**1. Basics of Electricity**
- **Electric Charge:**
- It is a property of matter that causes it to experience a force in an
electromagnetic field.
- Unit: Coulomb (C).
- Types: Positive (protons) and Negative (electrons).
- **Current (I):**
- Flow of electric charge.
- Unit: Ampere (A).
- Formula: I = Q/t
(Q = charge, t = time)
- **Voltage (V):**
- Potential difference between two points.
- Unit: Volt (V).
- It is the energy required to move a charge from one point to another.
- **Resistance (R):**
- Opposition to the flow of current.
- Unit: Ohm (Ω).
- Depends on material, length, and cross-sectional area.
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### **2. Ohm's Law**
- **Formula:** V = I × R
- V = Voltage, I = Current, R = Resistance.
- **Electric Charge:**
- It is a property of matter that causes it to experience a force in an
electromagnetic field.
- Unit: Coulomb (C).
- Types: Positive (protons) and Negative (electrons).
- **Current (I):**
- Flow of electric charge.
- Unit: Ampere (A).
- Formula: I = Q/t
(Q = charge, t = time)
- **Voltage (V):**
- Potential difference between two points.
- Unit: Volt (V).
- It is the energy required to move a charge from one point to another.
- **Resistance (R):**
- Opposition to the flow of current.
- Unit: Ohm (Ω).
- Depends on material, length, and cross-sectional area.
---
### **2. Ohm's Law**
- **Formula:** V = I × R
- V = Voltage, I = Current, R = Resistance.
