In a uniform magnetic field, a circular loop with an area of 400 cm2 is located perpendicular to the lines

| August 10, 2021 | education

In a uniform magnetic field, a circular loop with an area of 400 cm2 is located perpendicular to the lines of magnetic induction. if in 2 seconds the induction of the mag field changed uniformly from 0.6 T to 0.1 T, then an emf appeared in the circuit.

To find the value of the EMF that has arisen in the specified circuit, we will use the formula: εi = -S * ΔB / Δt = -S * (Bk – VN) / Δt.

The values of the variables: S – the area of the circular loop (S = 400 cm2 = 4 * 10-2 m2); Bk is the final field induction (Bk = 0.1 T); VN – initial induction (Bn = 0.6 T); Δt is the time of induction change (Δt = 2 s).

Let’s perform the calculation: εi = -S * (Bk – VN) / Δt = -4 * 10-2 * (0.1 – 0.6) / 2 = 0.01 V.

Answer: The EMF arising in the indicated circuit is equal to 10 mV.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.