physics

conductivity of semiconductor increases with increase in temperature, because

• number density of free charge carriers increases

• relaxation time increases

• both number density of free charge carriers and relaxation time increases

• number density of free charge carriers increases relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density

If an element is represented in nuclide notation, what is the number of neutrons?

• A

• Z

• A-Z

• N-Z

• 1

• 2

• 3

• 4

• a

• b

• c

• d

• a

• b

• c

• d

• a

• b

• c

• d

• a

• b

• c

• d

• 1

• 2

• 3

• 4

• 1

• 2

• 3

• 4

• 1

• 2

• 3

• 4