1. Which of the following statements for electric field lines are true? (Give ALL correct answers, i.e., B, AC, BCD…) A) E-field lines point inward toward negative charges. B) E-field lines may cross. C) E-field lines do not begin or end in a charge-free region (except at infinity). D) Where the E-field lines are dense the E-field must be weak. E) E-field lines make circles around positive charges. F) A point charge q, released from rest will initially move along an E-field line. G) E-field lines point outward from positive charges. 2. Consider two uniformly charged parallel plates as shown above. The magnitudes of the charges are equal. (For each statement select T True, F False). A) If the plates are oppositely charged, there is no electric field at c. B) If both plates are negatively charged, the electric field at a points towards the top of the page. C) If both plates are positively charged, there is no electric field at b. 3. As shown in the figure above, a ball of mass 1.050 g and positive charge q =38.1microC is suspended on a string of negligible mass in a uniform electric field. We observe that the ball hangs at an angle of theta=15.0° from the vertical. What is the magnitude of the electric field?

## 1. Which of the following statements for electric field lines are true? (Give ALL correct answers, i.e., B, AC, BCD…) A) E-field lines point inward toward negative charges. B) E-field lines may cross. C) E-field lines do not begin or end in a charge-free region (except at infinity). D) Where the E-field lines are dense the E-field must be weak. E) E-field lines make circles around positive charges. F) A point charge q, released from rest will initially move along an E-field line. G) E-field lines point outward from positive charges. 2. Consider two uniformly charged parallel plates as shown above. The magnitudes of the charges are equal. (For each statement select T True, F False). A) If the plates are oppositely charged, there is no electric field at c. B) If both plates are negatively charged, the electric field at a points towards the top of the page. C) If both plates are positively charged, there is no electric field at b. 3. As shown in the figure above, a ball of mass 1.050 g and positive charge q =38.1microC is suspended on a string of negligible mass in a uniform electric field. We observe that the ball hangs at an angle of theta=15.0° from the vertical. What is the magnitude of the electric field?

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Que 1: in women who suffer from migraine …………………. are classified menstrual migraines, which tend to be more severe and longer lasting . a) 5% – 10% b) 45% – 55% c) 20% – 50% d) 65%-75% Que 2: why are the women on average, slightly shorter than men a) They have fat then man which contributes to stature b) Their long bones are sealed and stop growing earlier than men c) Their brains are somewhat smaller than man’s brain d) Their brains are somewhat larger than man, brain que 3: menopause frequently occurs between ………………..age of year a) 25-30 b) 45-55 c) 35-40 d) 65-75 que 4: this hormone causes enlargement of the larynx and an increase in the length and thickness of the vocal cords. A) estrogen 2) cholesterol 3) progesterone 4) testosterone Que 5: the reproductive cycle includes which of the following interconnected sets of events a) Ovarian cycle b) Urinary cycle c) Placental cycle d) Female prostate cycle Que 6: high level of circulating progesterone have been associated with : a) Excessive milk production b) Ovarian cancer c) Inability to breast feed a new born child d) Pregnancy Que 7: although variations exist, ovulation typically occurs on the …………day before mensuaration a) 1st b) 14th c) 7th d) 28th Que 8: LH stimulates interstitial cells a) To decrease GnRH b) To produce FSH c) To produce testosterones d) To produce sperm Que 9:what region of the uterus is shed during menstration? a) Stratum basalis of the myometrium b) Stratum basalis of the endometrium c) Stratum functionalis of the endometrium d) Perimetrium Que 10: the phenomenon is which women living in close proximity tend to menstruate at approximately the time is called. a) Precocious puberty b) Menstrual synchrony’ c) Delayed puberty d) Ovarian synchrony Que 11.studies have shown that healthy menstruating women a) Should not participate in sports b) Often feel ill or weak when exercising c) Are able to safety engage in athletic activities d) Can contaminate others and should not engage in contacts sports. Que 12: which term below describes a chemical that resembles steroid hormones and posses threat to maintain homeostasis. a) Androgens b) Prostaglandins c) Endocrine disruptors d) All of the above Que 13: one of the primary function of ……….is preparing and sustaining the uterus of pregnancy a) Testosterone b) Progesterone c) Estradiol d) inhibin Que 14: typically ovulation occurs a) at the end of the uterine phase b) at the start of follicular phase c) during an increase of LH in the ovarian cycle d) at the middle of the luteal phase

