Medical Physics exam questions and answers Rated A+

When you set the knob of your radio to 89.2 (Radio SWH Rock) FM, that means that you - ANSWER-set the resonant frequency of the receiver circuit to 89.2 MHz The light is - ANSWER-transverse wave 91.8 mhz FM is how many waves cycle? - ANSWER-91.8 million The unit "Angstrom" most often is used to describe: - ANSWER-size of atoms and molecules. Another name for the unit of the consumed electric energy is the: - ANSWER-Kilowatt hour. The cause of Bremsschthralung (breaking) x-ray is: - ANSWER-energy release when electron changes direction and loses speed caused by nucleous electromagnetic attraction force. The principle of the laser can be described with: - ANSWER-light amplification by stimulated emission radiation. Piezoelectricity means: - ANSWER-electricity resulting from pressure. The gradual decrease in the x-ray beam intensity as it passes through the material is called: - ANSWER-attenuation There is an intrinsic magnetic moment of the proton. Its small magnitude is one of reasons leading scientists to know that the proton is not an elementary particle but it consists of something we call quarks. But this intrinsic magnetic moment gives a proton some particular property. Which is it? - ANSWER-polarity Electrical current is: - ANSWER-a flow of charges Which statement is wrong? - ANSWER-electrons consist of two quarks where one quark is having negative charge -1 and other quark has charge equal to 0. In particle physics they are called leptons and when a quark undergoes annihilation, electron becomes a positron. Point A is at lower electrical potential than point B. An electron between them on the line joining them - ANSWER-will move towards B. The energy is: - ANSWER-possibility to perform a work equivalent to the mass characterizes a physical condition. ALL ANSWERS ARE TRUE. Which particle is responsible for a material's magnetic properties? - ANSWER-electron The covalent bond - ANSWER-is a condition when electronegative comparable substances share electrons. Which statement is false? - ANSWER-two resistor resistances cannot be added together. Cohesion is: - ANSWER-intermolecular forces between same type of molecules. The Achilles tendon is attached to the back of the foot as shown in the image. If a human rises to the one point of the tarsal, then what kind of lever is it? - ANSWER-lever for force. Which is true? - ANSWER-viscosity is a resistance that a fluid offers to flow when subject to a shear stress. As attraction between particles increases, viscosity increases. In an ideal liquid there would be no viscosity. All answers are correct. In damped oscillations: - ANSWER-frictional force decreases the oscillations. Sound waves do not travel through - ANSWER-vacuum The flow becomes more turbulent if: - ANSWER-the speed of flow increases. the viscosity of liquid decreases. both answers are correct. The fundamental force which is responsible for chemical bonds between atoms is: - ANSWER-electromagnetic force. Alpha particle gains 20 keV energy at 10 kV potential difference. It happens because alpha particle has - ANSWER-two protons The Bohr atom model assumes that energy is emitted, when: - ANSWER-electron moves from a higher energy to a lower one.