Question

1.Heat is (a) equal to temperature, (b) the temperature change divided by the mass, (c) the mass divided by specific heat, (d) the flow of energy due to a temperature difference.

2.The human temperature sense is associated with (a) sight, (b) smell, (c) touch, (d) hearing.

3.Temperature is a relative measure of (a) transferred energy, (b) hotness or coldness,                     (c) internal energy, (d) specific heat.

4.The temperature difference between the ice and steam points of water is (a) 1800C, (b)100K, (c) 1000F, (d) 180K.

5.Absolute zero is (a) 273 K, (b) 2120F, (c) -373K, (d) -2730C.

6.The SI unit of heat energy is (a) BTU, (b) calorie, (c) kilocalorie, (d) joule.

7.Heating in a vacuum can take place by (a) conduction, (b) convection, (c) radiation,                     (d) sublimation.

8. The energy involved in a phase change is called (a) thermal energy, (b) latent heat,              (c) radiant energy, (d) specific heat.

9. Which of the following is not a method of heat transfer? (a) conduction, (b) sublimation,          (c) radiation, (d) convection.

10.Transfer of heat through air is primarily by (a) induction, (b) radiation, (c) convection,              (d) conduction.

11.Electric charge is measured in units of (a) volts, (b) coulombs, (c) newtons, (d) watts.

12.An object can be charged by (a) friction, (b) contact, (c) induction, (d) all of these.

13.The conservation of charge states that the net charge of an isolated system is (a) zero,        (b) less than zero, (c) constant, (d) greater than zero.

14.The force between like charges is (a) attractive, (b) repulsive, (c) repulsive to one charge and attractive to the other, (d) greater than zero.

15.A material in which electrons are free to move is called (a) oscillator, (b) semiconductor,          (c) insulator, (d) conductor.

16.The electric potential is (a) force per charge, (b) voltage per charge, (c) energy per charge,         (d) charge per voltage.

17.The electric force per charge is (a) electric potential, (b) electric energy, (c) electric field,        (d) voltage.

18.The force between unlike charges is (a) less than zero, (b) repulsive, (c) attractive to one charge and repulsive to the other, (d) attractive.  

19.The electrostatic force (a) has the unit of volt, (b) is only attractive, (c) does not depend on the signs of the charges, (d) increases when the charge separation is decreased.

20.The magnitude of the electric field is measured in units of (a) coulombs, (b) newtons,        (c) volts, (d) newtons/coulomb.

21.Electric current is measured in units of (a) volts, (b) coulombs, (c) amperes, (d) ohms.

22.A flow of charge in a conductor requires (a) resistance, (b) a net charge, (c) a metal conductor,        (d) an energy per charge difference.

23.Electric current is (a) the same as potential, (b) the same as resistance, (c) the same as power,         (d) the flow of charge through the circuit.

24.A battery is a device that converts (a) electrical energy into mechanical energy, (b) chemical energy into mechanical energy, (c) chemical energy into electrical energy (d) none of these.

25.The opposition of material to electric current flow is called (a) voltage, (b) reactance, (c) friction,       (d) resistance.

26.Electric power is equal to the (a) current times the voltage, (b) current squared times the resistance, (c) voltage squared divided by the resistance, (d) all of these.

27.Electric power is measured in units of (a) joules, (b) joules per second, (c) joules times seconds,       (d) none of these.

28.What is the same for each component in a series electrical circuit? (a) power, (b) current,              (c) voltage, (d) resistance.

29. What is the same for each component in a parallel electrical circuit? (a) resistance (b) power,          (c) current, (d) voltage.  

30.In a series electrical circuit the total resistance is the (a) product, (b) square, (c) sum, (d) reciprocal         of the individual resistances.  

31.The number of oscillations per time is given by the (a) wave speed, (b) wavelength,     (c) frequency, (d) nodes.

32.Points of maximum amplitude in a standing wave are (a) out of phase, (b) overtones,    (c) antinodes, (d) pitch.

33.If an oscillation has a frequency of 1 Hz, it has a period of (a) 2seconds, (b) 1second, (c) 1/2seconds, (d) 10seconds.

34.The propagation of energy through a medium or space from a disturbance is a         (a) wave, (b) vibration, (c) oscillation, (d) translational motion.

35.The oscillations are parallel to the wave motion in (a) water waves, (b) light waves,    (c) sound waves, (d) resonant strings.

36.Points of zero amplitude on a string or rope where standing waves are present are called (a) crests, (b) antinodes, (c) period, (d) nodes.

37.The bending of sound waves is called (a) resonance, (b) reflection, (c) refraction,       (d) interference.

38.Sonar range detecting is based on (a) refraction, (b) reflection, (c) resonance,            (d) interference.  

39.The maximum distance of an oscillation from the center, or equilibrium, position is called (a) wavelength, (b) period, (c) amplitude, (d) frequency.

40.In SI system one hertz (Hz) is the unit of the (a) wavelength, (b) speed of sound,  (c) period, (d) frequency.  

41.Ray optics is a convenient way to represent (a) interference, (b) diffraction,

(c) reflection, (d) polarization.

42.The “beam” of a flashlight is seen as a result of (a) diffuse reflection, (b)refraction,   (c) dispersion, (d) internal reflection.

43.Being able to “see hot air” rising from a hot surface is due to (a) dispersion, (b)diffuse reflection, (c) refraction, (d) internal reflection.

44.The critical angle for a water air interface is about 480. Light will be transmitted from the water for an angle of incidence of (a) 600, (b) 520, (c) 480, (d) 440.

45.A reverse in the direction of a wave due to a boundary is called (a) refraction,        (b) interference, (c) reflection, (d) polarization.

46.A change in the direction of a wave due to a change in its velocity is called            (a) refraction, (b) interference, (c) reflection, (d) polarization.

47.The separation of sunlight into component colors by means of a prism is called          (a) diffraction, (b) dispersion, (c) refraction, (d) reflection.

48.Fiber optics is based on (a) diffuse reflection, (b) dispersion, (c) polarization,          (d) total internal reflection.

49.Monochromatic light transmitted into a prism cannot be (a) refracted,                 

(b) reflected by1800, (c) internally reflected, (d) dispersed.  

     

50.Which of the following colors of light is refracted more in a typical transparent medium? (a) blue, (b) yellow, (c) green, (d) red.   

Answer 1

Comment the correct option is written with explanation