Question

When a 9 V battery is connected across an unknown reisstor, there is a current of 3 mA in circut, find the value of the resistance of the resistor.

Answer 1

Answer:

The resistance across the circuit is 3000 ohms

Explanation:

Given :

• Potential difference or the voltage across the battery = 9 Volts
• Current flowing through the circuit = 3 MA

To find :

• Value of resistance across the circuit

Using ohms law which says : V=IR

3 MA = 3 × 10^-3

Substituting the values :

9= 3×10^-3×R

9/3=10^-3×R

3= 1/1000 ×R

3000 = R

Resistance is equal to 3000 ohms

Answer 2

_______________________________

✰Question ✰

▪When a 9 V battery is connected across an unknown reisstor, there is a current of 3 mA in circut, find the value of the resistance of the resistor.

_______________________________

Given:-

• Potential difference (V) =9volts

• Current carrying through circuit (I) =3MA

∴ 3MA =3×10^-3

To Find:-

▪ Resistance (R) of the resistor.

Solution :-

According to Ohm's Law

☛ V =IR

☛ 9=3×10^-3×R

☛ 9×10^3/3 =R

☛ R = 9× 1000/3

☛ R = 3000 ohm.

∴The resistance of the resistor is 3000 oh.

_______________________________

More Information!!!!!!!

☛ The Ohm's law states that the potential difference across the ends of a given metallic wire in an electric circuit is directly proportional to the current flowing through it, provide its temperature remain in the same.

V ∝ I............. (i)

V/I= R (constant)............(ii)

From equation (i) and (ii) we get

☛ V=IR