EP basics

Question 1

The flow of electric current is measured in what unit?

Answer 1

Amps

Question 2

What is the term used to denote the total opposition to flow of alternating current in a circuit?

Answer 2

Impedance or resistance (ohms)

Question 3

What is the most common DC electric power source?

Answer 3

Batteries. Defibrillators use batteries to charge a capacitor.

Question 4

Electric battery current has a frequency of what?

Answer 4

0 Hz.

DC current flows steadily from - to +. it does not alternate like AC does.

Question 5

The elimination of vibrations at certain frequencies is accomplished through the use of what electronic devices?

Answer 5

Filters

Question 6

When a DC defibrillator “charges” it stores electrical energy in what?

Answer 6

Capacitors

Question 7

What is the unit for energy?

Answer 7

Joule (J)

Question 8

How are EP lab defibrillators tested?

Answer 8

Discharging paddles into a dummy load

Question 9

What is the current drawn by a resistor of 100 ohms, if a 10 volt battery is applied across it?

Answer 9

0.1 amp

I=V/R