Csec Electrical and Electronic Technolohy PDF
Csec Electrical and Electronic Technolohy PDF
Csec Electrical and Electronic Technolohy PDF
Electronic Technolohy
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csec electrical and electronic technolohy
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cause the current flow to (A) photo cell
(B) Carbon
(A) double (C) Batteries
(B) halve (D) 0enerators
(C) remain unchanged
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(D) quadruple
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. #n order to connect Batter/ and Batter/ 3 in
parallel4 their terminals should be connected
(A) 5 with 53 and 6 with 63
2. hich of the following materials has (B) 5 with 63 and 6 with 53
a negative temperature coefficient! (C) 6 with 53
(D) 63 with 5
(A) Brass
*. #t is advisable4 not to use ater for
(B) "ilicon
(C) #ron e7tinguishing electrical fires because
(D) EmailCopper water
2'. Mell/
(D) ,un cold water over the area
I/ll I/lL $$. %he resistance of a conductor is &.&-
ohms. hat current is required to pass
through it to give a >olt drop!
% % (A) $&A
O
(B) &A
O
%he two suspendedO
electrical charges (C) &A
illustrated above would (D) 12&A
(A) attract each other
(B) repel each other $. 9lectrical generating utilities in the
(C) rotate Caribbean distribute power at
(D) >ibrate frequencies of
(A) 1-2.'>
(B) 1=.>
(C) $$=.>
(D) $*.*>
.
=. hich of the following circuits will
dissipate the most power!
Cancel Anytime.
unchanged.
(D) %he current rating is multiplied b/
the voltage drop
"9C%#8: 2
Cndidtes M&ST ns"er A'' SI( questions in this section.
2. %he figure below shows the dials of a five dial wattOhour meter for a N<" customer.
Calculate how much it would cost the customer for the one month period if he previous
reading was 111 and the rate is Q=.2-@?;. ($ mars)
PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
'
PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
$. (a) "tate 8hmHs +aw and write the formula that represents 8hms +aw. (2 mars)
(b) igure 1 shows a series parallel resistive circuit.
igure 1
Calculate the
)i* %otal resistance when the switch " is closed )# mr$*
)ii* %otal resistance when the switch " is open )# mr$*
)iii* %otal current # when the switch " is closed )# mr$*
)i+* Ra7imum power developed in the =L resistor. ), mr$s*
Totl - mr$s
. (a) "tate %8 (2) reasons wh/ cells are connected in parallel. ) mr$s*
(b) "tate %8 advantages of an alaline cell over a leadOacid cell. ) mr$s*
(c) A commercial batter/4 with an open circuit voltage of 1.>4 has a
terminal voltage of 12.2> when suppl/ing a current of 2&A to a load.
Calculate the internal resistance of the batter/. )/ mr$s*
Totl - mr$s
-. (a) :ame %;,99 factors which affect the resistance of a metallic conductor.
)/ mr$s*
(b) A copper cable 1-&& m long4 has a crossOsectional area of 2- 7 1&O. %he
resistivit/ of copper is 1.* 7 1&O S m.
Calculate the resistance of the cable )/ mr$s*
(B) #ndicate the following values on the setch in part (A) aboveI
Mr$s*
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