Practice Book for KVPY Aptitude Test - Stream SA Physics>Current Electricity>Electromotive Force: (EMF)

Electromotive Force: (EMF)

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KVPY Aptitude Test - Stream SA

IMPORTANT

Important Questions on Electromotive Force: (EMF)

MEDIUM

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Current Electricity>Electromotive Force: (EMF)> Q 1

A cell has an emf $1.5 V$ . When connected across an external resistance of $2 Ω$ , the terminal potential difference falls to $1.0 V$ . The internal resistance of the cell is

HARD

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Current Electricity>Electromotive Force: (EMF)> Q 2

$50 V$ battery is supplying current of $10 A$ when connected to a resistor. If the efficiency of battery at this current is $25 %$ . Then internal resistance of battery is,