Skip to content

Course home

Sign up

4.5.6a Construction and operation of a transformer

EasyMedium
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293
Question 19

An ideal transformer (100% efficient) has N1 N_1\,N1​ turns on its primary coil and N2 N_2\,N2​ turns on its secondary coil. The voltages across the primary and secondary coils are V1 V_1\,V1​ and V2 V_2\,V2​ respectively, and the currents are I1 I_1\,I1​ and I2I_2I2​.

Which pair of equations is valid for this transformer?

A

V1I2=V2I1V_1 I_2 = V_2 I_1V1​I2​=V2​I1​ and V1V2=N2N1\frac{V_1}{V_2} = \frac{N_2}{N_1}V2​V1​​=N1​N2​​

B

V1I1=V2I2V_1 I_1 = V_2 I_2V1​I1​=V2​I2​ and V1V2=N1N2\frac{V_1}{V_2} = \frac{N_1}{N_2}V2​V1​​=N2​N1​​

C

V1I2=V2I1V_1 I_2 = V_2 I_1V1​I2​=V2​I1​ and V1V2=N1N2\frac{V_1}{V_2} = \frac{N_1}{N_2}V2​V1​​=N2​N1​​

D

V1I1=V2I2V_1 I_1 = V_2 I_2V1​I1​=V2​I2​ and V1V2=N2N1\frac{V_1}{V_2} = \frac{N_2}{N_1}V2​V1​​=N1​N2​​

Markscheme

4.5.6a Construction and operation of a transformer Questions

  1. IGCSE
  2. /Physics
  3. /4.5.6a Construction and operation of a transformer

136 exam-style questions on CIE IGCSE Physics 4.5.6a Construction and operation of a transformer. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank