EEG Exam Prep 2026/2027: 326 Practice
Questions & Answers | Neurodiagnostic
Board Review for ABRET, ABPN & ACNS
Guidelines
Description:
Master EEG board exams 2026/2027 with 326 clinically-focused practice questions
covering neuroanatomy, digital EEG, epilepsy, and ACNS guidelines. Includes detailed
answers and explanations.
Download the 2026/2027 EEG Board Review Now and Ace Your Neurodiagnostic Certification!
, EEG Exam Prep 2026/2027: 326 Questions & Answers
SECTION A: ELECTRICAL FUNDAMENTALS AND MEASUREMENT
Question 1
The fundamental unit for quantifying current flow is the:
A. Volt
B. Ohm
C. Ampere
D. Coulomb
Answer: C. Ampere
Explanation: The ampere (A) is the SI base unit of electric current, representing the flow of
one coulomb of charge per second. This is distinct from the volt (electromotive force), ohm
(resistance), and coulomb (charge quantity).
Question 2
The basic unit for measuring electrical resistance is the:
A. Volt
B. Ohm
C. Ampere
D. Siemens
Answer: B. Ohm
Explanation: The ohm (Ω) quantifies resistance, which is the opposition to current flow in a
conductor. This relationship is fundamental to Ohm's law and circuit analysis.
Question 3
Which of the following expressions does NOT correctly represent 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
Explanation: Ohm's law states that voltage (E or V) equals current (I) multiplied by
resistance (R). Therefore, I = V/R and R = V/I are valid rearrangements. The expression R =
,EI incorrectly suggests resistance equals voltage multiplied by current, which violates Ohm's
law principles.
Question 4
Which of the following is NOT a unit for measuring alternating current frequencies?
A. Cycles per second
B. Volts
C. Hertz
D. Kilocycles
Answer: B. Volts
Explanation: Frequency is measured in hertz (Hz), cycles per second, or kilocycles (kHz).
The volt is a measure of electrical potential or electromotive force, not frequency.
Question 5
What is the primary function of a capacitor in an electronic circuit?
A. Opposes changes in current flow
B. Converts alternating current to direct current
C. Creates direct current resistance
D. Stores electrical energy in an electrostatic field
Answer: D. Stores electrical energy in an electrostatic field
Explanation: Capacitors store energy in an electrostatic field between two conductive plates
separated by an insulator. They oppose changes in voltage, not current (which is the function
of inductors). The conversion of AC to DC is accomplished by rectifiers.
Question 6
In an EEG instrument, what component transforms alternating current into the direct current
required for operation?
A. The differential amplifier
B. The power supply
C. The filter system
D. The calibration circuit
Answer: B. The power supply
, Explanation: The power supply contains rectification circuitry that converts AC mains
voltage to the DC voltages required by the instrument's components. This includes regulation
circuitry to maintain stable output despite input fluctuations.
SECTION B: EEG INSTRUMENTATION AND SIGNAL PROCESSING
Question 7
A small fluctuating output recorded by the EEG instrument even when no input signal is
present is called:
A. Output voltage
B. Linear distortion
C. 60 Hz interference
D. Noise
Answer: D. Noise
Explanation: Noise represents unwanted random signals arising from various sources
including thermal effects, component imperfections, and electromagnetic interference. This
inherent background activity sets the lower limit of signal detection.
Question 8
The EEG amplifier is designed so that when input 1 is more negative than input 2, the
deflection will be:
A. Upward
B. Downward
C. No deflection
D. Variable depending on sensitivity
Answer: A. Upward
Explanation: By convention, EEG amplifiers are calibrated so that when input 1 (G1) is
negative relative to input 2 (G2), the pen deflects upward. This standardization ensures
consistent interpretation across laboratories.
Question 9
What is common mode rejection?
A. The amplification of all signals equally
B. The characteristic of an amplifier that rejects external interference
Questions & Answers | Neurodiagnostic
Board Review for ABRET, ABPN & ACNS
Guidelines
Description:
Master EEG board exams 2026/2027 with 326 clinically-focused practice questions
covering neuroanatomy, digital EEG, epilepsy, and ACNS guidelines. Includes detailed
answers and explanations.
Download the 2026/2027 EEG Board Review Now and Ace Your Neurodiagnostic Certification!
, EEG Exam Prep 2026/2027: 326 Questions & Answers
SECTION A: ELECTRICAL FUNDAMENTALS AND MEASUREMENT
Question 1
The fundamental unit for quantifying current flow is the:
A. Volt
B. Ohm
C. Ampere
D. Coulomb
Answer: C. Ampere
Explanation: The ampere (A) is the SI base unit of electric current, representing the flow of
one coulomb of charge per second. This is distinct from the volt (electromotive force), ohm
(resistance), and coulomb (charge quantity).
Question 2
The basic unit for measuring electrical resistance is the:
A. Volt
B. Ohm
C. Ampere
D. Siemens
Answer: B. Ohm
Explanation: The ohm (Ω) quantifies resistance, which is the opposition to current flow in a
conductor. This relationship is fundamental to Ohm's law and circuit analysis.
Question 3
Which of the following expressions does NOT correctly represent 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
Explanation: Ohm's law states that voltage (E or V) equals current (I) multiplied by
resistance (R). Therefore, I = V/R and R = V/I are valid rearrangements. The expression R =
,EI incorrectly suggests resistance equals voltage multiplied by current, which violates Ohm's
law principles.
Question 4
Which of the following is NOT a unit for measuring alternating current frequencies?
A. Cycles per second
B. Volts
C. Hertz
D. Kilocycles
Answer: B. Volts
Explanation: Frequency is measured in hertz (Hz), cycles per second, or kilocycles (kHz).
The volt is a measure of electrical potential or electromotive force, not frequency.
Question 5
What is the primary function of a capacitor in an electronic circuit?
A. Opposes changes in current flow
B. Converts alternating current to direct current
C. Creates direct current resistance
D. Stores electrical energy in an electrostatic field
Answer: D. Stores electrical energy in an electrostatic field
Explanation: Capacitors store energy in an electrostatic field between two conductive plates
separated by an insulator. They oppose changes in voltage, not current (which is the function
of inductors). The conversion of AC to DC is accomplished by rectifiers.
Question 6
In an EEG instrument, what component transforms alternating current into the direct current
required for operation?
A. The differential amplifier
B. The power supply
C. The filter system
D. The calibration circuit
Answer: B. The power supply
, Explanation: The power supply contains rectification circuitry that converts AC mains
voltage to the DC voltages required by the instrument's components. This includes regulation
circuitry to maintain stable output despite input fluctuations.
SECTION B: EEG INSTRUMENTATION AND SIGNAL PROCESSING
Question 7
A small fluctuating output recorded by the EEG instrument even when no input signal is
present is called:
A. Output voltage
B. Linear distortion
C. 60 Hz interference
D. Noise
Answer: D. Noise
Explanation: Noise represents unwanted random signals arising from various sources
including thermal effects, component imperfections, and electromagnetic interference. This
inherent background activity sets the lower limit of signal detection.
Question 8
The EEG amplifier is designed so that when input 1 is more negative than input 2, the
deflection will be:
A. Upward
B. Downward
C. No deflection
D. Variable depending on sensitivity
Answer: A. Upward
Explanation: By convention, EEG amplifiers are calibrated so that when input 1 (G1) is
negative relative to input 2 (G2), the pen deflects upward. This standardization ensures
consistent interpretation across laboratories.
Question 9
What is common mode rejection?
A. The amplification of all signals equally
B. The characteristic of an amplifier that rejects external interference
