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Electronic Devices and Circuits

Electronic Devices and Circuits
Light dependent resistors are

Either A or B
Highly doped semiconductor
Lightly doped semiconductor
Intrinsic semiconductor

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Electronic Devices and Circuits
The most commonly used semiconductor material is

Mixture of silicon and germanium
None of these
Germanium
Silicon

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Electronic Devices and Circuits
In the sale of diamonds the unit of weight is carat. One carat is equal to

100 mg
500 mg
150 mg
200 mg

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Electronic Devices and Circuits
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is

In arbitrary direction
Antiparallel to magnetic field
In the direction of current
Normal to both current and magnetic field

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Electronic Devices and Circuits
Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.

False
True

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Electronic Devices and Circuits
Which variety of copper has the best conductivity?

Hard drawn copper
Induction hardened copper
Pure annealed copper
Copper containing traces of silicon

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