7th grade chap. 6 Electricity

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repel

Like electric charges ________each other.

current

The severity of an electric shock depends on the amount of __________.

decreases

The strength of the electric field of a charged particle becomes greater as the distance from the particle ____________.

law of conservaton of charge

The _________________________ states that charges is are not created or destroyed.

electric force

The attraction or repulsion between electrical charges is called _________________.

voltage sources

Batteries and generators are examples of ______________, which create a potential difference in a circuit.

ammeter

To measure the current through a device in an electric circuit, an ________ should be connected in series with the device.

current

The continuous flow of charges through a material is electric________.

energy

In a flashlight, the battery is a source of electrical ________.

attract

As in the case of unlike magnetic poles, unlike electric charges ______ each other.

static electricity

The buildup of electric charges on an object is called _________.

friction

Clothes in a dryer acquire static cling by ________.

static discharge

The loss of static electricity as electric charges move off an object is called ________________.

neutral

Suppose you acquire a positive charge from walking across a carpet. You then touch a doorknob and receive a shock. This leaves you electrically __________.

voltage

__________ causes charge to move in a circuit.

of the least resistance

An electric current will always follow the path______________________.

dimmer

In a series circuit with three bulbs, adding another bulb will make all the bulbs _________.

its own path

In a parallel circuit with three bulbs, current from each bulb has ______________.

voltmeter

a device used to measure electrical potential energy difference, or voltage, is called a __________.

short circuit

A connection that allows current to take the path of least resistance is called a ________________.

you cannot use it again

One disadvantage of using fuses when a fuse burns out, __________________.

cause burns and stop your heart

A current of greater than 0.2 amps could ___________________________.

positive

The charge on a proton is _________, and the charge on an electron is negative.

negative

The charge on a proton is positive, and the charge on an electron is __________.

electroscope

An instrument that can detect the presence of an electric charge is and ______________.

voltage source

A device that creates a potential difference in an electric circuit is a _________________.

electric circuit

A complete, unbroken path through which electric charges can flow is an _________________.

conductors

Materials that allow the charges of an electric current to move freely through them are called ____________.

rubber

An example of an unsulator is ____________.

switch

A device that used to open and close an electric circuit is a ___________.

electric current

The ampere is a unit of ____________.

electrochemical cell

A device that transforms stored chemical energy into electrical energy is and _________________.

terminals

The parts of the cell that are used to connect an electrochemical cell to a circuit are the _________.

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