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CBSE Notes 2011-2012 » X-Science-Part1

Electricity

Two resistors of resistance 2 Q and 4 Q when connected to a battery will have

Multiple choice question

Two resistors of resistance 2 Q and 4 Q when connected to a battery will have

Unit of electric power may also be expressed as

Multiple choice question

Unit of electric power may also be expressed as

A cylindrical conductor of length I and uniform area of cross-section A has resistance R. Another co...

Multiple choice question

A cylindrical conductor of length I and uniform area of cross-section A has resistance R. Another conductor of length 21 and resistance R of the same material has area of cross-section

If the current I through a resistor is increased by 100 % (assume that temperature remains unchanged...

Multiple choice question

If the current I through a resistor is increased by 100 % (assume that temperature remains unchanged), the increase in power dissipated will be

The resistivity does not change if

Multiple choice question

The resistivity does not change if

In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respecti...

Multiple choice question

In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness ?

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