Physical Science Spring Review

Electricity and Magnetism

Electric current is produced as ________ flow from a negative area to a positive area.

a.electrons

b.protons

c.photons

d.neutrons

Electric current is produced as ________ flow from a negative area to a positive area.

a.electrons

b.protons

c.photons

d.neutrons

Which of the following describes a material thorough which electricity does not flow?

a.metals

b.conductors

c.water

d.insulators

Which of the following describes a material thorough which electricity does not flow?

a.metals

b.conductors

c.water

d.insulators

Which of the following is NOT a good electric insulator?

a.plastic

b.glass

c.paper

d.wood

e.water

Which of the following is NOT a good electric insulator?

a.plastic

b.glass

c.paper

d.wood

e.water

What three elements are attracted to magnets?

What three elements are attracted to magnets?

iron, cobalt, nickel

Which is NOT a property of a permanent magnet?

a.the atoms are lined up to form domains

b.they attract iron containing object

c.they have a north and south pole

d.they only produce magnetic fields when electric current is running through them

Which is NOT a property of a permanent magnet?

a.the atoms are lined up to form domains

b.they attract iron containing object

c.they have a north and south pole

d.they only produce magnetic fields when electric current is running through them

When current is run through a copper coil which of the following is produced?

a.mechanical energy

b.electric field

c.magnetic field

d.parallel circuit

When current is run through a copper coil which of the following is produced?

a.mechanical energy

b.electric field

c.magnetic field

d.parallel circuit

A circuit breaker or a ________ is a safety device that ensures that will break the circuit if too much current is detected?

a.fuse

b.bulb

c.resistor

d.transformer

A circuit breaker or a ________ is a safety device that ensures that will break the circuit if too much current is detected?

a.fuse

b.bulb

c.resistor

d.transformer

What is the equation for Ohms Law?

What is the equation for Ohms Law?

V = IR

voltage = current x resistance

An electric heater is connected to a 120 volt line, and it uses 10 amps of current. What is the resistance used by the heater?

An electric heater is connected to a 120 volt line, and it uses 10 amps of current. What is the resistance used by the heater? V = IR

120 V = 10 A x R

= 12