ASET study guides

Question 1

The basic unit for measuring current flow is

Answer 1

Ampere

Question 2

The basic unit of resistance is

Answer 2

Ohm

Question 3

Which of the following is not a valid expression of Ohm’s law

Answer 3

R=E I or (R=V I)

Question 4

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

Answer 4

Volts

Question 5

Which of the following describes the action of a capacitor?

Answer 5

Stores energy

Question 6

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

Answer 6

Filter

Question 7

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

Answer 7

Amplifier

Question 8

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

Answer 8

noise

Question 9

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

Answer 9

upward

Question 10

Common mode rejection is

Answer 10

The characteristic of an amplifier that rejects external interference

Question 11

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

Answer 11

0.1 hz

Question 12

Time constant is defined as the time required

Answer 12

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

Question 13

An EEG record has three per second spike/wave discharges. Both the spike and the slow wave have voltages of 100 uv. If this discharge is recorder with a low frequency filter of 5 hz and a sensitivity of 10 uv/mm, what would be the deflection of the spike and the wave?

Answer 13

Spike 10 mm, wave 6 mm