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CBSE Notes 2011-2012 » XII-Physics

Current Electricity

As P I:R. it becomes four times.

Short answer question

As P I:R. it becomes four times.

A wire of resistivity 'p' is stretched to twice its length. What will be its new resistivity ? [Delh...

Short answer question

A wire of resistivity 'p' is stretched to twice its length. What will be its new resistivity ?
[Delhi 2003]

What are superconductors ? [AI 2003]

Short answer question

What are superconductors ? [AI 2003]

Name the physical quantity which has joule coulomb"' as its unit. Is it a scalar or a vector quantit...

Short answer question

Name the physical quantity which has joule
coulomb"' as its unit. Is it a scalar or a vector
quantity ?

You are asked to measure emf of a cell. Which instrument will you use

Short answer question

You are asked to measure emf of a cell. Which
instrument will you use

How does the drift velocity of electrons in a metallic conductor vary with increase in temperature ?...

Short answer question

How does the drift velocity of electrons in a
metallic conductor vary with increase in
temperature ? [Delhi 2002]

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