magnet and magnetic field lines - 题库网 (tiku.one)

1#

96.27: A long straight wire conductor isu1x qq-,c4.jibctw6v *6umyr placed below a compass. When the conventional current in the conductor is from south to 4 qu,uy* -xb6m itw.rc61cvjq north and large, the N pole of the compass:

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.17:Two bar magnets are to be c0, 1 oxm--bdl1xbd/iat8q dhrut in half along the dotted lines shown. None of the pieces are rotated. After the cu ih/dm1-dq08lab -d,b1xo trxt:

A. None of the halves will attract any other.

B. The two halves of each magnet will attract each other.

C. The two halves of each magnet will repel each other.

D. The two halves of the top magnet will repel, the two halves of the bottom magnet will attract.

E. The two halves of the top magnet will attract, the two halves of the bottom magnet will repel.

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

98.21: The diagram to the right depicts iron filings sprinkled around op+h vc* p,x(vd6dvl 4three permanent magnets. Pole R is the sam 6x*vpc vod(d4l,p+vhe as poles

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.04: If conventionaldasi hm2.wvos .w(* e7 (positive) electric current flows from left to right in a wire as shown in the diagram, what is the direction of the magnetic fih. 2*wsamseow(dv . 7ield at point P?

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.02: An electric cuy9f en9ulgq8,2h/ od m) w;htcrrent flows through a horizontal wire from left to right as shown in the accompanying diagram. Whichh)foc2nd mlhyu,gq;8e t/w 99 option best represents the direction of the magnetic field at point P?

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.41: From our current understanding of physics, which rep9gobe):t1 w( xy.-yqrvx * kdsk:l0t sresentation of magnetic fiexs:x(ygrl0 qk-:bvwy1sdk9tt* e)o.ld lines is inconsistent? The squares in the diagrams below simply represent regions of space.

A. B. C. D.

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.28: A long straight wire has a conventional current dire li7r rz0/kjqya w 9lfqc60i3:cted into the plane of the page as shown in the figure. Which one of the arrows shown best indicates the direction of the magnetic field associated with this wire at the lo/ alr0f6lcq3 0ri 9j: wkiyq7zcation labeled P?

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.33: Two long wires are fixed in space so that the conventiona5c*qo g,j.pmrq.a1 vwcoi7 o0l current in the left wire (2 A) comes out of the plane of the page and the conventional current in the right wire (3 A) goes into the plane of the page. In which Region(s) is there a place on the x-axis (aside from infinity) at which the magnetic fieldm.w aooc.g75oc *qr ip0j ,v1q is equal to zero from these currents?

A. Only in Region I

B. In both Regions I and II

C. Only in Region II

D. In both Regions I and III

E. In both Regions II and IIID. electric field strength divided by magnetic field strength

F. charge divided by mass

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.31: Two very long current-carrying wires are shown end on in )) 2za h(y)im:,ybkfka i:eqanna1m1the figure below. Thif1:: m )hk1qi)an(myya z)a2bk, na ee wire on
the left has a 4A current going into of the plane of the paper and the wire on the right has a 3A
current coming out of the paper. Disregarding the case of x → ±∞, in which region(s) could the
magnetic field from these two wires add to zero on the x-axis.

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.31: A compass is placed near a coil cs7yu685,zzn aq5 mmb of wire. A conventional electrical current is then run through the coil from left to right as shown. This will cause the North p58szq5 uy67 cm,zmnba ole of the compass to:

A. point toward the left

B. point toward the right

C. point toward the bottom of the paper

D. not move since the magnetic field of the coil is into the paper

E. not move since the magnetic field of the coil is out of the paper

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.19: The magnetic field lin2oyyix:,0 icqa c7 po: e)j9jee passing through point P inside the solenoid shown , c o7i:)io2eqy90eyp x aj:cjis
directed

A. to the right.

B. to the left.

C. downward the bottom of the page.

D. upward toward the top of the page.

E. in no direction since the magnetic field is zero.

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.36:When one compute the square root of the ratio of the permeability of free space to the
permittivity of free space, one obtains $\sqrt{\frac{\mu_0}{\varepsilon_0}}$= 377. What is the unit of this quantity?

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