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It assesses knowledge in subjects relevant to the candidate’s chosen course of study.","tags","utme jamb joint admission matriculation board unified tertiary matriculation examination nigeria africa","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",5,"createdOn",1755987353430,"updatedOn","questionsCount",29915,"courseCount",20,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_420":421,"_110":426},"Yj01Zv1rUvRthaWaVKJX4y9elva65a","q","An electric heater is used to melt a block of ice of mass 1.5kg. If the heater is powered by a 12V battery and a current of 20A flows through the coil, calculate the time taken to melt the block of ice at 0^oC. [specific latent heat of fusion of ice = 336 x 10³Jkg^-1]","ans",[414],1,"1989","course","physics","exp","Elect. energy = heat energy
\n
\nIVt = mL
\n
\n20 X 12 t = 1.5 x 336 x 10³
\n
\nt = 2100 sec ; t = 35mins.","opts",[422,423,424,425],"76.0min","35.0min","21.0min","2.9min",11,"11","initComment","initReply","actionData","errors"]

JAMB - Physics (1989 - No. 11)

Explanation

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