Comprehensive Review with Solved Questions
and Accurate Answers | Grade A+ Guaranteed
• The basic unit of resistance is:
a. Ohm
b. Coulomb
c. Ampere
d. Volt . Answer: a. ohm
• Which of the following is NOT a valid expression of Ohm's Law:
a. R=EI or (R=VI)
b. E=IR or (V=IR)
c. I=E/R or (I=V/R)
d. R=E/I or (R=V/I) . Answer: a. R=EI or (R=VI)
• Which of the following is NOT a unit for measuring alternating
frequencies:
a. cycles per second
b. volts
c. hertz
d. kilocycles . Answer: b. volts
,• Which of the following describes the action of a capacitor?
a. opposes changes in current flow
b. converts A/C to D/C
c. creates a direct current resistance
d. stores energy . Answer: d. stores energy
• A circuit that allows some frequencies to pass through it, while others
are blocked is a:
a. resistor
b. transistor
c. filter
d. reactor . Answer: c. filter
• A combination of electronic components designed to increase the
power, voltage or current of a signal:
a. amplifier
b. line filter
c. master gain control
d. sensitivity . Answer: a. amplifier
• A small fluctuating output recorded by the EEG instrument even when
there is no input signal is called:
a. output voltage
b. linear distortion
,c. 60Hz interference
d. noise . Answer: d. noise
• The EEG amplifier is designed so that when input 1 is more negative
than input 2, the deflection will be . Answer: upward
• Common mode rejection is:
a. the ability of an amplifier to cancel out ECG artifact
b. the characteristic of an amplifier that rejects external interference
c. is dependent on the sampling rate
d. controlle by the 60-cycle notch filter . Answer: b. the characteristic of
an amplifier that rejects external interference
• Which of the following is most attenuated by a low frequency filter of
1 Hz?
a. 0.5 Hz
b. 5.0 Hz
c. 10.0 Hz
d. 0.1 Hz . Answer: d. 0.1 Hz
• Time constant is defined as the time required for the deflection to fall
(decay):
a. to 47% of the peak deflection
b. 57% of the peak deflection
, c. 77% of the peak deflection
d. to 37% of the peak deflection . Answer: d. to 37% of the peak
deflection
• An EEG record has 3/sec spike & wave discharges. Both the spike and
the slow wave have voltages of 100uV. If this discharge is recorded with
a LFF of 5Hz and a sensitivity of 10uV/mm, what would be the
deflection of the spike and the wave?
a. spike 10mm & wave 6mm
b. spike 6mm & wave 10mm
c. spike 10mm & wave 10mm
d. spike 6mm & wave 6mm . Answer: a. spike 10mm wave 6mm
• A high frequency setting of 35Hz would attenuate 50Hz muscle
activity by approximately what percentage:
a. 10%
b. 20%
c. 40%
d. 100% . Answer: c. 40%
• According to ACNS Guidelines, Recording on Clinical EEG on Digital
Media requires monitors to have between 25 & 35mm/second horizontal
scaling and a:
a. maximum of 1,000 data points/second to accurately display EEG on
the monitor screen