Voltage vs Current — Difference (with Table)
Voltage vs Current compared side by side — a 7-row comparison table and 4 key points. Class 10-12 Physics, free and no sign-up.
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TL;DR: Voltage vs Current compared side by side — a 7-row comparison table and 4 key points. Class 10-12 Physics, free and no sign-up.
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The main difference between Voltage and Current: Voltage is the electrical potential difference that drives current, while current is the flow of electrical charge. These fundamental electrical concepts a
Voltage vs Current — Comparison Table
| Basis | Voltage | Current |
|---|---|---|
| Definition | Potential difference between two points | Flow of electrical charges |
| Cause and effect | Causes current to flow | Result of voltage applied |
| SI Unit | Volt (V) | Ampere (A) |
| Symbol | V | I or A |
| Measurement | Measured with voltmeter (parallel connection) | Measured with ammeter (series connection) |
| Analogy | Like water pressure in a pipe | Like flow of water through a pipe |
| Formula relationship | V = I x R (Ohm's law) | I = V / R (Ohm's law) |
Key Points
- Voltage is the push that drives charge; current is the actual flow of charge
- Higher voltage causes higher current if resistance remains constant
- Current can flow only if there is voltage; voltage can exist without current flowing
- Ohm's law shows the relationship: V = IR