8/3/2019 1205-1.11A Tng tc gia hai dng in - Lc Lorentz

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H tn: 1205-1.11A

B4 TNG TC GIA HAI DNG IN - LC LORENTZ 02/02/2012

1 Ba dy dn thng di v hn c t song song trong khng gian nh hnh vv cch u nhau 8 cm. Cho ba dng in c cng ln lt l 0,5 A, 1 A v1,2 A chy qua cc si dy. Hy xc nh vect lc t tc dng ln mi mt casi dy.

2 Ba dy dn thng di v hn c t song song trong khng gian nh hnh vv cch u nhau 2 cm. Cho hai dng in c cng ln lt l 1,2 A v 1,5A chy qua hai dy u tin. Hy xc nh chiu v cng ca dng in

chy qua dy th ba bit rng lc t tc dng ln mi mt dy th 2 bng 0.

3 Hai dy dn thng di v hn c t song song trong khng gian, cch nhau6 cm. Cho hai dng in cng chiu c cng ln lt l 0,5 A v 1 A chyqua hai dy. Hi phi t mt dng in thng song song th 3 u lc ttc dng ln mi mt dy ny bng 0?

4 Hai dy dn thng di v hn c t song song trong khng gian, cch nhau10 cm. Cho hai dng in ngc chiu c cng bng nhau 2 A chy quahai dy. t mt dy dn thng khc song song v cch u hai dy ny 6 cm.Khi c dng in 1 A chy qua dy ny th lc t tc dng ln mi mt dy lbao nhiu?

5 Mt ht mang in 3,2.10-19C bay vo trong t trng u c B = 0,5T hp vihng ca ng sc t 300. Lc Lorenx tc dng ln ht c ln 8.10-14N.Vn tc ca ht khi bt u vo trong t trng l bao nhiu?

6 Mt electron chuyn ng vi vn tc 2.106m/s vo trong t trng u B =

0,01T chu tc dng ca lc Lorenx 16.10-16

N

. Gc hp bi vct vn tc vhng ng sc t trng l bao nhiu? me = 9,1.10-31 kg, qe = - 1,6.10-19 C

7 Mt ht mang in chuyn ng trong t trng u, mt phng quo caht vung gc vi ng sc t. Nu ht chuyn ng vi vn tc v1 =1,8.106m/s th lc Lorenx tc dng ln ht l 2.10-6N. Hi nu ht chuynng vi vn tc v2 = 4,5.107m/s th lc Lorenx tc dng ln ht c lnbng bao nhiu?

8 Hai in tch ql = 10C v in tch q2 bay cng hng, cng vn tc vo mtt trng u. Lc Lorentz tc dng ln lt ln ql v q2 l 2.10-8 N v 5.10-8 N.

ln ca in tch q2 l bao nhiu?

Bi tp Tng tc gia hai dng in - Lc Lorentz? 1205-1.11A

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8/3/2019 1205-1.11A Tng tc gia hai dng in - Lc Lorentz

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9 Mt in tch 1 mC c khi lng 10 mg bay vi vn tc 1200 m/s vung gcvi cc ng sc t vo mt t trng u c ln 1,2 T, b qua trng lctc dng ln in tch. Bn knh quo ca n l bao nhiu?

10 Hai in tch c in tch v khi lng ging nhau bay vung vi cc ngsc t vo mt t trng u. B qua ln ca trng lc. in tch 1 bay vivn tc 1000 m/s th c bn knh quo 20 cm. in tch 2 bay vi vn tc1200 m/s th c bn knh quo l bao nhiu?

11 Hai in tch ql = 10C v q2 = -2c c cng khi lng v ban u v baycng hng vo mt t trng u. in tch ql chuyn ng cng chiu kimng h vi bn knh quo 4 cm. in tch q2 chuyn ng theo chiu nov bn knh quo ca n l bao nhiu?

12 Mt electron c bn vo mt t trng u (cm ng t l 5.10-7 T) nhhnh v. ln vn tc l 400 m/s. Hi electron chuyn ng nh th no? me= 9,1.10-31 kg, qe = - 1,6.10-19 C

13 Mt electron c tng tc bi hiu in th 1000V ri cho bay vo trong ttrng u theo phng vung gc vi cc ng sc t. Tnh lc Lorenxtc dng ln n bit me = 9,1.10-31 kg, qe = - 1,6.10-19 C, B = 2T, vn tc ca httrc khi tng tc rt nh.

14 Mt electron c bn vo mt t trng u (cm ng t l 3.10-6 T) nhhnh v. ln vn tc l 3.104 m/s. Hi electron chuyn ng nh th no?

15 Mt electron c bn vo mt in t trng nh hnh v. Quo thng caelectron khng thay i. Xc nh chiu in trng. Nu ln vn tc l3.104 m/s v cng in trng l 40000 V/m th cm ng t l bao nhiu?

16 Mt electron c bn vo mt in t trng nh hnh v. Quo thng caelectron khng thay i. Xc nh chiu ng sc t. Nu ln vn tc l3.104 m/s, cm ng t l 0,05 T, khong cch gia 2 bn l 1 mm th hiu inth cn thit p vo hai bn l bao nhiu?

Bi tp Tng tc gia hai dng in - Lc Lorentz? 1205-1.11A

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