| Term | Definition |
|---|
| If the north pole of one magnet is brought near the south pole of another magnet, the poles will.... | Attract each other |
| Protons & elctrons _____each other | Attract |
| The primary coil of a transformer has 100 turns on it and the secondary coil has 50 turns on it. This is a ______transformer | Step Down |
| Fuses circuit breakers are used to ..... | all of the above |
| compared to the resistance of two resistors connected in a series, the same two connected in a parallel have.... | less resistance |
| a transformer transforms..... | voltage |
| how much power is used by 6.0-V flashlight battery that draws a 0.5 A of current? | 3 W |
| When one light bulb in a series circuit containing several light bulbs burns out... | none of the other bulbs will light up |
| A device consisting of a coil that is mechanically rotated in a stationary magnetic field is called... | generator |
| most commercial generators are driven by... | steam |
| a rubbed balloonwill stick to a wooden wall, which demonstrates charge.... | polarization |
| a magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. If the number of coils doubles, the induced voltage..... | doubles |
| in a good insulator, electrons are usually... | tightly bound in place |
| a transformer works because... | electricity is induced in a rotating coil |
| an electromagnetic wave is composed of... | perpendicular electric and magnetic fields vibrating together |
| the voltage across a transformer primary coil that has 100 turns is 10V. What is the voltage across the secondary coil, which has 20 turns? | 2 V |
| If you put a small compass in a magnetic field, the compass will... | ??? |
| A device that transforms mechanical energy to electrical energy is a.... | generator |
| electromagnetic waves travel at speeds... | equal to the speeds of light |
| magnetic field strength is.... | strongest at the poles of a magnet |
| a magnet is moved in and out of a coil of wire connected to several lamps. if the number coils is doubled and it is_____to move the magnet | harder |
| loops of wire in a motor rotate because a .... | ??? |
| a woman experiences an electric shock. the electrons making the shock come from... | the woman's body |
| a step-up transformer.... | increases voltage |
| electric power is defined as... | Current x Voltage |
| a magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. if the number of coils doubles, the induced voltage | doubles |
| the reason a magnet can attract an unmagnetized nail is that.... | nails become temporarily magnetized in a magnetic field. |
| an iron rod becomes magnetic when... | ???? |
| a generator is used to light a bulb. energy for lighting the bulb actually comes from a... | mechanical input to the generator |
| electric current can best be induced in a wire by... | moving a magnet up and down near the wire |
| the source of all magnetism is.... | ??? |
| a device that uses two coils around an iron core to change the voltage across a circuit is called a.... | transformer |
| if u break a bar magnet in half , each half... | becomes a bar magnet with two poles |
| a decive that transforms electric energy to mechanical energy is a... | motor |
| moving electric charges will interact with.... | an electric field & a magnetic field |
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