A transformer connected to a 240Vr.m.s has 3000 tu...
A transformer connected to a 240Vr.m.s has 3000 turns in its primary coil and 500 turns in its secondary coil. Calculate the output voltage.
4000V
400V
40V
4V
Correct answer is C
Np=3000turns
Ns=500turns
Ep=240Vr.m.s
Es=?
NsNp=EsEp
5003000=Es240
⟹Es=240×5003000=40V
In which of the following diagrams is the length of the tube equal to one wavelength? ...
The temperature of a liquid falls after some of it has evaporated because ...
What is the difference between a crystalline and an amorphous solid? A crystalline solid ...
Which of the following statements is NOT true of the image in a plane mirror? The image is ...
The time rate of change of momentum is ...
A lead-acid accumulator is used in preference to a dry battery in a car because ...
Which of the following statements are TRUE of isotopes? i. isotopes of an element have the same c...
Mercury is commonly used as a thermometric fluid rather than water because ...