Question

One large box on the ECG paper indicates:

A) 0.20 seconds
B) 0.04 seconds
C) 2 seconds
D) 4 seconds

Answer 1

One large box on an ECG paper indicates 0.20 seconds. The ECG question also relates to the RC time constant, which must be less than 100 μs for an ECG monitor to accurately read voltage changes; the maximum capacitance can then be determined based on a given resistance.

Step-by-step explanation:

The duration represented by one large box on an ECG paper. On standard ECG graph paper, each small square represents 0.04 seconds, and each large square is made up of five small squares. Therefore, one large box represents 0.20 seconds. To relate this to ECG measurements and the electrical properties of the heart monitoring equipment, it is important to understand the concept of the RC time constant in the context of an ECG monitor. The RC time constant determines the ability to measure voltage changes over short periods. If the resistance is given as 1.00 kΩ, and the required RC constant is less than 100 μs (1.00 x 10² μs), using the formula RC = R × C, the maximum capacitance can be calculated. Finally, whether limiting this capacitance in practice is challenging would depend on the specifics of the ECG monitor design and manufacturing constraints.