alleryStart learning →Which doughnut-shaped device uses magnetic fields to trap and steer reactive charged particles in fusion research?
AThe cathode ray tube
BThe current balance
CThe tokamak reactor
DThe Hall probe unit
Answer & Solution
Correct answer: C. The tokamak reactor
1. Thermonuclear fusion needs its hot charged particles kept away from the walls.
2. The tokamak uses magnetic fields to contain and direct those reactive charged particles.
3. Its magnetic fields sit in a doughnut-shaped chamber.
4. A Hall probe measures field strength and a cathode ray tube steers an electron beam, so neither confines a fusion plasma.
_Source: OpenStax College Physics (CC BY 4.0), Ch 22 "Magnetism", section 22.5 Force on a Moving Charge in a Magnetic Field: Examples and Applications_
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