Fall-2013-Sci-25-Exam-II (1)

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Dec 6, 2023

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Science 25 Fall 2013 Prof. Mancini _____________________________ NAME EXAM I _____1. According to ____________’s Law, current and potential difference are inversely proportional. a) Newton b) Coulomb c) Claussius d) Ohm e) mancini _____2. ______________ are nearly 2000 times heavier than _____________. a) protons, neutrons b) neutrons, alpha particles c) electrons, protons d) protons, electrons e) neutrons, photons _____3. An example of a positive electric monopole is a(n) a) neutron b) proton c) electron d) gamma e) neutrino _____4. An accelerating electric charge produces a) only an electric field b) only a magnetic field c) a neutral field d) both an electric and magnetic field e) a field proportional to the inertia of the particle _____5. The electric energy lost when a current passes through a resistance a) becomes gamma radiation b) becomes magnetic energy c) becomes electric energy d) disappears completely e) becomes heat energy _____6. All magnetic fields originate in a) permanent magnets b) electromagnets c) iron atoms d) all metallic atoms e) moving electric charges _____7. Twenty milliamps pass through a 50 kilo-ohm resistor. What is the potential difference? a) 1 V b) 10 V c) 100 V d) 1 kV e) 1 MV _____8. Twelve 6  resistors are connected in parallel. What is the equivalent resistance? a) 72  b) 2  c) 0.5  d) 24  e) none of these

_____9. Twenty identical resistors R are connected in parallel and have an equivalent resistance of 0.5  . What is the value of R? a) 0.5  b) 5  c) 50  d0 20  e) 10  _____10. What happens to the electric force between two charges if each charge is doubled while the separation is also doubled? a) increase 4x b) increase 16x c) decrease 4x d) decrease 16x e) no change _____11. A water wave travels at a speed of 6 m/s with a wavelength of 2 m. What is the frequency of this wave? a) 12 Hz b) 3 Hz c) 0.6 Hz d) 24 Hz e) none of these _____12. ___________ waves cannot travel through the vacuum of outer space. a) sound b) x-rays c) radio d) UV e) gamma _____13. Which of the following waves can be polarized? a) gamma b) x-rays c) UV d) visible e) all of these _____14. Sixteen 2  resistors are connected in series. What is the equivalent resistance? a) 32  b) 1/8  c) 1/32  d) 18  e) none of these _____15. In a junkyard there is great use for a(n) a) superconductor b) magnetic monopole c) Tesla coil d) electromagnet e) permanent magnet _____16. Ions in the body are called a) minerals b) electrolytes c) vitamins d) hemoglobin e) bile _____17. A transformer can change a) the voltage of an alternating current b) the power of an alternating current c) alternating current to direct current d) direct current to alternating current e) all of these

_____18. White light is _____________ into its separate colors when it is refracted in a glass prism. a) reflected b) diffracted c) enhanced d) dispersed e) resonated _____19. An object is placed 20 cm from a converging lens whose focal length is 4 cm. Where is the image formed? a) 2 cm b) 4 cm c) 8 cm d) 16 cm e) none of these _____20. When a wave bends around an obstacle it is called a) diffraction b) refraction c) reflection d) dispersion e) distraction _____21. All EM radiation has the same a) amplitude b) speed c) frequency d) wavelength e) period _____22. Which color light has the greatest wavelength? a) radio b) microwave c) UV d) visible e) infrared _____23. Which of the following has the greatest energy? a) red b) orange c) yellow d) green e) indigo _____24. A 10 MW device is connected to a 1 kV outlet. Hat is the current through this device? a) 10 A b) 10 mA c) 10 kA d) 10 -4 A e) 0.1 A _____25. All atoms are a) ionically charged b) magnetic c) electrically neutral d) radioactive e) have the same visible spectrum _____26. Light is polarizable because it is a) magnetically charged b) electrically charged c) a transverse wave d) a longitudinal wave e) both (a) & (b) are correct _____27. A positron is the anti-matter particle of the a) proton b) positive beta particle c) electron d) photon e) neutron

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