Question 1

What is an ohm?

Accepted Answer

An ohm (Ω) is the SI unit of electrical resistance. 1 Ω = 1 V/A (voltage divided by current).

Question 2

What is the relationship between SI and CGS resistance units?

Accepted Answer

1 abohm = 10⁻⁹ Ω (very small), while 1 statohm ≈ 8.988 × 10¹¹ Ω (very large).

Question 3

What is Ohm's Law?

Accepted Answer

Ohm's Law states V = I × R, where V is voltage in volts, I is current in amperes, and R is resistance in ohms. It is the fundamental relationship in electric circuits.

Question 4

What resistance values are typical in electronics?

Accepted Answer

Common resistor values range from 1 Ω to 10 MΩ. LEDs typically use 220–1000 Ω current-limiting resistors. Human skin resistance varies from about 1 kΩ (wet) to over 100 kΩ (dry).

Megaohm to Milliohm

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