Magnetism Test Physics

Colby decided to make a compass in his kitchen one day. He rubbed a sewing pin 100 times with a magnet. Then he put in on top of water in a cup. What will happen? A. The needle would turn until one end points down. B. The needle would turn until one end points north. C. The needle would spin around and never stop. D. The needle would point to the magnets on his refrigerator.

B. The needle would turn until one end points north.

What will happen if one light bulb is removed from this circuit? A. The other bulbs will go out. B. The other bulbs will stay on C. The other bulbs will get dimmer. D. The battery will become stronger.

B. The other bulbs will stay on

What is the definition of electrical current? A. The opposition to the flow of electrons B. The rate of flow of charge C. The work done on each coulomb of charge D. Electrons moving around

B. The rate of flow of charge

The picture shows an electrical circuit. This circuit is a series circuit because: A. It has 3 light bulbs. B. The same current flows through all three light bulbs. C. It uses a single battery. D. The electrical current is divided between the three light bulbs.

B. The same current flows through all three light bulbs.

A complete path for electrical current to flow is called A. static electricity. B. a circuit. C. static discharge. D. a battery.

B. a circuit.

What is the continuous movement of electrons called? A. static electricity B. current electricity C. friction D. power

B. current electricity

As the resistance of a circuit increases, the current will A. increase B. decrease C. stop D. not be affected

B. decrease

Static charges build up when A. protons move off an object. B. electrons move into an object. C. neutrons move within an object. D. protons move into an object.

B. electrons move into an object.

Magnetism is generated by moving A. protons. B. electrons. C. neutrons. D. atoms.

B. electrons.

Materials that tightly hold on to their electrons are considered ________________. A. good conductors B. good insulators C. good anti-static substances D. poor semiconductors

B. good insulators

Bending water with a charged balloon is an example of what type of charging? A. insulation B. induction C. friction D. conduction

B. induction

When you remove a bulb from a three bulb circuit, and the other two bulbs go off, then the bulbs must have been connected in __________. A. parallel B. series C. open D. closed

B. series

Some materials are magnetic and some are not. Which of the following are magnetic? A. aluminum B. steel C. tin D. copper

B. steel

What is a magnetic field? A. the lines that travel out from magnets in different directions B. the region around a magnet which shows its magnetism C. the domains of a magnet D. the force that causes attraction or repulsion

B. the region around a magnet which shows its magnetism

The further two magnets are apart, the __________________ the force of magnetism. A. stronger B. weaker C. it doesn't matter

B. weaker

Which one of these objects is a good insulator? A. gold B. wood C. magnet D. copper

B. wood

If you break a bar magnet in half, how many poles will it have? A. 0 B. 3 C. 2 D. 1

C. 2

Lightning occurs because _____________. A. the negative charges at the bottom of clouds are attracted to the positive charges on the ground. B. the positive charges at the bottom of clouds are attracted to the negative charges on the ground. C. All of these reasons are correct. D. None of these reasons are correct. E.the positive and negative charges inside clouds are attracted to each other

C. All of these reasons are correct.

What would happen if you broke a bar magnet into 8 pieces? A. You would have 8 half magnets B. You would have 4 complete magnets C. You would have 8 complete magnets D. They wouldn't be magnets anymore

C. You would have 8 complete magnets

What is magnetism? A. invisible objects coming together B. an object that is full of electricity C. a force that attracts or repels certain materials D. a field that exists around all objects

C. a force that attracts or repels certain materials

What does this symbol represent? A. light bulb B. switch C. battery D. resistor

C. battery

To increase the amount of static force, A. increase distance between objects. B. let electrons transfer between objects to become neutral. C. decrease distance between objects. D. nothing can be done. Every object has it's own amount of static force.

C. decrease distance between objects.

Considering how lightning forms, what method of charging takes place within the storm clouds? A. conduction B. induction C. friction D. insulation

C. friction

Which of the following does not conduct electricity? A. key B. penny C. gloves D. water E. paperclip

C. gloves

Earth acts like a giant magnet because its core is made up MOSTLY of A. granite B. limestone C. iron D. nickel

C. iron

Which is an example of static discharge? A. an electric eel B. a blown fuse C. lightning D. an electrical outlet

C. lightning

Iron, Nickel and Cobalt are all __________________ materials A. shiny B. poles C. magnetic D. cold

C. magnetic

When 2 magnets are very close together, the magnetic forces ______. A. cancel each other out. B. attract. C. overlap. D. reverse poles.

C. overlap.

A negatively charged rod touches the copper wire of a neutral electroscope, what happens in the electroscope? A. Electrons move from the rod to the wire and down to make the foil negatively charged. This makes the 2 foils pieces repel each other. B. Protons move from the rod to the wire and down to make the foil positively charged. This makes the foil pieces repel each other. C. Protons move from the rod to the wire and down to make the foil negatively charged. This makes the foil pieces repel each other. D. Electrons move from the rod to the wire and down to make the foil positively charged. This makes the foil pieces attract each other.

A. Electrons move from the rod to the wire and down to make the foil negatively charged. This makes the 2 foils pieces repel each other.

