Question

A soldering rod iron draws an energy of 60,000 J in 5 minute when the current flowing

through its element is 5 A. Calculate the resistance of its heating element.​

Answer 1

Answer:

Explanation:

Given :

• Heat (h) = 60000 J
• Time (t) = 5 min
• Electric current (I) = 5 A

To Find :

• The resistance of it's heating element.

Formula to be used :

• H = I^2RT

Solution :

★Converting units,

Time (t) = 5 min

⇒ t = 5 × 60

⇒ t = 300 s

★Resistance,

H = I^2RT

⇒ 60000 = 5^2 × R × 300

⇒ 60000 = 25 × 300R

⇒ 60000 = 7500R

⇒ R = 60000/7500

⇒ R = 8 Ω

Hence, Resistance of its heating element is 8 Ω.

Answer 2

$\Huge\tt{{\color{red}{{\underline{AN}}}}{\color{lightpink}{{\underline{SW}}}}{\pink{{\underline{ER}}}}{\color{lightpink}{:}}}$

$\huge\color{red}{\textbf{\textsf{GIVEN :-}}}$

• Heat (h) = 60000 J
• Time (t) = 5 minutes
• Electric Current (l) = 5 A

$\huge\color{pink}{\textbf{\textsf{TO FIND :-}}}$

• The resistance of its heating element.

$\huge\color{lightpink}{\textbf{\textsf{FORMULA :-}}}$

• H = l^2RT

$\huge\color{red}{\textbf{\textsf{SOLUTION :-}}}$

Converting units,

Time (t) = 5 minutes

→ t = 5 × 60

→ t = 300 seconds

Resistance,

H = l^2RT

→ 60000 = 5^2 × R × 300

→ 60000 = 25 × 300R

→ 60000 = 7500R

→ R = 60000/7500

→ R = 8 Ω

Hence, the resistance of its heating element is 8 Ω.

Hope it Helps Buddy ❤️