## Que 1: in women who suffer from migraine …………………. are classified menstrual migraines, which tend to be more severe and longer lasting . a) 5% – 10% b) 45% – 55% c) 20% – 50% d) 65%-75% Que 2: why are the women on average, slightly shorter than men a) They have fat then man which contributes to stature b) Their long bones are sealed and stop growing earlier than men c) Their brains are somewhat smaller than man’s brain d) Their brains are somewhat larger than man, brain que 3: menopause frequently occurs between ………………..age of year a) 25-30 b) 45-55 c) 35-40 d) 65-75 que 4: this hormone causes enlargement of the larynx and an increase in the length and thickness of the vocal cords. A) estrogen 2) cholesterol 3) progesterone 4) testosterone Que 5: the reproductive cycle includes which of the following interconnected sets of events a) Ovarian cycle b) Urinary cycle c) Placental cycle d) Female prostate cycle Que 6: high level of circulating progesterone have been associated with : a) Excessive milk production b) Ovarian cancer c) Inability to breast feed a new born child d) Pregnancy Que 7: although variations exist, ovulation typically occurs on the …………day before mensuaration a) 1st b) 14th c) 7th d) 28th Que 8: LH stimulates interstitial cells a) To decrease GnRH b) To produce FSH c) To produce testosterones d) To produce sperm Que 9:what region of the uterus is shed during menstration? a) Stratum basalis of the myometrium b) Stratum basalis of the endometrium c) Stratum functionalis of the endometrium d) Perimetrium Que 10: the phenomenon is which women living in close proximity tend to menstruate at approximately the time is called. a) Precocious puberty b) Menstrual synchrony’ c) Delayed puberty d) Ovarian synchrony Que 11.studies have shown that healthy menstruating women a) Should not participate in sports b) Often feel ill or weak when exercising c) Are able to safety engage in athletic activities d) Can contaminate others and should not engage in contacts sports. Que 12: which term below describes a chemical that resembles steroid hormones and posses threat to maintain homeostasis. a) Androgens b) Prostaglandins c) Endocrine disruptors d) All of the above Que 13: one of the primary function of ……….is preparing and sustaining the uterus of pregnancy a) Testosterone b) Progesterone c) Estradiol d) inhibin Que 14: typically ovulation occurs a) at the end of the uterine phase b) at the start of follicular phase c) during an increase of LH in the ovarian cycle d) at the middle of the luteal phase

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ELEC 2000 Semiconductor Devices Homework #1 Choose the answer that best completes the statement or answers the question. (1) Assume the valence electron is removed from a copper atom. The net charge of the atom becomes a. 0 b. +1 c. -1 d. +4 (2) The valence electron of a copper atom experiences what kind of attraction toward the nucleus? a. None b. Weak c. Strong d. Impossible to say (3) How many valence electrons does a silicon atom have? a. 0 b. 1 c. 2 d. 4 (4) Silicon atoms combine into an orderly pattern called a a. Covalent bond b. Crystal c. Semiconductor d. Valence orbit (5) An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? a. Doping b. Free electrons c. Thermal energy d. Valence electrons (6) The merging of a free electron and a hole is called a. Covalent bonding b. Lifetime c. Recombination d. Thermal energy (7) At room temperature an intrinsic silicon crystal acts approximately a. A Battery b. A conductor c. An insulator d. Copper wire (8) The amount of time between the creation of a hole and its disappearance is called a. Doping b. Lifetime c. Recombination d. Valence (9) A conductor has how many type of flow? a. 1 b. 2 c. 3 d. 4 (10) A semiconductor has how many types of flow? a. 1 b. 2 c. 3 d. 4 (11) For semiconductor material, its valence orbit is saturated when it contains a. 1 electron b. Equal (+) and (-) ions c. 4 electrons d. 8 electrons (12) In an intrinsic semiconductor, the number of holes a. Equal the number of free electrons b. Is greater than the number of free electrons c. Is less than the number of free electrons d. None of the above (13) The number of free electrons and holes in an intrinsic semiconductor decreases when the temperature a. Decreases b. Increases c. Stays the same d. None of the above (14) The flow of valence electrons to the right means that holes are flowing to the a. Left b. Right c. Either way d. None of the above (15) Holes act like a. Atoms b. Crystals c. Negative charges d. Positive charges (16) An donor atom has how many valence electrons? a. 1 b. 3 c. 4 d. 5 (17) If you wanted to produce a p-type semiconductor, which of these would you use? a. Acceptor atoms b. Donor atoms c. Pentavalent impurity d. Silicon (18) Electrons are the minority carriers in which type of semiconductor? a. Extrinsic b. Intrinsic c. n-Type d. p-type (19) Silver is the best conductor. How many valence electrons do you think it has? a. 1 b. 4 c. 18 d. 29 (20) Which of the following describes an n-type semiconductor? a. Neutral b. Positively charged c. Negatively charged d. has many holes (21) What is the barrier potential of a silicon diode a room temperature? a. 0.3 V b. 0.7 V c. 1 V d. 2 mV per degree Celsius

