EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 24 - Current Electricity>KEAM 2020>Q 7

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In a platinum resistance thermometer, the resistances of the wire at ice point and steam point are of $4 Ω$ and $4.25 Ω$ 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 $4.5 Ω .$ The temperature of the hot water bath 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 2019>Q 8

The resistor

R_{1} = 3 Ω

and

R_{2} = 1 Ω

are connected in parallel to a

20 V

battery. Find the heat developed in the resistor

R_{1}

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 $5 V$ and internal resistance $0.1 Ω$ 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

r_{0}

located at position

\pm 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

\underline{r_{0}}

parallel to the capacitor plates is located at

\bar{2}

the center. Which of the following statements is correct ?