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The electrical conductivity of a metal is

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Important Questions on Current Electricity

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 24 - Current Electricity>KEAM 2018>Q 4
Consider a cylindrical conductor of length L and area of cross-section A. The specific conductivity varies as σx=σ0Lx where x is the distance along the axis of the cylinder from one of its ends. The resistance of the system along the cylindrical axis is
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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 24 - Current Electricity>KEAM 2020>Q 5
A steady current flows in a metallic conductor of non-uniform cross section. The quantity/quantities that remains/remain constant along the length of the conductor is/are
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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 24 - Current Electricity>KEAM 2019>Q 6

Find the voltage and current passing through the resistor R2 shown in the following circuit

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 24 - Current Electricity>KEAM 2020>Q 7
In a platinum resistance thermometer, the resistances of the wire at ice point and steam point are of 4Ω and 4.25Ω respectively. When the thermometer is kept in a hot water bath, whose temperature is not known, the resistance of the wire is found to be 4.5Ω. The temperature of the hot water bath is
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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 24 - Current Electricity>KEAM 2019>Q 8
The resistor R1=3 Ω andR2=1 Ω are connected in parallel to a 20 V battery. Find the heat developed in the resistor R1 in one minute
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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 24 - Current Electricity>KEAM 2020>Q 9
Internal resistance of a cell is independent of
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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 24 - Current Electricity>KEAM 2020>Q 10

Six cells, each of emf 5V and internal resistance 0.1Ω are connected as shown in Figure. The reading of the ideal voltmeter V is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 24 - Current Electricity>KEAM 2019>Q 11
A parallel plate capacitor (of capacitance C) with circular plates of radius r0 located at position ±α, is connected in series with a resistor R and is charged by a battery of voltage V. Consider a circular loop L of radius r0¯ parallel to the capacitor plates is located at 2¯ the center. Which of the following statements is correct ?