The electrical resistance (R) of a wire is given by the formula $R = \rho L/A$, where $\rho$ is resistivity, L is length, and A is the cross-sectional area ($\pi (d/2)^2$).
Two wires have their lengths, diameters and resistivities, all in the ratio of 1: 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire is
Asked in UPPCS Prelims 2001 · Topic: Conductivity (Electrical Conductivity and Resistivity: Definitions, Units, and Ohm's Law)
More Physics questions
- The best Conductor of Electricity is:
- For a metallic wire, the ratio $\frac{V}{I}$ [V = applied potential difference and I = current flowing] is
- Which among the following has maximum electrical resistivity?
- Electrical resistivity of a given metallic wire depends upon :
- Electric press, heater, electric kettle etc. are made of which element?
- What is the reason behind using copper wires in domestic electrical wiring?
- On which of the following does the resistance of a conductor depend ?
- When a piece of pure silicon is doped with aluminium, then