EEG Review Questions 1-150 Exam with Correct Answers

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EEG Review Questions 1-150 Exam
with Correct Answers

1. The basic unit for measuring current flow is ____.


a. atomic weight


b. Coulomb


c. Volt


d. Ampere - ✔✔D. Ampere


2. The basic unit of resistance is ____.


a. Ohm


b. Coulomb


c. Ampere


d. Volt - ✔✔a. Ohm


3. Which of the following is not a valid expression of Ohm's law?(in this equation E (electromotive force)

is the dame as V (Voltage)


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) - ✔✔a. R=EI or(R=VI)


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4. Which of the following is not a unit for measuring alternating frequencies?


a. Cycles per second


b. Volts


c. Hertz


d. Kilocycles - ✔✔b. Volts


5. Which of the following describes the action of a capacitor?


a. opposes changes in current flow


b. converts alternating current to direct current


c. creates a direct current resistance


d. stores energy - ✔✔d. stores energy


6. A circuit that allows some frequencies to pass through it, while others are blocked is a ____.


a. resistor


b. transistor


c. filter


d. reactor - ✔✔c. filter


7. 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 - ✔✔a. amplifier



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8. 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. 60 Hz interference


d. noise - ✔✔d. noise


9. The EEG amplifier is designed so that when input 1 is more negative than input 2, the deflection will be

____.


a. downward


b. upward


c. absent


d. sinusoidal - ✔✔b. upward


10. 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. controlled by the 60-cycle notch filter - ✔✔b. the characteristic of an amplifier that rejects external

interference


11. Which of the following is most attenuated by a low frequency filter of 1 Hz?


a. 0.5 Hz




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b. 5.0 Hz


c. 10.0 Hz


d. 0.1 Hz - ✔✔d. 0.1 Hz


12. Time constant is defined as the time required ____.


a. for the deflection to fall (decay) to 47% of the peak deflection b. for the deflection to fall (decay) 57% of

the peak deflection


c. for the deflection to fall (decay) 77% of the peak deflection


d. for the deflection to fall (decay) to 37% of the peak deflection - ✔✔d. for the deflection to fall (decay) to

37% of the peak deflection


13. An EEG record has three per second spike/wave discharges. Both the spike and the slow wave have

voltages of 100 μV. If this discharge is recorded with a low frequency filter of 5 Hz and a sensitivity of 10

μV/mm, what would be the deflection of the spike and the wave?


a. spike 10 mm, wave 6 mm


b. spike 6 mm, wave 10 mm


c. spike 10mm, wave 10 mm


d. spike 6 mm, wave 6 mm - ✔✔a. spike 10 mm, wave 6 mm


14. A high frequency setting of 35 Hz would attenuate 50 Hz muscle activity by approximately what

percentage?


a. 10%


b. 20%


c. 40%



Author. Emily Charlene, ©2025 All Rights Reserved.