Question

A bulb of resistance 400ohm connected to 220v mains.calculate the magnitude of current

Answer 1

Answer:

0.55 is the answer

v=i/r so formula is i=v/r.

so i= 220/400= 0.55amp and magnitude is in opposite direction

Answer 2

✰ Given -

• Resistance (R) = 400 ohm
• Voltage (V) = 220 Volt

✰ To Find -

• Current (I) = ?

✰ Solution -

We know Ohm's Formula,

$✓ \: </strong><strong>V</strong><strong> = \: </strong><strong>I</strong><strong> \times </strong><strong>R</strong><strong>$

Placing Values,

$⟶220 = I \times 400$

$⟶I = \frac{\cancel{220}}{\cancel{400}}$

$⟶I = 0.55Ampere$

⛬ Current is 0.55 Ampere & Magnitude is in Opposite Direction