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1. In a semiconductora) there are no free electrons at 0 Kb) there are no free electrons at any temperature c) the number of free electrons increases with pressure d) the number of free electrons is more than that in a conductorDeselect Answer
2. Of the diodes shown in the following diagrams, which one is reverse biased ?A) (a) B) (b)C) (c) D) (d)Deselect Answer
3. In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table.A) (a) B) (b) C) (c) D) (d)Deselect Answer
4. In the combination of the following gates the output Y can be written in terms of inputs A and B asDeselect Answer
5. Which process will increase the temperature of the system without heating it?a) Adiabatic compression b) Adiabatic expansion c) Isothermal compression d) Isothermal expansionDeselect Answer
6. A body has its centre of mass at the origin. The x-coordinates to the particlesa) May be all positive b) May be all negative c) Maybe positive for same case and negative for the other cases d) Always zeroDeselect Answer
a) 2J b) 5Jc) 18Jd) 11JDeselect Answer