Question

heating element is marked to 210 volt, 630 watt.fimd the resistance of the element when connected to a 210 v dc source.​

Answer 1

Explanation:

$p = \frac{ {v}^{2} }{r}$

$630 = \frac{210 \times 210}{r}$

$r = \frac{210 \times 210}{630}$

$r = 70ohm$

Answer 2

Answer:

630= 210×210

r = 70ohmr=70ohm