COMPREHENSIVE EXAMS SET 2026 FULL
SOLUTION TEST BANK GRADED A+
●● Motor effect.
Answer: Effect in which a current in a magnetic field experiences a
force.
●● Fleming's left hand rule.
Answer: Way of working out the directions involved in the motor effect.
●● Magnetic flux density.
Answer: Force per unit length per unit current on a conductor
perpendicular to the field lines. Often referred to as the strength of the
magnetic field.
●● Couple.
Answer: Pair of forces in opposite directions that try to turn an object.
Acts on the coil of a motor.
●● Thermionic.
Answer: Property of a material that means that when it gets hot, it emits
electrons.
,●● Cyclotron.
Answer: Spiral particle accelerator.
●● Frequency.
Answer: Number of rotations per second, given by 1/T.
●● Mass spectrometer.
Answer: Device that separates a constituents of a substance by their
masses.
●● Ion.
Answer: Charged atom.
●● Velocity selector.
Answer: Component that uses an opposing electric and magnetic field to
ensure all particles going straight through have the same speed and
direction.
●● Vacuum.
Answer: Space where (nearly) all particles have been removed
(evacuated).
, ●● Electromotive force.
Answer: Force on electrons that tries to push them along. Known as the
emf.
●● Electromagnetic induction.
Answer: Phenomenon in which a changing magnetic field, relative to a
wire, will produce an emf.
●● Fleming's right hand rule.
Answer: Also known as the dynamo rule. Works out directions involved
in electromagnetic induction.
●● Solenoid.
Answer: Electrical coil.
●● Lenz's law.
Answer: "The direction of the induced current is always such as to
oppose the change that caused the current".
●● Magnetic flux.
Answer: Product of the magnetic flux density and the area.
●● Magnetic flux linkage.