A transformer is rated 240v. If the primary coil is 4000 ...
A transformer is rated 240v. If the primary coil is 4000 turns and the secondary voltage 12v, determine the number of turns in the secondary coil.
200
100
250
150
Correct answer is A
in a transformer, E S/E P = N s/N p
where E s=e.m.f(voltage)of the secondary
E p=e.m.f(voltage)of the primary
N s=no.of turns in the secondary
N p= no. of turns in the primary.
since E s= V s; and E p= V p.
V s/ V p= N s/N p
∴12/240= Ns/4000
Ns =(12x4000)/240
=200
The S.I units of frequency, period and amplitude of a wave are respectively...
The compressed regions and the space-out regions in longitude wave are refers to as ...
A man will exact the greatest pressure on a bench when he ...
A cell can supply current of 0.4 A and 0.2 A through a 4.0Ω and 10.0Ω resistors respectively. T...
The phenomenon of radioactivity was first discovered by ...
Two isotopes of uranium are designed as 238U and 235U. The numbers 238 and 235 represe...
Which of the following concepts is a method of heat transfer that does not require a material m...