In an aluminium (Al) bar of square cross section, a square hole is drilled and is filled…
Physics · JEE Advanced · NTA Exams — Current Electricity
In an aluminium (Al) bar of square cross section, a square hole is drilled and is filled with iron (Fe) as shown in the figure. The electrical resistivities of Al and Fe are 2.7 × 10–8 W m and
1.0 × 10–7 W m, respectively. The electrical resistance between the two faces P and Q of the composite bar is
1.0 × 10–7 W m, respectively. The electrical resistance between the two faces P and Q of the composite bar is
Answer
(A)
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- A Galvanometer is an instrument that can be used to construct an ammeter for measuring current .It can be…
- A steady current flows in a metallic conductor of non-uniform cross-section. The quantity/quantities constant…
- Statement–1 : A 200 watt bulb glows with more brightness than 100 watt bulb. Statement–2 : 100 watt bulb has…
- If a steady current I is flowing through a cylindrical element ABC . Choose the correct relationship
- A microammeter has a resistance of 100 Ω and a full scale range of 50 μA. It can be used as a voltmeter or as…
- In a circuit shown in the figure, the capacitor C is initially uncharged and the key K is open. In this…
- Statement–1 : At cryogenic temperatures, the electrical resistivity in metallic conductors diminishes…
- A Galvanometer is an instrument that can be used to construct an ammeter for measuring current .It can be…
More Current Electricity questions · Browse all practice questions