1) current whose magnitude and polarity are constantly changing a) alternating current b) Irms c) Ipeak d) direct current 2) current whose polarity remains constant a) direct current b) Irms c) Ipeak d) alternating current 3) the ratio sinθ1/sinθ2 where θ1 is in a vacuum, and θ2 is in the medium a) refraction b) absolute refractive index c) diffraction d) critical angle 4) the number of protons in an atomic nucleus a) mass number b) nuclide c) 3.14 d) atomic number 5) Doppler-shifting of a light wave towards the shorter wavelength end of the spectrum a) redshift b) blueshift c) greenshift d) purpleshift 6) Doppler-shifting of a light wave towards the shorter wavelength end of the spectrum a) orangeshift b) redshift c) blueshift d) yellowshift 7) the ratio of electric charge to potential difference between any two conductors separated by an insulating material a) charge b) irradiance c) capacitance d) current 8) waves that have the same frequency, speed and have a constant phase relationship a) path difference b) constructive interference c) destructive interference d) coherent waves 9) two vectors which act at right angles, the vector sum of which is the original vector a) complementary vectors b) resultant c) sine slides down slope d) components of a vector 10) when two or more objects interact, the total momentum is conserved, in the absence of external forces a) conservation of momentum b) elastic collision c) inelastic collision d) explosion 11) the maximum value of the angle between the normal and the ray in glass, θglass, for which refraction can occur a) angle of incidence b) critical angle c) normal d) angle of reflection 12) theoretical form of energy accounting for most of the energy in the universe and causing its expansion to accelerate a) kkinetic energy b) dark matter c) dark energy d) Hubble's constant 13) type of matter which does not interact with electromagnetic radiation so is invisible to astronomers a) dark energy b) kinetic energy c) Hubble's constant d) dark matter 14) area surrounding the p-n junction of a diode where the electrons have combined with the holes leaving no free charges a) p-type semiconductor b) n-type semiconductor c) photodiode d) depletion layer 15) effect that causes waves to bend as they go past the end of an obstacle or through a small gap in a barrier a) refraction b) diffraction c) bendiness d) squeeze effect 16) a specified distance from a fixed point, in a specified direction. A vector quantity a) distance b) displacement c) velocity d) vector 17) observed change in frequency of a wave caused by relative motion between the source and observer a) Hubble's constant b) nee-naw, nee-naw c) Doppler effect d) time period 18) collision in which both momentum and kinetic energy are conserved a) elastic collision b) inelastic collision c) explosion d) impulse 19) flow of charged particles in a circuit a) current b) capacitance c) resistance d) solar wind 20) electrical potential energy that is given to each unit of charge that passes through the source a) alternating current b) t.p.d. c) electromotive force d) resistance 21) any atomic energy level higher than the ground state a) excited state b) atomic number c) fission d) fusion 22) splitting of a large atomic nucleus into smaller fragments, with the resultant release of excess energy a) fusion b) E=mc2 c) fission d) lost mass 23) diode connected in a circuit such that the p-type terminal is more positive than the n-type terminal a) reverse biased b) forward biased c) photodiode d) LDR 24) number of complete cycles of a wave passing a given point in a given time a) 3.14 b) frequency c) period d) amplitude 25) the force acting per unit mass placed at a point in the field a) weight b) newton c) gravitational field strength d) gravitational constant 26) the change of momentum of an object a) impulse b) slowing c) acceleration d) elastic collision 27) the deliberate splitting of a large nucleus caused by the collision of the nucleus with a neutron a) reduced fusion b) induced fission c) controlled explosion d) atomic theory 28) collision in which momentum is conserved but kinetic energy is not a) inelastic collision b) elastic collision c) explosion d) impulse 29) opposition to current in a source of electrical energy a) capacitance b) Wheatstone bridge c) internal resistance d) rebellion 30) power per unit area of radiation incident on a surface a) induction b) intensity c) irradiance d) insecurity 31) different forms of the same element containing the same number of protons but different numbers of neutrons a) isobars b) isotopes c) isohels d) isocreams 32) a spectrum that consists of narrow dark lines across an otherwise continuous spectrum a) rainbow b) line emission spectrum c) line absorption spectrum d) diffraction grating 33) a spectrum consisting of narrow lines of light, the position of which depend on the substances producing the light a) line emission