JAMB - Physics (1978 - No. 29)
A potential difference of 6v is used to produce a current of 5A for 200s through a heating coil. The heat produced is
4800 cal
6000 cal
2400J
240k cal
6000J
Vysvětlení
Heat energy = Elect. energy = Ivt
= 5 x 6 x 200
= 6,000J
= 5 x 6 x 200
= 6,000J