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JE 2019 || Day 4 || Magnetic Circuits Quiz 1

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Question 1

The Electrical conductivity of Intrinsic semiconductor increases with increases in temperature because

Question 2

The electrical conductivity of a semiconductor increases with increase in temperature because

Question 3

The temperature coefficient of resistance of a doped semiconductor is

Question 4

When a very small amount of higher conducting metal is added to a conductor, its conductivity will

Question 5

The electrical resistivity of many metals and alloys drops suddenly to zero when they are cooled to a low temperature (i.e., nearly equal to liquid helium temperature). Such materials (metals and alloys) are known as

Question 6

The resistivity of hard drawn copper at 20 °C is The resistivity of annealed copper compared to hard drawn copper is

Question 7

The magnitude of magnetic field strength H is independent of

Question 8

Photoconductivity is a characteristic of semiconductors. When light falls on certain semiconductors, it

Question 9

When the temperature of a ferromagnetic material exceeds the Curie temperature, it behaves similar to a

Question 10

At a measuring frequency of 1012 Hz, the dielectric constant of a material will be due to

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Aug 6ESE & GATE EE