Question

$\Large{\underline{\underline{\bf{Question:-}}}}$
➜ᴀ ʜᴇᴀᴛɪɴɢ ᴇʟᴇᴍᴇɴᴛ ɪs ᴍᴀʀᴋᴇᴅ 210 ᴠ, 630 ᴡ. ғɪɴᴅ ᴛʜᴇ ʀᴇsɪsᴛᴀɴᴄᴇ ᴏғ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛ ᴡʜᴇɴ ᴄᴏɴɴᴇᴄᴛᴇᴅ ᴛᴏ ᴀ 210 ᴠ ᴅᴄ sᴏᴜʀᴄᴇ.​

Answer 1

A heating element is marked 210V,630W

To find the resistance of the element when connected to a 210V dc source.

Solution:

The power of the heating element is 630 Watt and its voltage is 210V. Thus, the current drawn can be calculated with the formula

P=VI,

where P denotes the power, V stands for the voltage and I is the symbol of the current.

So the value of the current drawn =

V

P

=

210

630

=3A

And the resistance of the element when connected to a 210V dc source =

I

V

=

3

210

=70Ω

Answer 2

Explanation:

HEY MATE .............

$given \: that : \\ p = 630w \\ potential = 210v \\ \\ to \: find \: = i(current) \\ \\ as \: we \: know \: \\ \\ \: \: \implies power = i \times potential \\ \\ 630w = i \times 210v \\ \\ \implies(i) = 3 |a| \\ \\ a : t : q \\ \\ to \: find \: resistance \: \\ \\ \implies v = i \times r(ohm \: law) \\ \\ 210v = 3a \times r \\ \\ \implies \: r = 70 \: ohm \:$

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