In what direction will the force act in this system? Up Down Left Right Into the page Out of the page I B [Default] [MC Any] [MC All]

A step-up transformer (choose all that apply) decreases voltage increases voltage is used at a power plant is used near homes [Default] [MC Any] [MC All]

Predict the direction of the force on the negatively charged particle below. up down right left into page out of page X - q v [Default] [MC Any] [MC All]

What type of interaction do these two wires experience? Attraction Repulsion No interaction I [Default] [MC Any] [MC All]

Which end of the electromagnet is the North Pole top bottom There is no North pole Battery - + [Default] [MC Any] [MC All]

What direction is the EMF induced in the wire below? v Up Right Down Left None of these [Default] [MC Any] [MC All]

A transformer can work on … Direct current only Direct or alternating current Alternating current only Current doesn’t make a transformer work [Default] [MC Any] [MC All]

The direction of the earth’s magnetic field lines is … From geographic South to North From geographic North to South Parallel to the equator from East to West Magnetic field lines don’t have direction [Default] [MC Any] [MC All]

The source of all magnetism is … Iron ore magnetrons cobalt Moving electric charges None of the above [Default] [MC Any] [MC All]

Which statements are true of electromagnets. (Choose all that apply) They are permanent magnets They have north and south poles They are stronger if there is less current They are stronger if there are more coils The poles switch if the current changes directions None of these are true statements [Default] [MC Any] [MC All]

Choose all true statements about current carrying wires. A magnetic field forms around the wires when there is current present The magnetic field lines form concentric circles around the wire The direction of the magnetic field lines can be predicted with a right hand rule The magnetic field strength decreases as distance from the wire increases. None of these statements are true. [Default] [MC Any] [MC All]

The magnetic field strength is altered An EMF is induced When a conductor is moved through a magnetic field so that it cuts across field lines... The magnetic field strength is altered An EMF is induced A resistance is induced An electromagnet is created None of these [Default] [MC Any] [MC All]

Which of the following describes a motor. (Choose all that apply) Made of a coil of wire spinning in a magnetic field Requires an external force to spin the armature Converts mechanical energy to electrical energy Converts electrical energy to mechanical energy [Default] [MC Any] [MC All]

Which of the following describes a generator. (Choose all that apply) Made of a coil of wire spinning in a magnetic field Requires an external force to spin the armature Converts mechanical energy to electrical energy Converts electrical energy to mechanical energy [Default] [MC Any] [MC All]

What does EMF stand for? Electromagnetic force Electromotive force Electromagnets freeze None of these [Default] [MC Any] [MC All]

What units are used to measure magnetic field strength? Volts Nickels Metallicas Joules Teslas [Default] [MC Any] [MC All]