Chapter 9 Electricity/magnetism: Question Preview (ID: 19055)

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A _________ circuit has multiple pathways for electricity to flow.
a) parallel b) series c) conductor d) insulator
As resistance in a circuit increases, the flow of electric current in a circuit ____________.
a) decreases b) increases c) stays the same d) never changes
Materials through which electric charges flow easily are called
a) conductors b) insulators c) generators d) magnets
You can increase the strength of an electromagnet's field by
a) using a stronger ferromagnetic core b) decreasing the current c) decreasing the number of loops in the solenoid d) winding the coils more loosely
As the temperature of a conductor increases, its resistance _____________.
a) increases b) decreases c) stays the same d) turns in an opposite direction
If the distance between charged particles decreases, then the strength of the magnetic field
a) increases b) decreases c) stays the same d) changes direction
The unit for measuring voltage is the
a) volt b) amp c) ohm d) Newton
By moving a wire up and down repeatedly in a magnetic field, _________ current is produced.
a) alternating b) direct c) induction d) magnetic
A step-up transformer _____________ voltage.
a) increases b) decreases c) has no effect on d) moves
Increasing the number of loops on a solenoid will cause the strength of its magnetic field to
a) increase b) decrease c) stay the same d) change direction
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