CBET 2014: Basic Electronics
A few capacitors are in parallel. Calculate the total capacitance. The capacitor values are 1uF,
2uF, 3uF, and 4uF. The total capacitance is: -
10 uF
1μF + 2μF + 3μF + 4μF = 10μF
Solve this binary equation. Answer in a decimal number form. 11011+1111= -
42
An Oscilloscope reads 10 volts peak to peak. What is the RMS voltage? -
3.54 VRMS
Peak Voltage X .707 = RMS voltage
In a capacitive circuit: -
Current leads voltage by 90 degrees
ELI the ICE man. Voltage/current always leads by 90 degrees
A heating element in an infant incubator uses 90 Watts of power and has a resistance of 1 kΩ.
Calculate the current through the heating element. -
300 milliamps: 90W = I² X 1KΩ (90/1000) = I² .09 = I² .3 = I
Power = I² X R
A Triac is used to switch -
AC power
Waveforms on an EEG Monitor are temporarily stored in: -
RAM
A GFCI normally has a trip point of -
6 mA
NFPA 99
The IEEE standard for Ethernet communication: -
802.3
Which one of these has the longest wavelength in the light spectrum: -
Dark Red Light
A Nicad battery normally has: -
1.2 V per cell
A transformer has 1968 primary windings and 492 secondary windings (4:1) and the input
current is 1 amp. Output current is? -
4 A
(4/1) = (1/x) cross multiply 4=x
