Using electricity and magnetism

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a device that uses an electromagnet to measure small currents is called

a galvanometer

what does a commutator consist of

a ring split in half.

the group of wire loops wrapped around an iron core in an electric motor is called an

armuter

if a wire with a current is placed in the magnetic field of two magnets, the wire moves. why?

because it is the magnetic field attracting or repelling

as a commutator moves, it slides past two contact points called

brushes.

a device that reverses the current through an electric motor is a

commutator

direct current

consists of charges that flow in one direction

a current consisting of charges that flow in one direction only

direct current

a generator uses motion in a magnetic field to produce an

electric current

what is used the pointer of a galvanometer?

electric current

a device that transforms mechanical energy into electrical energy.

electric generator

a device that transforms electrical energy into mechanical energy

electric motor

a device that uses an electric current to turn an axle is called a

electric motor

a device that uses electric current to turn the blades of a blender is an example of an

electric motor

an electric generator is the opposite of an

electric motor

how is an electric motor the opposite of an electric generator?

electric motor changes electric energy to mechanical energy

the energy associated with electric current is called

electrical energy

an electric motor turns an axle by transforming

electrical energy into mechanical energy.

when a wire with a current is placed in a magnetic field, what energy transformation occurs?

electrical energy is transformed into mechanical energy.

what energy transformation occurs in an electric motor?

electrical energy to mechanical energy

generating an electric current from the motion of a conductor through magnetic field is called

electromagnetic induction

the relationship between electricity and magnetism

electromagnetism

the ability to move an object some distance is called

energy

mechanical energy

energy that moves an object

electric current can be measured with a device called a

galvanometer

the rotation of a wire loop in a magnetic field is the basis of a

galvanometer.

a device that transforms mechanical energy into electrical energy is called an

generator.

a transformer

is a device that increases or decreases voltage.

an electric current is induced in a conductor when the conductor moves through a

magnetic field

a moving fan blade has a type of energy called

mechanical energy

the energy an object has due to its movement or position

mechanical energy

and the energy an object has due to its movement or position is called

mechanical energy.

the parts of a generator that rotate with the wire loop make contact with the brushes are called

slip rings

a coil of wire with a current

solenoid

a transformer that decreases voltage is called a

step down transformer

a transformer that increases voltage is called a

step up transformer

How do drivers of cars use galvanometers?

tells you when to get gas.

alternating current

that consists of charges that move back and fourth in a circuit.

energy

the ability to move an object over a distance

what is energy?

the ability to move an object over distance

electrical energy

the energy associated with electrical currents

what causes the loops of wire and the pointer to move in a galvanometer?

the magnetic field.

in a galvanometer, what does the amount of rotation of the loops of wire and the pointer depend on?

the strength of the current

large generators use armatures similar to those in a motor

true

a transformer consists of

two separate coils of insulated wire wrapped around an iron core.


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