Description : Which one of the following particles travels at the speed of light? w) neutrons x) electrons y) photons z) muons
Last Answer : ANSWER: Y -- PHOTONS
Description : The dominant charge carriers in p-type semiconductors are: w) neutrons x) electrons y) protons z) holes
Last Answer : ANSWER: Z -- HOLES
Description : In N-type semiconductors the majority of the carriers are: w) holes x) electrons y) protons z) neutrons
Last Answer : ANSWER: X -- ELECTRONS
Description : Isotopes of an element have different numbers of: w) electrons x) protons y) neutrons z) leptons
Last Answer : ANSWER: Y -- NEUTRONS
Description : The difference between isotopes of an element is due to the presence of a different number of (a) Protons (b) Neutrons (c) Electrons (d) Photons
Last Answer : Ans:(b)
Description : The nuclei of heavy atoms generally contain: w) more electrons than neutrons x) more protons than electrons y) more neutrons than electrons z) more orbitals than electrons
Last Answer : ANSWER: Y -- MORE NEUTRONS THAN ELECTRONS
Description : The silver luster of the metals can be attributed to one of the following. It is attributed to their free w) protons x) ions y) neutrons z) electrons
Last Answer : ANSWER: Z -- ELECTRONS
Description : It is believed that carbon-14 in nature is slowly generated by the action of: w) protons on carbon-12 x) electrons on hydrogen y) cosmic rays on boron z) neutrons on nitrogen
Last Answer : ANSWER: Z -- NEUTRONS ON NITROGEN
Description : The binding energy of a nucleus is defined as one of the following. Is this definition: w) the energy equivalent to its mass x) the mass difference between its neutrons and protons y) the energy ... the difference between the mass of the nucleus and the sum of the masses of its protons and neutrons
Last Answer : ANSWER: Z -- THE DIFFERENCE BETWEEN THE MASS OF THE NUCLEUS AND THE UM
Description : The photomultiplier tube in the scintillation counter multiplies one of the following. Does it multiply: w) scintillations x) electrons y) ions z) photons
Description : A high voltage applied to a gas discharge tube containing neon gas at very low pressure causes a current to flow through the tube. Which one of the following are the particles that flow towards the ... Are they w) electrons x) protons y) negatively charged neon ions z) positively charged neon ions
Last Answer : ANSWER: Z -- POSITIVELY CHARGED NEON IONS
Description : The neutrons in an atom: w) are part of the nuclear charge x) rotate about the nucleus in elliptical orbits y) vary in number with different isotopes z) are always equal in number to the total number of protons
Last Answer : ANSWER: Y -- VARY IN NUMBER WITH DIFFERENT ISOTOPES
Description : In the N-type semiconductor the charge carries are a) Holes b) Neutrons c) Protons d) Electrons
Last Answer : d) Electrons
Description : In a P-type semiconductor the charge carriers are a) Electrons b) Holes c) Protons d) Neutrons
Last Answer : b) Holes
Description : A P-type semiconductor is doped to produce one of the following. Will it produce: w) both holes and electrons x) positive electrons y) negative electrons z) holes
Description : In the equation of a nuclear reaction, all but one of the following quantities are equal to each other on both sides of the equation. Which quantity is NOT conserved: w) the net electric charge x) the total mass-energy y) the number of protons z) the number of nucleons
Last Answer : ANSWER: Y -- THE NUMBER OF PROTONS
Description : A metal ball on an insulated stand is touched by a positively charged glass rod. What happens to the metal ball? Does it w) gain protons and lose electrons x) gain protons y) gain more protons than electrons z) lose electrons
Last Answer : ANSWER: Z -- LOSE ELECTRONS
Description : The energy associated with one photon of a light beam is proportional to one of the following. Is it proportional to: w) the intensity of the light source from which it came x) the number of photons in the beam y) the frequency of the photon z) the speed of the photon
Last Answer : ANSWER: Y -- THE FREQUENCY OF THE PHOTON
Description : The ENERGY associated with a photon depends upon the photon's: w) velocity x) frequency y) amplitude z) the brightness of the source from which it comes
Last Answer : ANSWER: X -- FREQUENCY
Description : Geiger-Muller counter is used to detect-----? A. Protons (Answer) B. Neutrons C. Photons D. none
Last Answer : A. Protons (Answer)
Description : In the fission of U235, what is the average number of neutrons produced in the fission reaction? w) 1.5 x) 2.5 y) 3.5 z) 4.5
Last Answer : ANSWER: X -- 2.5
Description : Which of the following supports particle nature of photons? (1) Diffraction (2) Polarization (3) Photoelectric effect (4) Interference
Last Answer : (3) Photoelectric effect
Description : Which of the following supports particle nature of photons ? (1) Diffraction (2) Polarization (3) Photoelectric effect (4) Interference
Last Answer : Photoelectric effect
Description : Photons and gravitons are names associated with a category of particles called: w) mesons x) bosons y) leptons z) baryons
Last Answer : ANSWER: X --BOSONS
Description : The index of refraction can be considered: w) a ratio of material thickness between substances x) a ratio of velocities of light in different materials y) a ratio of mass between materials z) to have the units of photons
Last Answer : ANSWER: X -- A RATIO OF VELOCITIES OF LIGHT OF DIFFERENT MATERIALS
Description : Neutrinos are a subset of which of the following categories? w) photons x) leptons y) mesons z) baryons
Last Answer : ANSWER: X -- LEPTONS
Description : The particle nature of light is demonstrated by which of the following? w) the photoelectric effect x) the various colors of light y) the speed of light z) diffraction.
