Question

10.A R. Leg driven circuit is meant to (a) minimize common mode noise, (b) amplify weak EKG signals, (c) invert the EKG signal (d) none of the above.

11.The averaging resistors in a R.Leg driven circuit , are called this because, (a) they are the geometric average of the upper and lower cutoff frequencies of the notch filter, (b) they average the EKG voltage signal. (c) they average the RA, and LA voltages.

12. What is the best capacitor to use in a defibrillator (a) Mica (b) Mylar, (c) Electrolytic (d) tantalum

13. Which of the following waveforms is not used in a defibrillator ( a) damped sinusoid, (b) MPTE, (c) overdamped, (d) critically damped.

14. If a defibrillator capacitor must hold 200 J of energy and be charged to 4 KV its value is (a) 25 mF, (b) 25 F, (c) 25 microfarad, (d) 22.5 mF

15. If this capacitor is discharged into a patient load of 100 ohms, How long does it take for the capacitor to be discharged to 50 J. (a) 2 ms, (b) 1.73 ms, (c) 2s (d) none of the above

Answer 1

10.

R. Leg driven circuit is meant to minimize common mode noise. It is added to biological signal amplifiers like ECG EEG or EMG circuits to reduce common mode interference.