Current Electricity 3

 

2. 

Twj gcfbkiet fbkps _ bed S bri discheid tj jpirbti bt ejrkbf lrchoteiss woie toi pjtietcbf dcggirieai barjss toi fbkps cs 7 W. Ibao fbkp wcff `ust fchot woie toi pjtietcbf dcggirieai barjss ct cs 1 W. Toi twj fbkps bri ajeeiatid ce pbrbffif tj b 4 W suppfy jg eihfchclfi cetirebf riscstbeai bs sojwe lifjw. 4W

_

S

 

Toi gcfbkiet jg fbkp _ lribms sj tobt toiri cs ej aurriet ce ct. Toi gcfbkiet jg fbkp S wcff B.

hfjw bt ejrkbf lrchoteiss.

L.

hfjw bt kjri tobe ejrkbf lrchoteiss.

A.

hfjw kjri dckfy.

D.

stby bt toi sbki lrchoteiss. (2)  

 

2

 

W suppfy. >

+3.> W

1>>>

1>>>

_

S

P

W 

 

\iscstjrs _ bed P bri gcxid riscstjrs jg riscstbeai 1>>> !. Toi riscstbeai jg riscstjr S kby li vbrcid litwiie zirj bed 1>>> !. Xocao jg toi gjffjwceh hcvis toi kbxckuk rbehi jg pjtietcbf dcggirieai _ bed S: B.

> tj 7.> W

L.

1.> W tj 7.> W

A.

4.9 W tj 7.> W

D.

4.9 W tj 3.> W

W  barjss   barjss

toi riscstjrs

(2)  

1. 

Toi wjrm djei je b pjsctcvi pjcet aobrhi jg kbhectudi 1.> eA bs ct cs kjvid bt ajestbet spiid grjk jei pjcet tj bejtoir cs 2< e@. Toi pjtietcbf dcggirieai litwiie toi twj pjcets cs B.

>.> W.

L.

>. W.

D.

17 W. (2)  

 

<

 

4. 

Toi hrbpo lifjw sojws toi vbrcbtcje wcto aurriet  C  jg   jg toi pjtietcbf dcggirieai W  barjss  barjss b gcfbkiet fbkp.  / vjfts W  /

2.<

2.>

>.?

>.7

>.4

>.<

>.> >.>

>.9

2.>

2.9

 C  /  / kB 

Toi riscstbeai jg toi fbkp woie  C  ;  ; 2.9 kB cs B.

39> !.

L.

4>> !.

A.

>.39 !.

D.

>.4> !. (2)  

 

1

 

9. 

B vjftkitir jg riscstbeai 9> m ! cs ajeeiatid ce b acrauct bs sojwe ce toi dcbhrbk lifjw.

i.k.g. ; 2m 

 \

2>m 

 

Toi ikg jg toi lbttiry cs 2< W bed toi riscstbeai jg toi riscstjr cs 2> m !. Toi cetirebf riscstbeai jg toi lbttiry cs eihfchclfi. Toi ribdceh jg toi vjftkitir cs B.

>.> W.

L.

W.

A.

2> W.

D.

2< W. (2)  

7. 

Torii cdietcabf riscstjrs jg ajestbet riscstbeai bri ajeeiatid ce sircis tj b lbttiry jg eihfchclfi cetirebf riscstbeai. Toi tjtbf pjwir dcsscpbtid ce toi acrauct cs  ^ . Toi torii riscstjrs bri ejw ajeeiatid ce pbrbffif. Toi tjtbf pjwir dcsscpbtid cs B.

 ^ 

1

. 

L.

 ^ .

A.

1 ^ .

D.

3 ^ . (2)  

 

4

 

8. 

B kitbf ajeduatjr cs eihbtcvify aobrhid. Ct cs ajeeiatid tj ibrto usceh b kitbf wcri, bs cffustrbtid lifjw.

eihbtcvify-aobrhid ajeduatjr 

wcri

ibrto

 

Xobt cs toi kjvikiet jg aobrhi bs toi ajeduatjr cs ibrtoid:

 

B.

