Quiz
Magnetism: magnetic fields, poles, electromagnets
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Perguntas do quiz (30)
1when you place a magnet near a compass it will....
- Ado nothing because it isn't affected by it at all.
- Battract and stick to the compass because it is magnetic.
- Covertake the magnetic field and the compass needle follows the magnet.
- Dnone of the above
2Earths magnetic field lines run from
- Ageographic east to geographic west.
- Bmagnetic north to magnetic east.
- Cgeographic south to geographic north
- Dmagnetic east to magnetic west.
3The magnetic field of a magnet is strongest________ the magnet.
- Aat the center of
- Bfar away from
- Cperpendicular to
- Dnear the poles of
4transformers can...
- Adecrease the voltage
- Bincrease or decrease voltage.
- Cneither increase nor decrease voltage.
- Dincrease voltage.
5magnetic fields are produced by ...
- Awater currents
- Bgravitational force
- Celectric currents
- Dpolarities
6a region where a magnetic force can be detected is a(n)...
- Aelectric circuit
- Bpotential circuit
- Cmagnetic field
- Dgravitational attraction
7the use of electromagnetism in power plants supplies most of the worlds...
- Amagnetic fields
- Belectricity
- Cmagnetism
- Delectric fields
8the needle of a compass placed near a current- carrying wire will...
- Aalways point south
- Balways point north
- Calign with the magnetic field produced by the current
- Dcreate a magnetic field
9a device that produces a magnetic field by wrapping wire into a coil is a...
- Adomain
- Bsolenoid
- Cbar magnet
- Dpole
10the strength of a magnetic field created by the current in a wire can be increased by
- Ausing shorter wire
- Bdecreasing the current in the wire
- Cusing longer wire
- Dwrapping the wire into a coil
11magnetic force is the force due to interacting...
- Apermanent magnets
- Bmagnetic fields
- Cobjects
- Dpoles.
12when a magnetic field is applied near iron, the iron's domains
- Ascatter and increase the irons magnetic field.
- Balign and increase the irons magnetic field
- Cscatter and decrease the irons magnetic field
- Dalign and decrease the irons magnetic field
13a ________ transformer is used near homes to achieve a voltage of 120V
- Astep-up
- Bprimary coil
- Csecondary- coil
- Dstep down
14what are the 3 metals that can be considered magnetic since their electron shells are half filled?
- Anickel, silver, gold
- Biron, nickel, and cobalt
- Ccopper, iron, magnesium
- Diron, hydrogen, and helium
15magnetism is caused by
- Amoving electric charges
- Bcanceling charges
- Clike charges
- Dopposite charges
16earth's magnetic poles are located in
- ACanada & Alaska
- BCanada & Antarctica
- Cthe same places as the geographic poles
- DCanada & Australia
17magnetic fields exist
- Afarther away from a magnet
- Bwithin a magnet
- Cnear a magnet
- Dall of the above
18an electric motor and a generator are similar in that both...
- Acreate energy
- Bproduce mechanical energy
- Cuse electricity
- Dtransform mechanical energy into electrical energy or vise versa
19_____ poles of a magnet repel, while _____ poles attract one another.
- Asouth, north
- Bopposite, like
- Cnorth, south
- Dlike, opposite
20it only takes _______ amps/s to stop the human heart.
- A3
- B2.5
- C2
- D1
21the north pole of one magnet will be attracted to...
- Athe middle of the magnet
- Banother north pole
- Cthe south pole of another magnet
- Dall of the above
22in a magnetized substance, the domains
- Acancel each other
- Bare randomly distributed
- Clined up more uniformly in one direction
- Dcan never be reinforced
23magnetically soft substances...
- Acannot be magnetized easily
- Bretain their magnetism longer than others
- Cpick up more iron nails than magnetically hard substances
- Dlose their magnetism more easily than others
24the strength of the magnetic field of a magnet will
- Aremain the same at any distance from a magnet
- Bdecrease as the distance is increased between 2 magnets
- Cincrease as the distance is increased between 2 magnets
- Ddecrease as the distance is decreased between 2 magnets
25the more crowded the field lines are at the poles, the _________ the magnetic field is.
- Aequal
- Bnone of the above
- Cstronger
- Dweaker
26if you split a magnet in half, you will have...
- A2 magnets with only south ends
- B2 magnets one with only north ends
- Cit won't be a magnet any more
- D2 magnets with both a north and a south end
27a galvanometer uses an electromagnet to detect and measure the ____ in a circuit.
- Aelectric current
- Bdomains
- Ccomponents
- Dmagnetism
28what material was used to make the first compass
- Asteel
- Blimestone
- Ciron
- Dlodestone
29magnetic field lines always form
- Aclosed loops
- Bstraight lines
- Cintersecting lines
- Dellipses
30what causes a compass needle to point to geographic north?
- Athe force of earth's rotation causes the needle of the compass to seek the north pole.
- Bthe compass needle aligns with earth's magnetic field
- Cthe pole of the compass is attracted to earth's geographic north pole
- Dall of the above
Informações
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- Quiz sobre Sem título, criado por Brooklyn Gossett em 07-05-2019.
- Autor
- Brooklyn Gossett
- Idioma
- English
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