An electric heater works by passing a current of 100 A though a coiled metal wire, making it red hot. If the resistance of the wire is 1.1 ohms, what voltage must be applied to it?

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Chapter1: Units, Trigonometry. And Vectors
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**Understanding How Electric Heaters Work**

An electric heater operates by passing a current of 100 A through a coiled metal wire, causing it to become red hot. The resistance of the wire is 1.1 ohms. To determine the voltage that must be applied to the wire, we will use Ohm's Law.

**Ohm's Law:**
\[ V = I \times R \]

Where:
- \( V \) is the voltage (volts)
- \( I \) is the current (amperes)
- \( R \) is the resistance (ohms)

For the electric heater:
- Current (\( I \)) = 100 A
- Resistance (\( R \)) = 1.1 ohms

**Calculate the Voltage:**
\[ V = 100 \, \text{A} \times 1.1 \, \text{ohms} \]
\[ V = 110 \, \text{volts} \]

Therefore, a voltage of 110 volts must be applied to the wire.
Transcribed Image Text:**Understanding How Electric Heaters Work** An electric heater operates by passing a current of 100 A through a coiled metal wire, causing it to become red hot. The resistance of the wire is 1.1 ohms. To determine the voltage that must be applied to the wire, we will use Ohm's Law. **Ohm's Law:** \[ V = I \times R \] Where: - \( V \) is the voltage (volts) - \( I \) is the current (amperes) - \( R \) is the resistance (ohms) For the electric heater: - Current (\( I \)) = 100 A - Resistance (\( R \)) = 1.1 ohms **Calculate the Voltage:** \[ V = 100 \, \text{A} \times 1.1 \, \text{ohms} \] \[ V = 110 \, \text{volts} \] Therefore, a voltage of 110 volts must be applied to the wire.
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