The primary coil of a transformer has N turns and is conn...
The primary coil of a transformer has N turns and is connected to a 120 V a.c. power line. If the secondary coils has 1 000 turns and a terminal voltage of 1 200 volts, what is the value of N?
120
100
1000
1200
Correct answer is B
For the transformer, V ∝ ∩
=> V s ∝ ∩s; Vp ∝ ʌp
=> Vp/Vv = ∩p/∩s, therefore 120/1200 = ∩p/1000
therefore ∩p * 1200 = 120 * 1000
∩p = 120*1000/1200 = 100
The speed of fast-moving neutrons in a nuclear reactor can be reduced by using? ...
In collision between two objects, kinetic energy is conserved only if ...
Natural radioactivity was discovered by ...
If the angle between two vector P and Q is Oo, the vectors are said to...
Which of the following is not a consequence of a force field? ...
Which of the following statements about pressure in a liquid is correct? ...
The distance between a node and an anti-node for a transverse wave is equal to ...