Electromagnetism Crossword Puzzle

QUESTIONS LIST:

• magnetic field : the space around a magnet or a current-carrying wire has one of these. (8,5)
• alternator : an alternating current generator. (10)
• step down : transformer that is used to reduce the size of an alternating potential difference. (4-4)
• left hand : fleming’s _ - _ rule is a rule that gives the direction of the force on a current-carrying wire in a magnetic field according to the directions of the current and the field. (4,4)
• electromagnet : an insulated wire wrapped round an iron bar that becomes magnetic when there is a current in the wire. (13)
• induction : electromagnetic _ is the process of inducing a potential difference in a wire by moving the wire so it cuts across the lines of force of a magnetic field. (9)
• generator effect : the production of a potential difference using a magnetic field (9,6)
• stepup : transformer that is used to increase the size of an alternating potential difference. (4-2)
• motor effect : occurs when a current is passed along a wire in a magnetic field, and the wire is not parallel to the lines of the magnetic field, a force is exerted on the wire by the magnetic field. (5,6)
• split ring commutator : a _ - _ _ is the metal contacts on the coil of a direct current motor that connects the rotating coil continuously to its electric power supply. (5,4,10)
• transformer : electrical device used to change an (alternating) voltage. (11)
• induced magnetism : magnetism of an unmagnetised magnetic material by placing it in a magnetic field
• flux density : magnetic _ _ is a measure of the strength of the magnetic field defined in terms of the force on a current-carrying conductor at right angles to the field lines. (4,7)
• solenoid : a long coil of wire that produces a magnetic field in and around the coil when there is a current in the coil. (8)
• dynamo : a direct-current generator. (6)