 20V battery is connected across an unknown resistor there is a current of 10 mA in the circuit. Find the value of the resistance of the resister: *
(a) 2000 Ω
(b) 900 Ω
(c) 0.8 Ω
(d) none of these​

Answer 1

Answer:

Explanation:

Given: V=12 V

           I=2.5 mA

Let the resistance be R

By Ohm's Law,  

V=IR

12=2.5×10 ^-3

R=4.8×10  ^3  Ω

Answer 2

Explanation:

a) 2000

first change mA to A by dividing 1000.Then use the formula R=v/I