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


Electricity And Magnetism. TEACHERS: click here for quick copy question ID numbers.

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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