Question

power dissipated by a 20ohms resistor connected to 20 V source
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Answer 1

${\large{\boxed{\red{\sf{P = \frac{V²}{R}}}}}}$

• ${\sf{P = Power}}$

• ${\sf{V = Potential\: difference}}$

• ${\sf{R = Resistance}}$

${\large{\purple{\sf{⇒P = \dfrac{(20)²}{(20)}}}}}$

${\large{\blue{\bold{\sf{⇒P = 20 W}}}}}$