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
For which of the underlisted quantities is the derived unit ML2T2 correct? i. momentum of a force...
The energy stored in a spring of stiffness constant k = 2000Nm−1 when extended 4cm is...
Which of the current-voltage characteristics shown below is that exhibited an ohmic conductor? ...