EVALUATION EXAMS 2026 QUESTIONS WITH
SOLUTIONS GUARANTEED PASS
◉ 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. Answer: Product of the magnetic flux and
the number of turns of the coil.
◉ Faraday's law. Answer: "The induced emf in a circuit is equal to
the rate of change of flux linkage through the circuit".
◉ Alternator. Answer: Generator of AC.
◉ Back emf. Answer: An emf generated in a motor that works
against the current that is powering the motor.
◉ Step-up. Answer: Transformer that raises the voltage and lowers
the current (answer is hyphenated!)
◉ Step-down. Answer: Transformer that lowers the voltage and
raises the current (answer is hyphenated!)