{[userprofile.firstName]} {[userprofile.lastName]}
{[userprofile.totalFollowing]} Followers
{[userprofile.totalFollowed]}
{[userprofile.bio]}
{[userprofile.gender]}
{[userprofile.town]}
{[userprofile.state]}
{[userprofile.realNumber]}
{[userprofile.website]}
-
More Difficult Problems in Physics From Jamb 2011
Physics
Admin Admin
12-02-2016 10:43:00 +0000Hello everybody! Here are some questions that over 80% that attempted it got it wrong. Lets see if you can get it right. Try and see if you can solve these questions.
Question 12
A machine is used to lift a load of 20 N through a height of 10 m. If the efficiency of the machine is 40%, how much work is done?
Option A 300 J
Option B 120 J
Option C 80 J
Option D 500 J
Question 37
Three cells each of e.m.f 2V and internal resistance 2 ohms are connected in parallel, the total e.m.f and total resistance are respectively
Option A 2V, 6.0 ohms
Option B 6V, 0.7ohms
Option C 6V, 6.0ohms
Option D 2V, 0.7 ohms
Question 38
In homes, electrical appliances and lamps are connected in parallel because
Option A less current will be used
Option B less voltage will be used
Option C parallel connection does not heat up the wires
Option D series connection uses high voltage
-
Opeyemi Bamigbele
No 12,EFF=wek aotput/wek nput×100%.xo 40=20××10/x×100%=x=5/1×100/1=500/1=500jansa.optn D.
0 12-02-2016 12:07:00 +0000
-
{[reply.name]}
{[reply.voteCount]} {[reply.voteCount]} {[reply.created]}
{[reply.voteCount]} {[reply.created]}