Four wires each of length 2.0 n are bent into four loops P, Q, R and S and then suspended into uniform magnetic field. Same current is passed in each loop. Which statement is correct?

Question

Four wires each of length 2.0 n are bent into four loops P, Q, R and S and then suspended into uniform magnetic field. Same current is passed in each loop. Which statement is correct? (A) Couple on loop P will be the highest (B) Couple on loop Q will be the highest (C) Couple on loop R will be the highest (D) Couple on loop S will be the highest

Tardigrade Admin · Accepted Answer

∴ Couple τ =BIA For given measurements only area of circle will be maximum and therefore torque will be maximum. Hence, couple on loop S will be highest.

Q. Four wires each of length $2.0 n$ are bent into four loops $P, Q, R$ and $S$ and then suspended into uniform magnetic field. Same current is passed in each loop. Which statement is correct?

Couple on loop P will be the highest

Couple on loop Q will be the highest

Couple on loop R will be the highest

Couple on loop S will be the highest

$∴$ Couple $τ = B I A$ For given measurements only area of circle will be maximum and therefore torque will be maximum.
Hence, couple on loop $S$ will be highest.

Q. Four wires each of length 2.0n are bent into four loops P,Q,R and S and then suspended into uniform magnetic field. Same current is passed in each loop. Which statement is correct?