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ABRET Actual EXAM Newest 2025-2026 Complete All Questions And Correct Detailed Answers (Verified Answers) |Already Graded A+||Brand New Version!
In a differential amplifier, if input 1 received a volt of +50mv and input
- of -100mv, the output volt would be
- 150 upward
- 50 upward
- 150 downward
- 50 downward - ANSWER-d
What happens when a 60 cycle sine wave is sampled at 100Hz?
- subharmonic response
- aliasing
- digital filtering
- overlap data - ANSWER-b
Converts an analog signal into a series of digital binary numbers
- fast fourier transform
- impedance meter
- differential amplifier 1 / 4
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d) A/D converter - ANSWER-d
CMRR of at least
- 70Hz
- 90Hz
- 90dB
- 70dB - ANSWER-c
Gradual changes in amp, freq, or spatial distribution of rhythms
- background activity
- asymmetry
- attenuation
- evolution - ANSWER-d
Time constant that best displays delta activity
- 0.3 sec
- 0.1 sec
- 1 sec
- 0.5 sec - ANSWER-c
60Hz notch filter would have the greatest effect on a waveform w/ a duration of 2 / 4
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- 10msec
- 16msec
- 50msec
- 25msec - ANSWER-b
All favor cancellation of signals, except
- equal impedances in the inputs
- unequal impedances in the inputs
- shorter inter-electrode distance
- cerebral potentials in common mode - ANSWER-b
Most appropriate sampling rate that should be used for a 70Hz HFF, according to Nyquist theory
- 210 p/sec
- 10 p/sec
- 140 p/sec
- 20 p/sec - ANSWER-c
Time constant of 0.5sec
- 15Hz low pass filter
- 0.3Hz high pass filter
- 5Hz low filter 3 / 4
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- 35Hz high filter - ANSWER-b
0.3Hz wave would be attenuated by what percent w/ 0.3Hz filter?
- 0.5
- 0.3
- 0.7
- unaffected - ANSWER-b
Time constant
- time axis
- low frequency filter
- gain
- sensitivity - ANSWER-b
Low sampling rate may cause fast freq to appear slower
- long time constant
- overfiltering
- low impact impedance
- aliasing - ANSWER-d
5Hz LFF will attenuate a 5Hz wave by
- 5mm
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