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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},"6DBmMJHiBw78k6tw5K49nUGLv2dG8e","q","How long does it take a 750W heater to raise the temperature of 1kg of water from 20^oC to 50^oC [specific heat capacity of water = 4200Jkg^-1K^-1]","ans",[414],2,"1991","course","physics","exp","Heat energy = Elect. energy
\n
\nmc\\(\\theta\\) = power x time
\n
\n1 x 4200 x (50 - 20) = 750 x t
\n
\nt = 168s","opts",[422,423,424,425],"84s","112s","168s","280s",16,"16","initComment","initReply","actionData","errors"]

JAMB - Physics (1991 - No. 16)

Explanation

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