How long will it take to heat \(3 kg\) of L1't from \(28^{"} C\) in an electnc kettle taking 6Atfem 2 220V supply? (specitic heat capacity ofwater is \(4180 J / k\) )
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
Correct Answer: Option B
Explanation:
Heat gain \(=\) Heat loss
\begin{aligned}
&I v t=m c A \theta \\
&6 \times 220 \times t=3 \times 4180 \times 57 \\
&T=541.1 secs =9.025 mins
\end{aligned}
Heat gain \(=\) Heat loss
\begin{aligned}
&I v t=m c A \theta \\
&6 \times 220 \times t=3 \times 4180 \times 57 \\
&T=541.1 secs =9.025 mins
\end{aligned}