In a parallel circuit which of the following is the same value throughout the circuit? A. Voltage B. Current C. Resistance D. Charge

A. Voltage

Where is the strongest part of a magnet? A. both poles are equally strong B. the south pole C. he north pole D. the center

A. both poles are equally strong

Electricity is the flow of ______. A. electrons B. neutrons C. protons D. particles

A. electrons

As more bulbs are added in series to a circuit, the total resistance will... A. increase B. decrease C. stay the same D. be nonexistent

A. increase

The girl's hair and the balloon are attracting one another. The hair ... A. is positively charged and the balloon is negatively charged. B. and the balloon both have positive charges. C. is negatively charged and the balloon is positively charged. D. and the balloon both have negative charges.

A. is positively charged and the balloon is negatively charged.

Surrounding every magnet is a force called a _______ _______. A. magnetic field B. electro magnet C. electrical current D. field line

A. magnetic field

Which direction does a compass always point? A. north B. south C. east D. west

A. north

If an object has more protons than electrons, its electrical charge is... A. positive B. negative C. neutral D. unknown

A. positive

this is the symbol for a _____? A. switch B. light C. battery D. wires

A. switch

These iron filings show __. A. the magnetic field around the magnet B. what a horseshoe magnet looks like C. the poles are the weakest part of the magnet D. what the magnet is made of

A. the magnetic field around the magnet

Bob placed Magnet X on Car 1 and Object Y on Car 2 as shown. He observed that the cars moved away from each other when they were placed near each other. Which of the following statement(s) about Object Y is/are correct? A: Object Y is a non-magnetic material. B: Object Y is a magnetic material. C: Object Y is a magnet. A. A only B. C only C. A and B only D. A and C only

B. C only

s the distance between two magnets increases (they get farther apart), the force between them: A. Increases B. Decreases C. Stays the same D. Doubles

B. Decreases

Which of the following is true? A. If voltage increased in a circuit, resistance would also increase. B. If voltage increases in a circuit, electric current would also increase. C. If resistance is increased, electric current would also increase. D. If resistance is increased, electric current would increase.

B. If voltage increases in a circuit, electric current would also increase.

If two objects with static charge are attracted, ... A. They are both positively charged. B. One is positively charged and one is negatively charged. C. One is positively charged and one is neutral. D. They are both negatively charged.

B. One is positively charged and one is negatively charged.

Examine the movement of the electric current (the red circles) and then compare that to the movement of the electrons (green charges jumping from atom to atom). Conventionally, electric current is described as flowing from the ________________terminal of a battery to the ________________ terminal. A. negative.....negative B. negative....positive C. positive......negative D. positive....positive

C. positive......negative

The accumulation of excess electric charge on an object is called _____________. A. current electricity B. electric discharge C. static electricity D. voltage

C. static electricity

Static electricity is A. electricity flowing in a wire. B. getting shocked from a doorknob. C. the buildup of electric charges on an object. D. when protons move from one object to another.

C. the buildup of electric charges on an object.

What is the major difference between static electricity and current electricity? A. Current electricity involves a continuous flow of neutrons; static electricity is a sudden transfer of protons B. Current electricity can be deadly; static electricity is almost always safe C. In current electricity, there's a single transfer of electrons; in static electricity, there's a steady flow of electrons D. Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons

D. Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons

What can happen when you touch a metal doorknob after rubbing your socks on the carpet? A. The doorknob sends a burst of electric current into your body B. Our negatively charged body becomes positively charged C. Your finger becomes negatively charged D. Millions of electrons go from your finger into the doorknob

D. Millions of electrons go from your finger into the doorknob

Mrs. Charnecky rubbed two balloons against her wool sweater for 30 seconds each. What will happen when the balloons are brought near each other? A. The balloons will pop. B. The balloons will become positively (+) charged. C. The balloons will attract each other. D. The balloons will repel each other.

D. The balloons will repel each other.

Which equation can be used to correctly calculate the resistance R of a resistor? A. V = I / R B. I = V x R C. R = V x I D. V = I x R

D. V = I x R

What would we call a nail that can pick up a paperclip because it is touching a magnet? A. an unaligned domain B. a permanent magnet C. an electromagnet D. a temporary magnet

D. a temporary magnet

Which is NOT usually a part of a circuit? A. wire B. switch C. power source D. ammeter E. resistor/load

D. ammeter

A magnet will pick up a nail, but not a penny because the nail A. has rust on it. B. is lighter than the penny. C. contains copper. D. contains iron.

D. contains iron.

A charged PVC rod is brought near a balloon, but does not touch the wall. Charges in the wall lean toward the balloon. This is an example of charging by A. friction. B. conduction. C. convection. D. induction.

D. induction.

If you rub a glass rod with a piece of silk, the rod becomes negatively charged. This means that A. friction destroyed some electrons in the silk. B. the silk has become negatively charged. C. protons have moved from the silk to the rod. D. the silk has become positively charged.

D. the silk has become positively charged.

What is needed for current to flow? A. static electricity B. ammeter C. resistance D. voltage

D. voltage