Question bank/JEE Main/Physics

A circular loop is placed with its plane parallel to a long
current carrying wire as shown. Consider the following statements.
[IMAGE] (i) Circular loop is rotated about y-axis
(ii) Circular loop is rotated about x-axis
(iii) Circular loop is rotated about z-axis
(iv) Circular loop is rotated about the current carrying wire.
Then emf induced in the loop is zero in

A(i) and (ii) onlyB(iii) and (iv) onlyC(i), (ii) and (iii) onlyDin all four cases

Show answer and solution▾

[IMAGE] Due to current carrying wire [IMAGE] is towards negative
z-axis. Also the area vector of the square loop is along positive
z-axis.
∴ If square loop is rotated about x-axis or y-axis the angle
⇒ Flux through the square loop changes
⇒ emf is induced in the loop in case (i) & (ii)

Source: Grass-G / P-02 Physics Paper-02_Update.docx