Physics MCQs

Page No. 65

A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part _________________?


aremains the same


b is doubled


cis halved


dbecomes zero


View Answer remains the same

Resistance of a conductor depends upon_________________?


anature of conductor


bdimension of conductor


cphysical state of the conductor


dall of above


View Answer all of above

All electrical appliances are connected in parallel to each other between the main line and neutral wire to get ______________________?


asame current


bsame current and potential difference


c different current but same potential difference


ddifferent current and potential differences



Why should a resistance be introduced in a circuit in series deliberately ?


ato increase current


bto decrease current


cto control current


d just to give a good look to circuit


View Answer to decrease current

If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be_______________?


a3600C


b7200C


c1C


d2C


View Answer 3600C

Which one of the following materials is useful for making bulb filaments ?


aconstantan


bnichrome


ccopper


dtungsten


View Answer tungsten

In the following figure, the terminal potential is ___________________ ?


azero


b2V


c12V


d36V


View Answer zero

Specific resistance of a wire____________________?


awill depend on its length


bwill depend on its radius


cwill depend on the type of material of the wire


dwill depend on none of the above



There are three bulbs of 60W 100W and 200W which bulb has thickest filament ?


a100W


b200W


c60W


dall


View Answer 200W

Circuit which gives continuously varying potential is called _______________________?


acomplex network


bwheat stone bridge


cpotential divider


dall of above


View Answer potential divider

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