Question

$\Large{\underline{\underline{\bf{Question:-}}}}$


➜A heating element is marked 210 V, 630 W. Find the resistance of the element when connected to a 210 V dc source.​

Answer 1

Answer:

ANSWER

Given: 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 =VP=210630=3A

And the resistance of the element when connected to a 210V dc source = IV=3210=70Ω

Answer 2

$\large{\underline{\underline{\bf{\red{QueStiOn :}}}}}$

➜A heating element is marked 210 V, 630 W. Find the resistance of the element when connected to a 210 V dc source.

$\large{\underline{\underline{\bf{\pink{AnSwEr : }}}}}$

ᴛʜᴇ ᴘᴏᴡᴇʀ ᴏғ ʜᴇᴀᴛ ᴇʟᴇᴍᴇɴᴛ ɪs 630 ᴡᴀᴛᴛ ᴀɴᴅ ɪᴛs ᴠᴏʟᴛᴀɢᴇ ɪs 210ᴠ.

ᴛʜᴜs ᴛʜᴇ ᴄᴜʀʀᴇɴᴛ ᴅʀᴀᴡɴ ᴄᴀɴ ʙᴇ ᴄᴀʟᴄᴜʟᴀᴛᴇᴅ ᴡɪᴛʜ ᴛʜᴇ ғᴏʀᴍᴜʟᴀ

$\large\sf\purple{ᴘ = ᴠɪ}$

ᴡʜᴇʀᴇ,

ᴘ = ᴘᴏᴡᴇʀ

ᴠ = ᴠᴏʟᴛᴀɢᴇ

ɪ = sʏᴍʙᴏʟ

ɴᴏᴡ,

ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏғ ᴛʜᴇ ᴄᴜʀʀᴇɴᴛ ᴅʀᴀᴡɴ =

ᴘ/ᴠ = 630/210

= 3ᴀᴍᴘᴇʀᴇ