## ELEC 2000 Semiconductor Devices Homework #1 Choose the answer that best completes the statement or answers the question. (1) Assume the valence electron is removed from a copper atom. The net charge of the atom becomes a. 0 b. +1 c. -1 d. +4 (2) The valence electron of a copper atom experiences what kind of attraction toward the nucleus? a. None b. Weak c. Strong d. Impossible to say (3) How many valence electrons does a silicon atom have? a. 0 b. 1 c. 2 d. 4 (4) Silicon atoms combine into an orderly pattern called a a. Covalent bond b. Crystal c. Semiconductor d. Valence orbit (5) An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? a. Doping b. Free electrons c. Thermal energy d. Valence electrons (6) The merging of a free electron and a hole is called a. Covalent bonding b. Lifetime c. Recombination d. Thermal energy (7) At room temperature an intrinsic silicon crystal acts approximately a. A Battery b. A conductor c. An insulator d. Copper wire (8) The amount of time between the creation of a hole and its disappearance is called a. Doping b. Lifetime c. Recombination d. Valence (9) A conductor has how many type of flow? a. 1 b. 2 c. 3 d. 4 (10) A semiconductor has how many types of flow? a. 1 b. 2 c. 3 d. 4 (11) For semiconductor material, its valence orbit is saturated when it contains a. 1 electron b. Equal (+) and (-) ions c. 4 electrons d. 8 electrons (12) In an intrinsic semiconductor, the number of holes a. Equal the number of free electrons b. Is greater than the number of free electrons c. Is less than the number of free electrons d. None of the above (13) The number of free electrons and holes in an intrinsic semiconductor decreases when the temperature a. Decreases b. Increases c. Stays the same d. None of the above (14) The flow of valence electrons to the right means that holes are flowing to the a. Left b. Right c. Either way d. None of the above (15) Holes act like a. Atoms b. Crystals c. Negative charges d. Positive charges (16) An donor atom has how many valence electrons? a. 1 b. 3 c. 4 d. 5 (17) If you wanted to produce a p-type semiconductor, which of these would you use? a. Acceptor atoms b. Donor atoms c. Pentavalent impurity d. Silicon (18) Electrons are the minority carriers in which type of semiconductor? a. Extrinsic b. Intrinsic c. n-Type d. p-type (19) Silver is the best conductor. How many valence electrons do you think it has? a. 1 b. 4 c. 18 d. 29 (20) Which of the following describes an n-type semiconductor? a. Neutral b. Positively charged c. Negatively charged d. has many holes (21) What is the barrier potential of a silicon diode a room temperature? a. 0.3 V b. 0.7 V c. 1 V d. 2 mV per degree Celsius

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Que 1: studies have shown that healthy menstruating women : a) Should not participate in sports b) often feel ill or weak when exercising c) are able to safely engage in athletic activities d) can contaminate others and should not engage in contact sports

## Que 1: studies have shown that healthy menstruating women : a) Should not participate in sports b) often feel ill or weak when exercising c) are able to safely engage in athletic activities d) can contaminate others and should not engage in contact sports

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Intellectual (thinking) skills   Strongly Agree Agree Disagree Strongly … Read More...