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A light bulb has a resistance of 240 Ω. Find the current in it when it is placed in a 120-V circuit.

Sagot :

Barramedasmidn

Answer:

The current is 0.5 amperes.

Explanation:

Electrical Circuit

An electrical circuit is defines as a line or a path where an electrical current flows.

When the circuit is closed, both of its ends meet and making it a loop. Electrical current flows within a closed circuit.

Another variety of a circuit is an open circuit. Here, the electron flow is cut short due to its broken path. Electrical current does not flow in an open circuit.

Factors Affecting Electrical Circuit

  • Source
  • Current
  • Resistance
  • Voltage

For this problem, we are going to use the Ohm's Law. The mathematical expression for Ohm's Law is

  • V = IR  where
  • V is the voltage (unit is volts)
  • I is the current (unit is amperes)
  • R is the resistance (unit is ohms or Ω)

Rearranging this to get the current, we have

I = V/R

Solving:

  • V = 120 V
  • R = 240 Ω
  • I = V/R
  • I = 120 V / 240 Ω
  • I = 0.5 amperes

Therefore, the current in the light bulb when placed in a 120 V circuit is 0.5 amperes.

Learn more about Ohm's Law here:

https://brainly.ph/question/6167

Read more about electric circuit here:

https://brainly.ph/question/1880159

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