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block

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

Select the correct answer(s).  

(0/0)

---

0.1 Hz

0.5 Hz

5.0 Hz

10.0 Hz

none

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

Select the correct answer(s).  

(0/0)

---

sinusoidal

absent

downward

upward

none

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

Select the correct answer(s).  

(0/0)

---

reactor

filter

resistor

transistor

none

A combination of electronic components designed to increase the power, voltage or current of a signal

Select the correct answer(s).  

(0/0)

---

master gain control

amplifier

sensitivity

line filter

none

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)

Select the correct answer(s).  

(0/0)

---

E=IRor(V=IR)

I=E/Ror(I=V/R)

R=E/I or(R=V/I)

R=EIor(R=VI)

none

A high frequency setting of 35 Hz would attenuate 50 Hz muscle activity by approximately what percentage?

Select the correct answer(s).  

(0/0)

---

20%

40%

100%

10%

none

The basic unit of resistance is ______.

Select the correct answer(s).  

(0/0)

---

Ohm

Coulomb

Volt

Amphere

none

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

Select the correct answer(s).  

(0/0)

---

Kilocycles

Hertz

Volts

Cycles per second

none

According to ACNS Guidelines, Recording Clinical EEG on Digital Media requires monitors to have _____.

Select the correct answer(s).  

(0/0)

---

Between 25 and 35 mm/second horizontal scaling and a maximum of 1000 data points/second to accurately display EEG on the monitor screen.

Between 25 and 35 mm/second horizontal scaling and a minimum of 100 data points /second to accurately display EEG on the monitor screen.

Between 25 and 35 mm/second horizontal scaling and a maximum of 100 data points/second to accurately display EEG on the monitor screen.

Between 25 and 35 mm/second horizontal scaling and a minimum of 1000 data points/second to accurately display EEG on the monitor screen.

none

The basic unit for measuring current flow is ____.

Select the correct answer(s).  

(0/0)

---

Ampere

Volt

Atomic Weight

Coulomb

none

Common Mode Rejection is ____

Select the correct answer(s).  

(0/0)

---

is dependent on the sampling rate

the characteristic of an amplifier that rejects external interference

controlled by the 60-cycle notch filter

the ability of an amplifier to cancel out ECG artifact

none

A small fluctuating output recorded by the EEG instrument even when there is no input signal is called ____.

Select the correct answer(s).  

(0/0)

---

linear distortion

output voltage

noise

60 Hz interference

none

Which of the following describes the action of a capacitor?

Select the correct answer(s).  

(0/0)

---

opposes changes in current flow

converts alternating current to direct current

creates a direct current resistance

stores energy

none

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?

Select the correct answer(s).  

(0/0)

---

spike 10mm, wave 10 mm

spike 10 mm, wave 6 mm

spike 6 mm, wave 6 mm

spike 6 mm, wave 10 mm

none

Time constant is defined as the time required ____.

Select the correct answer(s).  

(0/0)

---

for the deflection to fall (decay) 57% of the peak deflection

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

for the deflection to fall (decay) to 47% of the peak deflection

for the deflection to fall (decay) to 37% of the peak deflection