EP3 Midterm quiz 2024

From which plane do the Einthoven leads provide information?

• frontal

• horizontal

• saggital

• neither of them

How can we count the platelets with a Coulter-counter?

• in integral discriminator mode after hemolysis

• in integral discriminator mode without hemolysis

• in differential discriminator mode after hemolysis

• in differential discriminator mode without hemolysis

What type of resistor does the skin behave as in the case of high-frequency alternating current?

• capacitive resistance

• ohmic resistance

• both of them simultaneously

• neither of them

Which absorption subprocess can be utilized to determine the photon-energy of gamma photons?

• pair production

• Compton-scattering

• photoeffect

• elastic scattering

What kind of spectrum does the bremsstrahlung (braking radiation) has?

• line spectrum

• band spectrum

• continuous spectrum

• it depends on the situation

What kind of lens can be applied to restore acuity in the case of myopia?

• concave

• concex

• bifocal

• multifocal

If the transmittance is 10% the absorbance is...

• 0.01

• 0.1

• 1

• 10

What parameter is the natural frequency (eigenfrequency) independent of?

• spring constant

• mass

• amplitude

Sievert (Sv) is the unit of... (2 correct answers)

• exposure

• dose equivalent

• absorbed dose

• effective dose equivalent

What does it mean if the refractive index of our sample (let's call it X) is 1.41?

• It's optically less dense than air.

• Light travels more slowly in it than in a vacuum.

• There's no refraction on the boundary surface of X and water.