Test
Ch.24
Crea una cuenta gratis para terminar este test
Guarda tu progreso y consulta tu resultado final.
¿Ya tienes cuenta? Inicia sesión
Preguntas del test (21)
1The force that acts between a pair of magnetic poles depends on
- Aseparation distance.
- Bmagnetic pole strength
- Cboth of these
- Dneither of these
2Whereas electric charges can be isolated, magnetic poles
- Acan also.
- Bgather in clusters.
- Ccannot.
- Dnone of the above
3 If you break a bar magnet in half you'll
- Adestroy its magnetic properties.
- Bhave two and a half magnets.
- Chave two magnets.
- Dnone of the above
4Surrounding every magnet is
- Aan electric field.
- Ba magnetic field.
- Cboth of these
- Dneither of these
5Surrounding every moving electron is
- Aa magnetic field.
- Ban electric field.
- Cboth of these
- Dneither of these
6The conventional direction of magnetic field lines outside a magnet are from
- Anorth to south.
- Beither way
- Csouth to north.
7 Magnetic field strength about a magnet is strongest where magnetic field lines are
- Amost curved.
- Bmore spread.
- Ccloser together.
- Dstraightest.
8The end of a compass needle that points to the south pole of a magnet is the
- Asouth pole.
- Bnorth pole.
- Cboth of these
9Magnetic domains normally occur in
- Airon.
- Bsilver.
- Ccopper.
- Dall of the above
- Enone of the above
10Wood does not have magnetic properties because it contains no
- Amoving electrons.
- Biron or other metals.
- Cmagnetic domains.
- Dnone of the above
11The shape of a magnetic field surrounding a current-carrying conductor is
- Aradial.
- Bconsistent with the inverse-square law.
- Ccircular.
- Dall of these
- Eneither of these
12Magnetic field lines about a current-carrying wire
- Aextend radially from the wire.
- Bcircle the wire in closed loops.
- Cboth of these
- Dneither of these
13When current reverses direction in a wire, the surrounding magnetic field
- Aexpands.
- Bcontracts.
- Calso reverses direction.
- Dbecomes momentarily stronger.
14As the number of loops in a current-carrying wire is increased, the
- Aweaker the current.
- Bmore spread out is the magnetic field.
- Cstronger the enclosed magnetic field.
- Dgreater the back emf.
15 A current-carrying coil of wire is
- Aa superconducting magnet.
- Ba superconductor.
- Can electromagnet.
- Da magplane in the making.
16Place an iron rod inside a current-carrying coil of wire and you
- Aa magplane in the making.
- Bincrease the strength of the electromagnet.
- Chave a superconducting magnet.
17Magnet A has twice the magnetic field strength of Magnet B and at a certain distance pulls on magnet B with a force of 100 N. The amount of force that magnet A exerts on magnet B is
- Aat or about 50 N.
- Bexactly 100 N.
- Cneed more information
18Compared to the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is
- Ainversely proportional to their masses.
- Brelatively small.
- Cequally huge.
19Over geologic history the Earth's magnetic field
- Ahas reversed direction many times.
- Bhas increased in strength exponentially.
- Chas been relatively stable.
- Dis unknown.
20Solar winds headed in Earth's direction are deviated mainly by
- AEarth's magnetic field.
- BEarth's radiation belts.
- Cthe upper atmosphere.
- Dthe troposphere.
21Pigeons navigate primarily by
- Aa keen sense of smell.
- Bmagnetic sensors in their heads.
- Ca good memory.
- Dultra-high-pitched sounds.
- Enone of the above
Información
- Descripción
- IDK (PHYS 101 Practice Tests) Physics Test sobre Ch.24, creado por Winston Schultz el 16/12/2015.
- Autor
- Winston Schultz
- Idioma
- English
- Visitas
- 2
- Etiquetas
- Valoración
- Aún sin valoraciones Valora este test