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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