Resistivity
A wire of length 2 m, cross-sectional area 1 mm², and resistivity 1.7 × 10⁻⁸ Ω·m has what resistance?
Select the correct option:
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More current electricity Practice Questions
A uniform wire of length 2 m and cross-sectional area 1 square millimetre is found to have a resista...
A uniform wire of length 2 m and cross-sectional area 1 square millimetre is found to have a resista...
A battery of emf 12 volts and internal resistance 3 ohm drives a variable load resistor, so for what...
A battery of emf 12 volts and internal resistance 3 ohm drives a variable load resistor, so for what...
Engineers relate the current density inside a conductor to the local electric field through the mate...
Engineers relate the current density inside a conductor to the local electric field through the mate...
Three identical cells, each with internal resistance 0.6 ohm, are connected in parallel to reduce th...
Three identical cells, each with internal resistance 0.6 ohm, are connected in parallel to reduce th...
Four identical cells, each of emf 1.5 volts and internal resistance 0.2 ohm, are connected in series...
Four identical cells, each of emf 1.5 volts and internal resistance 0.2 ohm, are connected in series...
An electric heater rated to carry 5 amperes operates across a 220 volt mains supply in a kitchen, so...
An electric heater rated to carry 5 amperes operates across a 220 volt mains supply in a kitchen, so...
Current passes through a 20 ohm resistor at 2 amperes for 5 minutes in a demonstration, so how much ...
Current passes through a 20 ohm resistor at 2 amperes for 5 minutes in a demonstration, so how much ...
Applying the loop rule around any closed mesh of a resistive network sets the algebraic sum of certa...
Applying the loop rule around any closed mesh of a resistive network sets the algebraic sum of certa...
Two resistors of 6 ohm and 3 ohm are wired side by side between the same two nodes of a circuit, so ...
Two resistors of 6 ohm and 3 ohm are wired side by side between the same two nodes of a circuit, so ...
In a meter bridge the balance point is found at 40 cm from one end while the known resistance in the...
In a meter bridge the balance point is found at 40 cm from one end while the known resistance in the...
A cell of emf 6 volts and internal resistance 0.5 ohm is connected to an external resistor of 2.5 oh...
A cell of emf 6 volts and internal resistance 0.5 ohm is connected to an external resistor of 2.5 oh...
At a junction in a network, currents of 5 A and 3 A enter while currents of 4 A and I leave through ...
At a junction in a network, currents of 5 A and 3 A enter while currents of 4 A and I leave through ...
About This Question
- Subject
- physics
- Chapter
- current electricity
- Topic
- resistivity
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
0.034 Ω
- Resistance Formula: R=ρAL, where ρ is resistivity, L is length, and A is area.
- Unit Conversion: Area A=1 mm2=1×(10−3 m)2=10−6 m2.
- Identification: L=2 m and ρ=1.7×10−8 Ω⋅m.
- Calculation:
- R=10−61.7×10−8×2
- R=3.4×10−8×106=3.4×10−2.
- Result: R=0.034 Ω.
This medium difficulty physics question is from the chapter current electricity, covering the topic of resistivity. It appeared in the 2025 exam.
Looking for more practice? Explore all physics questions or browse current electricity questions on RankGuru.