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Two semiconductor material have exactly the same properties except that material A has a bandgap of 1.0 eV and material B has a bandgap energy of 1.2 eV. The ratio of intrinsic concentration of material A to that of material B is
Which of the following components is used to create an N-type semiconductor? a. Trivalent impurity b. Pentavalent impurity c. Intrinsic semiconductor d. Extrinsic semiconductor
For a semiconductor to be called as p-type semiconductor, which one of the following element impurities are added to a pure semiconductor ?
A p-type semiconductor material is doped with ____________ impurities whereas a n-type semiconductor material is doped with __________ impurities
Match the items in column 1 and column 2 and choose the correct combination. Column 1 Column 2 A - Resilience 1 – Ability of the material to return to the original shape when load is removed B – Fatigue 2 – Capacity of a material to absorb energy elastically C – Stiffness 3 – Ability of material to absorb a certain amount of energy without failure D - Elasticity 4 – Resistance of the material to elastic deformation   5 – Failure of material at loads less than that at normal conditions  
AT Co makes a single product and is preparing its material usage budget for next year Each unit of product requires 2kg of material, and 5,000 units of product are to be produced next year Opening inventory of material is budgeted to be 800 kg and AT co budgets to increase material inventory at the end of next year by 20%.The material usage budget for next year is
Raw material purchased:
1st January, 600 units @ Rs. 12 per unit
12th January, 500 units @ Rs. 14 per unit
21st January, 300 units @ Rs. 13 per unit
Raw material issued for manufacture:
3rd January 300 units
5th January 124 units
15th January 250 units
16th January 300 units
Raw material returned to stores from manufacturing department on 14th January, 50 units. The material is issued on First-in-First out method.
The value of material remaining in store on 21st January will be:
The most commonly used semiconductor in the manufacture of a transistor is ___________
The most commonly used semiconductor is ___________
The impurity level in an extrinsic semiconductor is about of pure semiconductor.