alleryStart learning →What is a recording of the magnetic field of the beating heart called?
AA magnetoencephalogram
BAn electrocardiogram
CAn electroencephalogram
DA magnetocardiogram
Answer & Solution
Correct answer: D. A magnetocardiogram
1. Currents in the heart and in nerve cells create magnetic fields, as any current does.
2. Recording the magnetic field of the beating heart gives a magnetocardiogram.
3. Measuring the magnetic field of the brain gives a magnetoencephalogram instead.
4. The electrocardiogram and electroencephalogram record electric fields, not magnetic ones.
5. In the magnetic techniques the sensors do not touch the body at all.
_Source: OpenStax College Physics (CC BY 4.0), Ch 22 "Magnetism", section 22.11 More Applications of Magnetism_
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