Question

The p.d across the terminals of an electric oven is

220V, and the resistance offered by the oven is 11 ohm

.Calculate the electric current flowing through it. ​

Answer 1

Given :-

Potential difference (V)= 220V

Resistance (R) = 11ohm

To find :-

The Rate of current(I) flowing through it

$\underline{\bigstar{\small{\sf{ \ Potential \ diffrence (V)= Current (I)\times Resistance (R)}}}}$

$:\implies\sf V=IR\\ \\ \sf\bullet \ Put\ the \ values\\ \\ :\implies\sf 220V= I\times 11\Omega\\ \\ :\implies\sf \cancel{\dfrac{220}{11}}=I\\ \\ :\implies\sf 20= I\\ \\ :\implies \sf Current (I) =20 \ A$

$\underline{\bigstar{\textsf{\textbf{ Flow \ of \ electric\ current= 20 \ Ampere}}}}$

◆ Formulas related current !

$\bullet\sf Electric\ Current (I) = \dfrac{ Charge }{Time }= \dfrac{Q}{T}\\ \\ \bullet\sf Ohm's\ law \ \ V= IR\\ \\ \bullet\sf Power (P) = I^2R\\ \\ \bullet\sf Heat(H) = I^2Rt$

Answer 2

Given

● Voltage = 220 V

● Resistance offered = 11Ω

To find

● Current flowing through it.

Concept :

Ohm's law states that potential difference of a electric system is proportional to current & resistance. And current is inversely proportional to voltage & resistance.

• V = IR
• I = V/R

Where, V = Voltage, R = Resistance, I = Current.

Solution

Now we have voltage (v) = 220V & resistance (R) = 11Ω

Using Ohm's law :

★ Current(I) = V/R

Putting values we get :

⇒ I = 220V/11Ω

⇒ I = 20A

∴ Current flowing = 20 Amphere.

More formulas :

• Heat produced = I²Rt
• Power = Work/Time
• Potential difference = Work done/Charge