Physics Unit29: Molecules and Solids - 51fly国际课程 (51fly.win)

A diatomic quantum mechanical rotator in t.ug m,2 e;3+dxj ovzxshe L = 1 quantum state has energy E. The+ vo jsxe3;z,g m2dxu. same rotator in the L = 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 diatomic hajp,a9d ptv45-jo;tt/f7s sgf rmonic 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 vik(im b r amzre* j/+)l6l *sc2jp+:mkwbrator, the energy difference between adjacent quantum states +wz:kbp ae2rll)mm6j+sricj/* m*k(

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 mechanic +k62a jlml5t8caqv o0al rotator has a rotational +kl2c6j om5 t0aavlq8energy 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 mechanical vibra6mbd*1 vm+:vlvmx4( h jc9utu42 wiovtor in its ground state has energy E. This same vibrator in its third state has en 4mtcu1 h6:xwv*4u+im mdvjlb (9v 2voergy

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 causetz;g8 4m+e dh zl49 ynidfbotb*8g9u -d by

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 energy banhn5x wsq w(2uapp ja-( tzl s.9+tr/6wd 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 highest energy band conta bqqlvt1 56v(gining electrons, called the valence tlbvgv(5 q1 q6band, 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 isvyb- vmcbb 6xrwz21a/pv 1tt6j se+08 produced 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 p gakz sq0q7s:0roduced 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, a6sp w.y 4/97 ug:jsln vshpr;r hole is

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 a3 v-9a:fh.yvhra2fsv p-type semiconductor, 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 s6. qc7 4ygczwto a diode with the positive terminal to the p side and the negative terminal to the n side, gwycq74.c z6s then diode 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 sections consyqc.mw qh x0 3ix,d*.sisting ofh3. .q0w yxcmdqi,s x*

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 im rax1lls )3,zlddc+)f4vj6 moment 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 hac,q8 hdgb x/8ss $2.6 \times 10^{-5} \; eV$ 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 xj8/p elsib ,,$18 \times 10^{-5} \; eV$ 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 5 bx luk,7noj b:pd u)b0ny;6yeV) for a diatomic hydrogen molecule in the L = 2 quantum state. (The e dyx;j7bnyu:)n5 k,0bo blp6uquilibrium 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 vibrat 16mlm)psy kc-*(mesk ing in the v = 1 quantum state with a frequency of )yemk*km1cm -(lp6s s$2.0 \times 10^{13} \; Hz$. 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 tr : 05h,wm.ifj 2ith y:uq0ck8xolw1 mhe valence and conduction bands in a certain semiconductor is 1.25 eV. What is:k r c01 h8h2 wmxi:.qfjmuoi l,ywt05 the threshold wavelength for optical absorption in 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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