Last Answer : ANSWER: W -- THE PHOTOELECTRIC EFFECT
Description : Albert Einstein received the Nobel prize in physics for his work on: w) gravitation x) relativity y) photoelectric effect z) Brownian motion
Last Answer : ANSWER: Y -- PHOTOELECTRIC EFFECT
Description : The photoelectric effect is a demonstration of: w) the wave nature of light x) the particle nature of light y) Compton scattering z) the continuous spectrum of radiation
Last Answer : ANSWER: X -- THE PARTICLE NATURE OF LIGHT
Description : Which of the following phenomena suggest that light may be a transverse wave? w) reflection x) polarization y) photoelectric effect z) diffraction
Last Answer : ANSWER: X -- POLARIZATION
Description : The wave nature of light is demonstrated by which of the following? w) the photoelectric effect x) color y) the speed of light z) diffraction
Last Answer : ANSWER: Z -- DIFFRACTION
Description : An atom contains 4 protons, 3 neutrons, and 5 electrons. What is its total electric charge?
Last Answer : -1 A+
Description : For an element , if atomic number (Z) and mass number (A) are 29 and 63 respectively . Then the number of protons , neutrons and electrons respectivel
Last Answer : For an element , if atomic number (Z) and mass number (A) are 29 and 63 respectively . Then the number of protons ... C. 29 , 34 ,29 D. 29 , 29 , 29
Description : In solid-state optical detectors, the excited charge is transported in the solid by ∙ a. Holes and protons ∙ b. Holes and electrons ∙ c. Anion and cation ∙ d. Protons and photons
Last Answer : ∙ b. Holes and electrons
Description : Ammonia can be considered a Lewis base because it can donate: w) electrons x) protons y) hydronium ions z) hydroxide ions
Last Answer : ANSWER: A -- ELECTRONS
Description : Magnetic fields are produced by: w) resistance x) an electric potential difference y) electric current z) stationary charge
Last Answer : ANSWER: Y -- CURRENT
Description : Good conductors have many loosely bound _____. (1) neutrons (2) protons (3) positron (4) electrons
Last Answer : (4) electrons Explanation: In a conductor, the outer electrons of the atoms are loosely bound and free to move through the material.
Description : Magnetism in materials is due to - (1) electrons at rest (2) circular motion of electrons (3) protons at rest (4) all neutrons at rest
Last Answer : (2) circular motion of electrons Explanation: Myopia is commonly known shortsighted. It is a condition of the eye where the light that comes in does not directly focus on the retina but in ... most commonly correct myopia through the use of corrective lenses, such as glasses or contact lenses.
Description : Particles involved in the movement within material are A. protons B. electrons C. neutrons D. positrons
Last Answer : electrons
Description : Magnetism in materials is due to (1) electrons at rest (2) circular motion of electrons (3) protons at rest (4) all neutrons at rest
Last Answer : circular motion of electrons
Description : In the United States, coal is the energy source that produces the highest percentage of our electricity. Second is: w) hydropower x) oil y) nuclear energy z) solar energy
Last Answer : ANSWER: Y -- NUCLEAR ENERGY
Description : The current through a metallic conductor is due to the motion of a. free electrons b. Protons c. Neutrons d. still under controversy
Last Answer : a. free electrons
Description : The magnitude of the quarks' electric charge is: w) zero. x) greater than the electron's charge. y) equal to the electron's charge. z) less than the electron's charge.
Last Answer : ANSWER: Z -- LESS THAN THE ELECTRON'S CHARGE.
Description : To develop the correct mathematical description of the distribution of radiated energy of a blackbody with respect to wavelength for a given temperature, Planck found it necessary to assume that the molecular ... units or quanta y) radiant energy in a continuous form z) none of the above.
Last Answer : ANSWER: X -- RADIANT ENERGY IN DISCRETE UNITS OR QUANTA
Description : The periodic table arranges elements by the number of ____ in their outermost energy levels. a. neutrons c. protons b. atoms d. electrons
Last Answer : d. electrons
Description : Electric current in a metal wire is due to the flow of — (1) Electrons (2) Protons (3) Ions (4) Holes
Last Answer : (1) Electrons Explanation: A solid conductive metal contains mobile, or free electrons, originating in the conduction electrons. When a metal wire is connected across the two terminals of a DC ... the conductor are forced to drift toward the positive terminal under the influence of this field.
Description : Electric current in a metal wire is due to the flow of— (1) Electrons (2) Protons (3) Ions (4) Holes
Last Answer : Electrons
Description : An inkjet printer uses in its operation: (a) Positrons (b) Neutrons (c) An electric charge (d) Photons
Last Answer : (c) An electric charge
Description : Liquid fuels can be used to generate electricity in a variety of ways. Which of the following technologies converts liquid fuel directly to electricity without a combustion step? w) turbine x) battery y) fuel cell z) Stirling engine
Last Answer : ANSWER: Y -- FUEL CELL
Description : A semiconductor device made up of a single p-n Junction is called a: w) transistor x) diode y) Fet z) integrated circuit
Last Answer : ANSWER: X -- DIODE