Question

An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be: 
1. 0.92 A
2. 2.9 A
3. 9.2 A
4. 92 A

Answer 1

Correct Answer - Option 3 : 9.2 A

The correct answer is 9.2 A.

• Given: Resistance of the electrical appliance = 25 ohms
• A voltage or the potential difference across the electrical appliance = 230 volts
• To find: Current passing through the electrical appliance
• Formula: Ohms law = V=I×R
• Where, V = potential difference I = current R = resistance
• Substituting the values :
  • 230=I×25
  • I=230/25
  • I=9.2 Amperes
• The current passing through the electrical appliance is equal to 9.2 Amperes. 

• Coulombs law = q=i×t
  • Where q = charge, I = current, t = time