Question

The induced voltage across a coil with $250$ turns that is located in a magnetic field that is changing at a rate of $8Wb/s$ is

• A. $1,000V$
  
• B. $2,000V$
  
• C. $31.25V$
  
• D. $3,125V$
  

Answer 1

The correct option is B $2,000V$

Number of turns in the coil $N=250$ turns

Rate of change of magnetic flux $\frac{d\varphi }{dt}=8Wb/s$

Induced voltage across a coil $E=N\frac{d\varphi }{dt}$

$\therefore$ $E=250\times 8$ $V$

$⟹$ $E=2000$ $V$