REVIEW QUESTIONS – EEG
WITH CORRECT ANSWERS
2025
1. The basic unit for measuring current flow is ____.
a. atomic weight
b. Coulomb
c. Volt
d. Ampere correct answers >> D. Ampere
2. The basic unit of resistance is ____.
a. Ohm
b. Coulomb
c. Ampere
d. Volt correct answers >> 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)
GRADED A+
,a. R = E I or (R = V I)
b. E = I R or (V = I R)
c. I = E / R or (I = V/R)
d. R = E / I or (R = V/ I) correct answers >> A. R = E I
or (R = V I)
4. Which of the following is not a unit for measuring
alternating frequencies?
a. Cycles per second
b. Volts
c. Hertz
d. Kilocycles correct answers >> 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 correct answers >> D. stores
energy
6. A circuit that allows some frequencies to pass through
it, while others are blocked is a ____.
a. resistor
GRADED A+
,b. transistor
c. filter
d. reactor correct answers >> 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 correct answers >> A. Amplifier
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 correct answers >> 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
GRADED A+
, d. sinusoidal correct answers >> 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 correct
answers >> 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
b. 5.0 Hz
c. 10.0 Hz
d. 0.1 Hz correct answers >> 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
GRADED A+
WITH CORRECT ANSWERS
2025
1. The basic unit for measuring current flow is ____.
a. atomic weight
b. Coulomb
c. Volt
d. Ampere correct answers >> D. Ampere
2. The basic unit of resistance is ____.
a. Ohm
b. Coulomb
c. Ampere
d. Volt correct answers >> 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)
GRADED A+
,a. R = E I or (R = V I)
b. E = I R or (V = I R)
c. I = E / R or (I = V/R)
d. R = E / I or (R = V/ I) correct answers >> A. R = E I
or (R = V I)
4. Which of the following is not a unit for measuring
alternating frequencies?
a. Cycles per second
b. Volts
c. Hertz
d. Kilocycles correct answers >> 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 correct answers >> D. stores
energy
6. A circuit that allows some frequencies to pass through
it, while others are blocked is a ____.
a. resistor
GRADED A+
,b. transistor
c. filter
d. reactor correct answers >> 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 correct answers >> A. Amplifier
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 correct answers >> 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
GRADED A+
, d. sinusoidal correct answers >> 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 correct
answers >> 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
b. 5.0 Hz
c. 10.0 Hz
d. 0.1 Hz correct answers >> 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
GRADED A+
