alleryStart learning →Which law states the direction and magnitude of the field due to each single segment of a current?
AThe law of Faraday
BThe Biot-Savart law
CThe law of Ampere
DThe law of Maxwell
Answer & Solution
Correct answer: B. The Biot-Savart law
1. Each segment of current produces a field like that of a long straight wire.
2. The total field of any shaped current is the vector sum of the fields from all its segments.
3. The formal statement for a single segment is the Biot-Savart law.
4. Summing those segment fields with integral calculus leads to the more complete law of Ampere.
5. So the segment law and the general law are two different steps of the same argument.
_Source: OpenStax College Physics (CC BY 4.0), Ch 22 "Magnetism", section 22.9 Magnetic Fields Produced by Currents: Ampere's Law_
Keep practising Magnetism
Browse all Magnetism questions for B.Tech EEE, or explore more Electrical Engineering topics.
Related questions
For which task are x ray images more effective than MRI images?Which sensor, operating at liquid helium temperature, can measure fields thousands of timeWhat is a recording of the magnetic field of the beating heart called?What does functional MRI actually detect when it maps activity in the brain?Nuclear magnetic resonance was formulated in 1946. Who received the 1952 Nobel Prize in PhWhat is the largest part of an MRI unit, and what field strength does it typically produceHow is the electron beam of a cathode ray tube aimed at a chosen point on the screen?Wires of infinite length cannot be built. How is the definition of the ampere realised in