Physics Chemistry & Biology Test 3
In semiconductor, On decrease of temperature, Resistance ?
  • None
Explanation:

In semiconductors, as the temperature decreases, the resistance increases because there are fewer charge carriers available to conduct electricity.

In semiconductor, On increase of temperature, Resistance ?
  • Increases
  • Decreases
  • Constant
  • None
Explanation:

In semiconductors, as the temperature increases, the resistance decreases.

This occurs because higher temperatures provide more energy to the charge carriers, allowing them to move more freely and conduct electricity more effectively.

If temperature of metal and electric resistance decreases, then strength of current ?
  • Increases
  • Decreases
  • Constant
  • None of the above
Explanation:

When the temperature of a metal decreases, its electrical resistance also decreases, allowing more current to flow through the conductor, thus increasing the strength of the current.

If temperature of metal and electric resistance increases, then strength of current ?
  • Increases
  • Decreases
  • Constant
  • None of the above
Explanation:

When the temperature of a metal increases, its electrical resistance typically increases as well. This higher resistance reduces the flow of current, leading to a decrease in the strength of the current.

If temperature of the metals decreases, Resistance ?
  • Increases
  • Decreases
  • Constant
  • None of the above
Explanation:

When the temperature of metals decreases, their electrical resistance typically decreases as well. This lower resistance allows for a greater flow of current.

Negative charge flow from ?
  • Low potential to High potential
  • High potential to Low potential
  • Both a and b
  • None of the above
Explanation:

In an electric field, negative charges (electrons) flow from areas of lower electric potential to areas of higher electric potential, which is the opposite direction of positive charge flow.

Positive charge flow from ?
  • Low potential to High potential
  • High potential to Low potential
  • Both a and b
  • None of the above
  • Explanation:

    Positive charge flows from high potential to low potential, following the direction of electric field lines. This movement occurs due to the electric forces acting on the charged particles.