spectrum b) line absorption spectrum c) Fraunhofer lines d) diffraction spectrum 34) the potential difference that is used to drive a current through the internal resistance of a source a) capacitance b) t.p.d. c) lost volts d) resistance 35) the total number of nucleons in the nucleus of an atom a) atomic number b) protons c) neutrons d) mass number 36) the product of the mass of an object and its velocity a) pomentum b) E=mc2 c) impulse d) momentum 37) the force that, when applied to an object of mass 1 kg, will cause the object to accelerate at a rate of 1 ms-2 in the direction of the applied force a) weight b) coulomb c) newton d) momentum 38) semiconductor material that has an excess of free electrons a) thermocouple b) P-type semiconductor c) N-type semiconductor d) negativium 39) a line drawn at right angles to a surface or the boundary between two different media a) critical angle b) normal c) incident ray d) total internal reflection 40) the current in a conductor at constant temperature is directly proportional to the potential difference across it a) potential difference b) capactiatnce c) Ohm's Law d) Irms 41) a circuit in which the current is zero. In the circuit there is a gap or an infinite resistance a) open circuit b) short circuit c) Wheatstone bridge d) parallel circuit 42) the difference in path lengths of two sets of waves a) wavelength b) displacement c) phase shift d) path difference 43) the time to make one complete wave a) frequency b) amplitude c) wavelength d) period 44) a type of p-n junction diode that responds to light intensity a) photograph b) photoresistor c) photofinish d) photodiode 45) the emission of electrons from a metal due to the effect of electromagnetic radiation a) dark matter b) photodiode c) resistance d) photoelectric effect 46) the emission of electrons from a material caused by light shining on it a) dark energy b) point source c) photoemission d) irradiance 47) the mode of operation of a photodiode where it can supply power to a load. This is the basis of a solar cell. a) battery b) photovoltaic mode c) p-n junction diode d) irradiance 48) a source of radiation with equal irradiance in all directions regarded as so small within its frame of reference as being equivalent to as single point a) LASER b) Sun c) coherent source d) point source 49) a measure of the work done in moving one coulomb of charge between the two points a) capacitance b) inductance c) joules d) potential difference 50) a circuit consisting of a number of resistors (often only two) in series, connected across a supply, that is used as a source of fixed or of variable p.d a) short circuit b) open circuit c) parallel d) potential divider 51) an object that is flying through the air under the influence of gravity a) penguin b) projectile c) trajectory d) parabola 52) semiconductor material that has an excess of free holes a) P-type semiconductor b) N-type semiconductor c) junction diode d) gruyere 53) the ratio of potential difference across the conductor to the current through it a) terminal potential difference b) capacitance c) resistance d) power 54) when a wave goes from one medium into another - its speed and wavelength always change; its frequency never changes; its direction sometimes changes a) refraction b) diffraction c) bending d) defraction 55) a diode connected in a circuit such that the p-type terminal is more negative than the n-type terminal a) forward biased b) reverse biased c) P-type semiconductor d) depletion layer 56) a physical quantity which has magnitude but no direction a) scalar b) vector c) momentum d) component 57) a circuit in which the current is at its maximum. In this type of circuit the resistance connected across the terminals of the source is 0 Ω a) open circuit b) series circuit c) capacitive circuit d) short circuit 58) the potential difference that appears across the terminals of a source when the source is supplying a current to a circuit a) lost volts b) electromotive force c) terminal potential difference d) internal resistance 59) the minimum frequency of electromagnetic radiation that will cause photoemission for a particular substance a) threshold frequency b) work function c) photoelectric effect d) photon energy 60) a physical quantity which has direction as well as magnitude a) scalar b) vector c) left d) speed 61) the rate of change of displacement a) acceleration b) distance c) speed d) velocity 62) the gravitational force acting on a mass a) mass force b) gravitational constant c) weight d) newtons per kilogram 63) the minimum energy required to cause photoemission from a particular substance a) threshold frequency b) kinetic energy c) irradiance d) work function 64) the rate of change of velocity a) displacement b) acceleration c) speed d) momentum

H Physics glossary - definitions quiz

طباعة
تضمين

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

استعادة الحفظ التلقائي: ؟