Question
Download Solution PDFWhich among the following is a unit of resistivity ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Ohm-meter.
CONCEPT:
Resistivity (ρ):
- Resistivity is numerically equal to the resistance of a substance having a unit area of cross-section and unit length.
- Mathematically it can be written as,
\(\rho = \frac{{RA}}{l}\)
EXPLANATION:
SI unit of resistance = ohm
SI unit of area = meter2
SI unit of length = meter
SI unit of resistivity is -
\(\therefore \rho = \frac{{ohm - mete{r^2}}}{{meter}} = ohm - meter\)
Important Points
|
Quantity |
Unit |
Dimension |
|
Resistance (R) |
ohm |
[ML2T-3A-2] |
|
Capacitance (C) |
Coulomb/volt or Farad |
[M-1L2T4A2] |
|
Resistivity or Specific resistance (ρ) |
Ohm-meter |
[ML3T-3A-2] |
|
Electric current (I) |
Ampere |
[A] |
|
Electric charge (q) |
Coulomb |
[AT] |
|
Inductance (H) |
henry |
[ML2T-2A-2] |
Last updated on May 13, 2024
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