The identical loops of copper and aluminium are moving with the same speed in a magnetic field. Which of the following statements true?

Options

A. Induced emf and induced current are same in both loops
B. Induced emf remains same, induced current changes in both loops
C. Induced emf changes but induced current remains same in both loops
D. Induced emf will be more in aluminium loop

Answer

B

Explanation

Induced emf in both the loops will be same as `e=(-dphi)/(dt)=B omega sin omega t`
Sicne, B and `omega` are same for both the cases, induced emf will be same.
However, induced current is given by
`I=(e)/(R)`
So, it will depend upon the value of resistance, lower the resistance higher will be the current. Therefore, induced current is different in both the loops.