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EMTL IMPORTANT QUESTIONSUNIT-I

1. (a) State Coulombs la !" ele#t$ostat!#s a"% $!te !ts A&&l!#at!o"s.

(b) Obta!" a" e'uat!o" o$ o$#e o" a &o!"t # a$*e Q %ue to N &o# a$*es !" t e !el%.

+. (a) ,e !"e %! e$e"t # a$*e %!st$!but!o"s. (b) $!te a" !/e a&&l!#at!o"s o ele#t$ostat!#s.

0. (a) ,e !"e ele#t$!# !el% st$e"*t . (b) ,e$!/e a" e &$ess!o" o$ ele#t$!# !el% !"te"s!t %ue to !" !"!te# a$*e lo#ate% alo"* 2-a !s $om -3 to 3.

4. (a) Obta!" a" e &$ess!o" o$ ele#t$!# !el% !"te"s!t %ue to !" !"!te s# a$*e s eet. (b) A" !" !"!te # a$*e s eet !" 56-&la"e e te"%!"* $om -3 to 3 !" bot%!$e#t!o"s as a u"! o$m # a$*e %e"s!t 17"C8m9. !"% ele#t$!# !el% a (#) A s& e$e o /olume 7.1m; as a # a$*e %e"s!t o . (a) State Coulombs la . (b) Po!"t # a$*es Q1 a"% Q+ a$e $es&e#t!/el lo#ate% at (4=7=-0) a"%

(+=7=1).! Q1:4"# !"% a"ot e$ &o!"t # a$*e e"!) Ele#t$!# !el% !"te"s!t o" a # a$*e at a &o!"t (>=7=?) as"o 2-#om&o"e"t.

!!) @o$#e o" a # a$*e at a &o!"t (>=7=?) as "o -#om&o"e"t.

?. (a) T $ee e'ual # a$*es o + # a$e !" s&a#e at (7=7=7)=(+=7=7) a"% $es&e#t!/el . !"% t e "et o$#e o" Q4:> # at (+=+=7) (b) T o &o!"t # a$*es Q1:>#=Q+:1"# a$e lo#ate% at (-1=1=0)m a"% (0=1=7)m$es&e#t!/el . ,ete$m!"e t e ele#t$!# !el% at Q1.

B. (a) ,e !"e ele#t$!# &ote"t!al. (b) T o &o!"t # a$*es -4 C a"% > C a$e lo#ate% at (+=-1=0) a"% (7$es&e#t!/el . !"% t e &ote"t!al at (1=7=1) assum!"* 2e$o &ote"t!al at !" (#) ,e$!/e a" e &$ess!o" o$ %ue to # a$*e% %!s#

(o$) P$o/e &ote"t!al :(Ds8+o)FGa9H 9 -

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e$e :&ote"t!al at a %!sta"#e $om #e"t$e o ,!s# to t e &o!"t &. a:$a%!us o t e %!s#.

77mm s!%e se&a$ate% 17mm. A slab o sul& u$ ($:4) ?mm t !# !s &la#e% o" t e lo e$ &late a!$ *a& o 4mm. @!"% t e #a&a#!ta"#e o#a&a#!to$>. a) ,e$!/e t e e &$ess!o" o$ #a&a#!ta"#e o #o-a !al #able.

b) ,e$!/e t e e &$ess!o" o$ #a&a#!ta"#e o s& e$!#al #a&a#!to$

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) E &la!" bou"%a$ #o"%!t!o"s o$ stat!# ma*"et!# !el%s?) ,e$!/e ou$ Ma ells e'uat!o"s o$ t!me /a$ !"* ele#t$o ma*"et!#

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