Question

Question:−
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➜ᴀ ʜᴇᴀᴛɪɴɢ ᴇʟᴇᴍᴇɴᴛ ɪs ᴍᴀʀᴋᴇᴅ 210 ᴠ, 630 ᴡ. ғɪɴᴅ ᴛʜᴇ ʀᴇsɪsᴛᴀɴᴄᴇ ᴏғ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛ ᴡʜᴇɴ ᴄᴏɴɴᴇᴄᴛᴇᴅ ᴛᴏ ᴀ 210 ᴠ ᴅᴄ sᴏᴜʀᴄᴇ.​

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Answer 1

Answer:

Resistance r = 1/70 ohm

Step-by-step explanation:

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

630 = 210 × 210 ÷ r

therefore, r = 3 ÷ 210

r = 1/70

Answer 2

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✍ GIVEN :

• p = 630 w.

• potential = 210 v.

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✍ TO FIND :

• formula :

• = i (current)

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✍ to know :

• $\: \: \: :\implies \: \sf{power = i \times potential}$
• $\: \: \: :\implies \sf{630 \: w = i \times 210 \: v}$
• $\: \: \: :\implies \sf{(i) = 3 |a| }$
• a : t : q

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✍ to find resistance :

• $\: \: \: \sf{: \implies{v = i \times r(ohm \: law)}}$

• $\: \: \: \sf{210 \: v = 3a \times r}$

• ${ :\implies\huge \boxed{\bold{r = 70 \: Ω}}}$

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