Physics Chemistry & Biology Test 3
Resistance of conductor whose length having 1 unit and area of cross section also 1 unit is called as ?
  • Specific Conductance
  • None of the above
Explanation:

Specific resistance, also known as resistivity, is the resistance of a conductor with a length of 1 unit and an area of cross-section of 1 unit.

High Voltage means ?
  • High resistance and High current
  • Low resistance and High current
  • High resistance and Low current
  • Low resistance and Low current
Explanation:

High voltage refers to a significant potential difference in an electrical circuit, resulting in low resistance and enabling a large current to flow, which is essential for efficient energy transmission.

Salt water is called as ?
  • salt solution
  • Brine Solution
  • Salty
  • None of the above
Explanation:

Brine is a term used specifically for saltwater that contains a high concentration of salt.

Pure water has ___________ ?
  • Less resistance
  • More resistance
  • Normal resistance
  • None of the above
Explanation:

Pure water is a poor conductor of electricity and has higher resistance compared to saltwater or other conductive solutions.

Absolute temperature ?
  • -272⁰ C
  • 272-⁰ C
  • 0⁰ C
  • -273⁰ C
Explanation:

Absolute temperature, also known as absolute zero, is defined as 0 Kelvin (0 K), which is equivalent to -273.15°C.

At Absolute temperature, semiconductors behaves like
  • Perfect Insulator
  • Perfect Conductor
  • Semi Conductor
  • None of the above
Explanation:

At absolute temperature (-273°C or 0 K), semiconductors behave like perfect insulators because there are no available charge carriers to conduct electricity.

In semiconductor, On decrease of temperature, Resistance ?
  • Increases
  • Decreases
  • Constant
  • Explanation:

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