Recent content by aliserwan

i don't know exactly , However, do you agree with me that the correct answer is a

the present problem is Isothermal state so delta T = 0 Delta U=0 then the correct answer is a

A magnetic rod is required when constructing a compass. This can be created by aligning an iron or steel rod with Earth's magnetic field and then tempering or striking it. However, this method produces only a weak magnet so other methods are preferred. For example, a magnetised rod can be...

One of the conditions of the case Isothermal : delta t =0

I found that Isothermal state : delta T = 0 Delta U=0 then the correct answer is a In Adiabatic state: transfer heat zero True or False ??

if i calculate: I=(40/1.2)^0.5=18.25 v=I*R=18.25*1.2=21.9 but what about Units ? watt or Kw >> v or kv

so answer is a ?

i think a is correct

standard unit ? wat/aohm=Amber v kvolt=kw/amber ??

a. No, because only permanent magnets are suitable to be used as a compass. b. Yes, but only if the coil doesn't have an iron core. c. Yes, but only if the coil can turn easily. I choose (c) , Is that correct ?

P=R*I^2 so I=(400000/1.2)^0.5=577.4 A V=R*I so V= 577.4*1.2 =692.88 V

a) 99.5% B) 577.4 A c) 692.88 V