As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor ___________

Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -

A

5 : 8

B

10 : 9

C

8 : 5

D

9 : 10

The impurity level in an extrinsic semiconductor is about of pure semiconductor.

A

10 atoms for 108 atoms

B

1 atom for 108 atoms

C

1 atom for 104 atoms

D

1 atom for 100 atoms

When a pure semiconductor is heated, its resistance ___________

A

Goes up

B

Goes down

C

Remains the same

D

Can?t say

If the doping level is increased, the breakdown voltage of the Zener ___________

A

Remains the same

B

Is increased

C

Is decreased

D

None of the above

The doping level in a zener diode is ___________ that of a crystal diode

A

the same as

B

less than

C

more than

D

none of the above

নিম্নের কোনটি p-টাইপ অর্ধপরিবাহীতে n-টাইপ অর্ধপরিবাহীর তুলনায় বেশি আছে? (Which of the following does a p-type semiconductor have more compared to an n-type semiconductor-)

A

মোট ধনাত্মক আধান (total positive charge)

B

মোট আধান (total charge)

C

ইলেকট্রন ঘনত্ব (density of electrons)

D

হোল ঘনত্ব (density of holes)

Bulk modulus of a fluid __________ as the pressure increases.

A

Remain same

B

Decreases

C

Increases

D

None of these

As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient

A

Continues to increase

B

Continues to decrease

C

Goes through a minimum

D

Goes through a maximum

When a pentavalent impurity is added to a pure semiconductor, it becomes

A

An insulator

B

An intrinsic semiconductor

C

p-type semiconductor

D

n-type semiconductor

In a rare coin collection, all coins are either pure gold or pure silver , and there is initially one gold coin for every three silver coins . With the addition of 10 more gold coins to the collection, the ratio of gold coins to silver coins is 1 to 2. Based on this information , how many total coins are there now in this collection (after the acquisition)?

A

40

B

50

C

70

D

90

As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor ___________

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