The reciprocal of the resistivity of a material is called its?
- Impedance
- Conductivity
- Admittance
- Resistance
Explanation
- Resistivity (ρ) is a measure of how strongly a material opposes the flow of electric current.
- The reciprocal of resistivity is called conductivity (σ).
Mathematically:
σ = 1 / ρ
- Conductivity indicates how easily a material allows the flow of electric current.
- The other options:
- Impedance relates to resistance and reactance in AC circuits.
- Admittance is the reciprocal of impedance.
- Resistance is the opposition to current flow but depends on dimensions, unlike resistivity.
Related MCQs
ریت کے مالیکیول کا فارمولا کیا ہے؟
- SiO₂
- S₂iO
- Si₂O
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
مندرجہ ذیل میں سے کون سا جسمانی مقدار ہے؟
- Weight
- Temperature
- Force
- Speed
اس سوال کو وضاحت کے ساتھ پڑھیں
آنکھوں کے سامنے دھندلی تصویر ______ کی وجہ سے بنتی ہے؟
- Light focused in front of the retina
- Light focused behind the retina
- Light focused at a point on retina
- Light focused at a point beyond retina
اس سوال کو وضاحت کے ساتھ پڑھیں
- 50 J
- 40 J
- 30 J
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
توانائی کا قابل تجدید ذریعہ نہیں ہے۔ _____
- Solar energy
- Coal
- Wind energy
- Geothermal energy
اس سوال کو وضاحت کے ساتھ پڑھیں
Leave a Reply
Your email address will not be published. Required fields are marked *
