cameroon gce intermediate level 2024 electrical and electronic circuits 1
cameroon gce intermediate level 2024 electrical and electronic circuits 1
Three identical batteries each of characteristics E
= 36V, internal resistance r = 3.2Q. How should
these batteries be connected in order to satisfy a
load of characteristics; 1000 – 100V
A All tire batteries should be connected in
scries
B All the batteries should be connected in
parallel
C Two batteries should be connected in
scries then in parallel to one
D Two batteries should be connected in
parallel then in scries to one
The power consumed by capacitors are rated in
A KV
B KVA
C KVAR
D KW
18. Two equivalent capacitors in parallel will have as
equivalent capacitance ;
A 2C
B C/2
C C2
D C
Calculate the period of a sine wave of frequency
50Hz.
A T = 0.05sec
B T = 0.5sec
C T = 0.02sec
D T = 0.2sec
19.
1 1 . A zencr diode has the following characteristics :
Vz = 6V, and PDMax = 500mW. Calculate its
maximum current
A 50mA
B 83.3mA
C 0.81mA
D 180.65mA
20. What is the output voltage when four 12 volts
batteries are connected in parallel ?
A 12V
B 24V
C 48V
D 36V
12. A conductor has a length of 250cm, a cross
sectional area of 0.125mm2 and a resistivity of
24xl0‘7ftm. what is its resistance ?
A 148ft
B 100ft
C 48ft
D 25ft 21. A sinusoidal wave has an average value of
127.4V. what is its peak value ?
A 200V
B 220V
C 230V
D 240V
13. Convert the octal number 3048 into decimal.
A 255
B 109
C 196
D 127
22. If the unit of inductance is Henry (H), express
0.000000003H in powers of 10 and write it in its
abbreviated form
A 3MH
B 3pH
C 3pH
D 3nH
14. The function S = ABC + AB + C when
simplified gives
A S = (A+C)(B+C)
B S=AB+C
C S = AB + AC
D A+B+C
23. The logic expression C(C+B) is equivalent to ;
A C
B B
C 1+CB
D 1
15. Give the four bit binary equivalence of the
decimal number 10
A 0010
B 0011
C 0101
D 1010 24. In a series resonance circuit, the impedance of the
circuit is ;
A Average
B Zero
C Minimum
D maximum
16. In a purely resistive circuit ;
A Current lags behind voltage by 90°
B Current can lead or lag behind the voltage
by 90°
C Current lead or lag behind the voltage by
90°
D Current is in phase with the voltage’