^jsctcvi aobrhi kjvis grjk ibrto tj toi ajeduatjr.

L.

Eihbtcvi aobrhi kjvis tj ibrto grjk toi ajeduatjr.

A.

Eihbtcvi aobrhi kjvis grjk toi ajeduatjr bed pjsctcvi aobrhi kjvis grjk ibrto.

D.

^jsctcvi aobrhi grjk toi wcri kjvis tj toi ajeduatjr bed eihbtcvi aobrhi kjvis tj ibrto.

(2)

9

 

?. 

Toi hrbpo sojws toi aurriet-vjftbhi aurriet-vjft bhi ( C -W ) aobrbatircstca jg be ifiatrcabf ajkpjeiet.  C 

 C 2

>

>

W >

 

W 2

 

Xobt cs toi riscstbeai jg toi ajkpjeiet bt b pjtietcbf dcggirieai aobehi, cg bt bff, litwiie pjtietcbf dcggirieais W > bed W 2.

riscstbeai bt

B.

L.

A.

D.

(W 2  ! W    >)  C 2

(W 2  ! W    >)  C < W 2  C 2 W 2  C 2

W  2 

W    W 2 bed

ojw djis toi riscstbeai

aobehi litwiie W > bed W 2 

 

ej aobehi

 

diaribsis

 

ej aobehi

 

diaribsis (2)

 

7

 

3. 

Torii riscstjrs ^, R bed \, bri ibao fbliffid 2>>

!.

Toiy bri ajeeiatid bs sojwe. _

R

^

\ 

S 

Toi tjtbf riscstbeai, woie kibsurid litwiie pjcets _ bed S, cs gjued tj li >

!.

Xobt cs toi ajrriat ixpfbebtcje gjr toi riscstbeai ribdceh: B.

\iscstjr \ cs zirj

L.

\iscstjr \ cs cegcecti

A.

\iscstjr ^ cs zirj

D.

\iscstjr ^ cs cegcecti (2)

 

8

 

2>. 

Torii eitwjrms _, S bed P bri sojwe lifjw. Ibao riscstjr obs toi sbki riscstbeai.

 

_

S

 

P

 

Xocao fcst sojws toi eitwjrm riscstbeais ce cearibsceh jrdir jg kbhectudi: fibst " hribtist B.

_

S

P

L.

S

_

P

A.

S

P

_

D.

P

_

S (2)

22. 

Xocao jg toi gjffjwceh cs b uect gjr ifiatrcabf riscstbeai:  ‑<

B.

XB  

L.

BW  

A.

WX s

D.

XW  

 ‑2

 ‑<

 ‑<

(2)

 

?

 

2

A.

L.

W 

 

C 

> >

> >

 

D.

W 

 

C 

 

W 

 

C 

 

C 

W 

> >

 

 

(2)

2>

 

24. 

Ce toi acrauct lifjw, toi lbttiry obs eihfchclfi cetirebf riscstbeai. Torii cdietcabf fbkps F, K bed E jg ajestbet riscstbeai bri ajeeiatid bs sojwe.

Toi gcfbkiet jg fbkp E lribms. Xocao jg toi gjffjwceh sojws toi sulsiquiet aobehis tj toi  lrchoteiss jg fbkp F bed fbkp K: K: Fbkp F

Fbkp K

B.

stbys toi sbki

diaribsis

L.

cearibsis

stbys toi sbki

A.

cearibsis

diaribsis

D.

diaribsis

cearibsis (2)

 

22

 

29. 

Ce toi acrauct lifjw, toi vjftkitir obs b riscstbeai 2>> m !. Toi lbttiry obs eihfchclfi cetirebf riscstbeai bed ikg 7 W.

Toi ribdceh je toi vjftkitir cs B.

> W.

L.

< W.

A.

1 W.

D.

4 W. (2)

 

2<

 

27. 

Ce toi acrauct sojwe lifjw, toi aiff obs eihfchclfi cetirebf riscstbeai.

Xocao jg toi gjffjwceh iqubtcjes cs ajrriat: B.

 C 2 ;