How long will it take to heat 3 kg of water from 28oC to 88oC in an electric taking a current of 6 A from an e.m.f. source of 220V?
A
96s
B
1.20s
C
570s
D
600s
E
1200s
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Ivt = mcΔθ
t = mcΔθ/Iv = 3x 4200 x (88 - 28)/6 x 200
Source: Myschool Past Questions Archive (Record #24158)