CNIM UPDATED ACTUAL QUESTIONS AND VERIFIED ANSWERS

CNIM UPDATED ACTUAL QUESTIONS AND
VERIFIED ANSWERS

●● Protons
Answer: Positive charge


●● Neutrons
Answer: No charge


●● Coulomb's Law
Answer: The force exerted between two charges is inversely
proportional to the square of the distance between them


●● Voltage
Answer: Electromotive force (volts)


●● Current
Answer: Movement of charge (amperes)


●● Ohm's Law
Answer: Voltage (V) is equal to the product of the current (I) and the
resistance (R)

,●● Resistance
Answer: The opposition to Direct Current (DC) flow


●● Impedance
Answer: The opposition to Alternating Current (AC) flow


●● Resistors in Series
Answer: Current is the same, voltage divides among the resistors


●● Resistors in Parallel
Answer: Voltage is the same, current divides among the resistors


●● Capacitance
Answer: Ability to store charge; unit is Farads


●● Inductance
Answer: Based on the principle that current produces a magnetic field


●● Differential Amplifier Gain
Answer: The Gain of the differential amplifier is equal to the Voltage out
divided by the Voltage in

, ●● Common Mode Rejection Ratio (CMRR)
Answer: A measure of a differential amplifier's ability to eliminate
common mode signals


●● Input Impedance
Answer: The impedance at the amplifier's patient inputs


●● Cutoff Frequency
Answer: The frequency where there is a 3dB or 30% reduction in the
signal's amplitude


●● 60Hz Notch Filters
Answer: Avoid using it at all costs! Can cause ringing effect, latency
shifts, altered morphology


●● Sampling Rate
Answer: The rate (in points per second) that the A-D converter assigns
discrete points to an analog signal


●● Aliasing
Answer: The misinterpretation of an analog waveform due to sampling
too slowly