Physics Unit29: Molecules and Solids - 无忧得胜-网上国际课程 (5edu.win)

For a diatomic quantum mechaniczu:zh nx5.etlfid)jst ,l/-1 (q my;pal rotator, the energy difference between adjacent qf ptd-z ,e/5)j.tz msn1l(y: i lhu;xenergy levels

A. increases as L increases.

B. decreases as L increases.

C. is constant for all L.

D. varies randomly as L increases.

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic quantum mechanical rotator in the L 6jjqif;pcj-f4ok x7*d0j0wl = 1 quantum state has energy E. The same rotator in the L fojpj 67xj-;f jk qc0i *w40ld= 2 quantum state will have energy

A. 2E.

B. 3E.

C. 6E.

D. none of the given answers

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

In its lowest quantum state, the energy of a dia/:s nxvi0 t9e ggvn0vp;/ ftw,tomic harmonic oscillator is

A. (1/4)hf.

B. (1/2)hf.

C. hf.

D. (3/2)hf.

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

For a diatomic quantum mechanical vibrator, the energy diff eh.vfi e7n(z jie;u7 7ncm9y7erence between adjacent9yin7(c 7m;e7j h7i.vz euefn quantum states

A. increases as v increases.

B. decreases as v increases.

C. is constant for all values of v.

D. varies randomly as v increases.

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In its lowest quantum state, a diatomic quantum mechanical rotator haxdn+g -uf3iq x+i- g8u:gadm 2s a rotational eui+8-da gig: -3qgfdux +xm 2nnergy of

A. zero.

B. $h/2 \pi I$.

C. $h/\pi I$.

D. none of the given answers

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic quantum m) 47mzt0pfdrt1 fyp/l echanical vibrator in its ground state has energy E. This same vibrpt/f0 4l)zf7 rdmpty1ator in its third state has energy

A. E.

B. 3E.

C. 5E.

D. 7E.

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Metallic bonding is caused b: wdv9pe)4p hha7 w0cby

A. the sharing of electrons by all atoms.

B. the transfer of electrons between atoms.

C. unequal charge distributions around neutral molecules.

D. atoms bonding to hydrogen molecules.

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In a good conductor, the highest ioan:s,v( 1x d j-sp3ptef.2nenergy band containing electrons is

A. only partially filled.

B. completely filled.

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15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In a good insulator, the h2ra;1oxpj-0v+qd h1* bzz g ll;)oc tu,h3fnhighest energy band containing electrons, called the valence banda ,c ug3+q1jh;l)*oo pv-dnb1rhhxz; f0lt 2z, is

A. only partially filled.

B. completely filled.

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16#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An n-type semiconductor is prodyyi, (: m:00lt kwpqqnuced by

A. doping the host crystal with donor impurities.

B. doping the host crystal with accepter impurities.

C. pure crystals of germanium.

D. none of the given answers

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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A p-type semiconductor is produced/sjyn - 7bbev+e)hg0 x by

A. doping the host crystal with donor impurities.

B. doping the host crystal with accepter impurities.

C. pure crystals of germanium.

D. none of the given answers

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18#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In a p-type semiconductor, a hole iob. p3sje2jinlvkm ic -rlc l5wi7-)-6g v39os

A. a donor atom.

B. an extra electron supplied by a donor atom.

C. a missing atom in the crystalline structure.

D. a region where an electron is missing.

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19#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When a voltage is applied across a p-type semiconductfc .ur1(tmkbp*t 5 t;for, the holes

A. are destroyed.

B. move toward the positive electrode.

C. move toward the negative electrode.

D. do not move.

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20#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If a battery is connected to a diode with the positive terminal to the p sideej1 eabdtnpb419+ k4h and the negative terminal to the n side, then diode p91hbb k1 ne4jat+de4 is said to be

A. forward biased.

B. reversed biased.

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21#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A simple junction transistor consists of three semiconductor g76 hjr,0w; gtmj)czosections consisting ogrh, w)7o0j;tj 6gc zmf

A. pnp semiconductors.

B. npn semiconductors.

C. either pnp or npn semiconductors.

D. none of the given answers

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22#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic quantum mechanical oscillator has a momen / tpqg,b+4cmzt of inertia of $7.73 \times 10^{-45} \; kg \cdot m^{2}$. What is the rotational energy in the quantum state characterized by L = 2?

A. $2.27 \times 10^{-5} \; eV$

B. $2.72 \times 10^{-5} \; eV$

C. $7.22 \times 10^{-5} \; eV$

D. $8.71 \times 10^{-5} \; eV$

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23#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic molecule :10dd sdjfg0agu g by- h22q9ahas $2.6 \times 10^{-5} \; eV$ of rotational energy in the L = 2 quantum state. What is the rotational energy in the L = 1 quantum state?

A. $3.4 \times 10^{-6} \; eV$

B. $5.3 \times 10^{-6} \; eV$

C. $7.8 \times 10^{-6} \; eV$

D. $8.7 \times 10^{-6} \; eV$

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24#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic molecule has /ct tdkg3 4viaz.hb/vp/7 jj 9$18 \times 10^{-5} \; eV$ of rotational energy in the L = 2 quantum state. What is the rotational energy in the L = 0 quantum state?

A. $9.0 \times 10^{-5} \; eV$

B. $6.0 \times 10^{-5} \; eV$

C. $3.0 \times 10^{-5} \; eV$

D. $0 \; eV$

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25#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Estimate the rotational energy (in eV) forg 03qo rzvprgy4q4y(8 r7lud4 a diatomic hydrogen molecule in the L = 2 40 l qugo y3yrqzgr47(prd 4v8quantum state. (The equilibrium separation for the H2 molecule is 0.075 nm.)

A. $0.011 \; eV$

B. $0.022 \; eV$

C. $0.033 \; eV$

D. $0.044 \; eV$

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26#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic molecule is vibrating 83 jl +60-fqi gn3b6)r rtovrnz8wcn oin the v = 1 quantum state with a frequency of jqrw3 g 68nb)r+l60o3i-vrcnn8t o fz$2.0 \times 10^{13} \; Hz$. What is the energy of vibration?

A. $0.041 \; eV$

B. $0.083 \; eV$

C. $0.12 \; eV$

D. $0.17 \; eV$

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27#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The energy gap between the valence and conducti /pdt,uob.e8 jon bands in a certain semiconductor is 1.25 eV. What is the threshold wavelength for optical absorption in dj ptu8oe.b ,/this substance?

A. $599 \; nm$

B. $959 \; nm$

C. $873 \; nm$

D. $995 \; nm$

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总分:27分及格:16.2分时间:不限时

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