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Physics test
Interactive Tests in Medical Physics
Anthropometry (Laboratory practical)
1/1. The range of normal BMI values is:
18.5-24.99
<16
>40
9.5-13.99
32-43.99
Clench force (Laboratory practical)
2/1. When measuring clench force with a manual dynamometer and exerting maximum clench force for a given time period, ...
we do work in the biological sense but not in the physical sense.
we do work in the physical sense but not in the biological sense.
we do work both in the physical sense and in the biological sense.
we do not do work either in the physical sense or in the biological sense.
it depends on the magnitude of the clench force whether we do physical work or not.
Electromyography (Laboratory practical)
3/1. What is the order of magnitude and unit of EMG activity?
0,01–1 mV
10–50 kPa
3–5 Nm
10–20 μm
100–500 kV
Acoustics (Laboratory practical)
4/1. The sound "A" on a trumpet and a clarinet have the same pitch, but the two are clearly distinguishable. Which property is most important in enabling one to distinguish between these two instruments?
harmonic content
intensity
fundamental frequency
displacement amplitude
pressure amplitude
Blood pressure measurement (Laboratory practical)
5/1. A wrist blood pressure meter shows 120/80 mmHg at the level (height) of the heart. About what value will it show if we lower our wrist by 40 cm?
150/110 mmHg
150/50 mmHg
90/50 mmHg
125/85 mmHg
115/75 mmHg
SI: SI units and prefixes.
6/1. If the density of the air is 1.29 g/litre, how much is it in SI units?
1,29·10^-6 kg/m3
1,29·10^-2 kg/m3
1,29 kg/m3
1,29·10^2 kg/m3
Calculation 1
7/1. A 6-kg object moves towards east. A constant force of 12 N is exerted on it pointed to west. The direction and magnitude of the acceleration is:
2 m/s^2, east
2 m/s^2, west
6 m/s^2, east
18 m/s^2, east
18 m/s^2, west
Calculation 2
8/1. There are two ohmic resistances of 2 Ω. What is the ratio of the resulting resistances if they are connected serial, then paralel?
4:1_
9:2_
3:1_
6:3_
2:3_
Motion
9/1. If we throw a ball in the air (vertical projectile motion), its acceleration is:
downward during both the ascent and the descent part of the motion
downward during the ascent part of the motion and upward during the descent part
upward during the ascent part of the motion and downward during the descent part
upward during both the ascent and the descent part of the motion
downward at all times except at the very top, when it is zero
Force, work, power
10/1. Which object has the highest kinetic energy?
mass of 3m, velocity of v
mass of 3m, velocity of 2v
mass of 2m, velocity of 3v
mass of m, velocity of 4v
all of them has the same kinetic energy
Vibrations
11/1. During damped oscillation, the amplitude decreases in time...
in an inverse cubic fashion.
in an inverse quadratic fashion.
in an exponential fashion.
in a quadratic fashion.
in a cubic fashion.
Optics
12/1. Which of the following statements is CORRECT?
Temperature
13/1. Which statement is CORRECT?
Blackbody radiation is emitted at special wavelengths, i.e. it has a discrete spectrum
The higher the temperature of a blackbody, the longer the wavelength of maximum emission.
The blackbody doesn't absorb the electromagnetic radiation.
The higher the temperature of a blackbody, the shorter the wavelength of maximum emission.
The blackbody is a model for high reflection surfaces.
Flow
14/1. Critical velocity is proportional to the...
density of the liquid .
viscosity of the liquid.
radius of the tube.
length of the tube.
width of the wall of the tube.
Diffusion
15/1. Which one of the following statements is CORRECT?
The larger the mass of a particle is, the smaller is the rate of the diffusion.
At lower temperature the diffusion coefficient is higher.
The diffusion coefficient is independent of the radius of the particle.
The rate of the diffusion is higher if the viscosity of the solution is higher.
The rate of the diffusion is independent of the viscosity of the solution.
Thermodynamics
16/1. Which one of the following statements is CORRECT for the entropy?
The increase in the thermodynamic probability means the increase in the entropy.
The increase in the thermodynamic probability means the decrease in the entropy.
The decrease in the thermodynamic probability means the increase in the entropy.
Its unit is W/K.
There is no connection between the thermodynamic probability and the entropy.
Bioelectricity
17/1. What defines the electric field vector?
The force acting on a unit positive test charge.
The force acting on a unit negative test charge.
The work done on a unit positive test charge when moved to infinity.
The work done on a unit negative test charge when moved to infinity.
The work done by a unit positive test charge when moved to infinity.
Electricity and magnetism
18/1. The direction of the force on a current-carrying wire placed in a magnetic field depends on...
only the direction of the current.
only the direction of the field.
the direction of current as well as field.
only the strenght of the field.
only the strenght of the current.
Signal processing
19/1. What is the sampling rate required for the proper reconstruction of a signal from its sample sequence?
at least twice in a period
at least four times in a period
the frequency of the fastest signal component
at least twice the frequency of the fastest signal component
the frequency of the slowest signal component
Waves
20/1. Which one of the following statements is CORRECT?
In longitudinal waves, the particles in the medium oscillate perpendicular to the direction of the propagation.
In transverse waves, the particles in the medium oscillate parallel to the direction of the propagation.
Wave is a disturbance that moves through a medium carrying energy and matter.
Doppler frequency shift depends on the relative velocity of the observer and the source.
When the receiver is moving away from a source of waves, the observed frequency is larger than the actual frequency.
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