What causes heating in electrical circuits?

Options

A. Voltage
B. Current
C. Resistance
D. Surrounding

Explanation

**Step-by-Step Solution:**

1. **Understanding the Concept of Heating in Circuits:**
- Heating in electrical circuits is primarily caused by the flow of electric current through a conductor, which encounters resistance.

2. **Setting Up the Circuits:**
- Consider two circuits:
- **Circuit 1:** Contains a battery, a switch, and a resistance (R).
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