Q': choice the correct answer in each of the following 1. With rise in temperature the electrical conductivity of intrinsic semiconductor: a. Increase b. decrease c. Increase and then decrease d....


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Q': choice the correct answer in each of the following<br>1. With rise in temperature the electrical conductivity of intrinsic semiconductor:<br>a. Increase<br>b. decrease<br>c. Increase and then decrease<br>d. decrease and then Increase<br>2. In a semiconductor<br>a. There are no free electrons at any temperature<br>b. There are no free electrons at OK<br>c. Number of free electrons more than that<br>d. None of the above<br>3.Which of the following characteristics of electrons determines the current in<br>a conductor?<br>(a) Drift velocity alone.<br>(b) Thermal velocity alone.<br>(c) Both drift velocity and thermal velocity.<br>(d) Neither drift nor thermal velocity.<br>4.If the electric current in a coil is doubled the magnetic flux density<br>a) halves<br>b) remains unchanged<br>c) doubles<br>d) quadruples<br>

Extracted text: Q': choice the correct answer in each of the following 1. With rise in temperature the electrical conductivity of intrinsic semiconductor: a. Increase b. decrease c. Increase and then decrease d. decrease and then Increase 2. In a semiconductor a. There are no free electrons at any temperature b. There are no free electrons at OK c. Number of free electrons more than that d. None of the above 3.Which of the following characteristics of electrons determines the current in a conductor? (a) Drift velocity alone. (b) Thermal velocity alone. (c) Both drift velocity and thermal velocity. (d) Neither drift nor thermal velocity. 4.If the electric current in a coil is doubled the magnetic flux density a) halves b) remains unchanged c) doubles d) quadruples
5.In a N-type semiconductor, the position of Fermi-level<br>a. Is lower than the center of energy gap<br>b. Is at the center of energy gap<br>c. Is higher than the center of energy gap<br>d. Can be any where<br>6. The energy gap in a semiconductor<br>a. Increases with temperature<br>b. Does not change with temperature<br>c. Decreases with temperature<br>d. Is zero<br>7. In an intrinsic semiconductor, the mobility of electrons in the conduction band<br>is:<br>a. Less than the mobility of holes in the valence band<br>b. Zero<br>c. Greater than the mobility of holes in the valence band<br>d. None of the above<br>

Extracted text: 5.In a N-type semiconductor, the position of Fermi-level a. Is lower than the center of energy gap b. Is at the center of energy gap c. Is higher than the center of energy gap d. Can be any where 6. The energy gap in a semiconductor a. Increases with temperature b. Does not change with temperature c. Decreases with temperature d. Is zero 7. In an intrinsic semiconductor, the mobility of electrons in the conduction band is: a. Less than the mobility of holes in the valence band b. Zero c. Greater than the mobility of holes in the valence band d. None of the above

Jun 04, 2022
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