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Physics 10 Chapter 14 - Current and Electricity - 16
1.
Which relation is correct about filament of lamp and temperature?
a) Resistance of filament rises as temperature decreases
b) Resistance of filament falls as temperature increases
c) Resistance of filament rises as temperature increases
d) Resistance of filament falls as temperature decreases
2.
Which relation is correct about filament of lamp and temperature?
a) Current decreases as temperature increases
b) Current increases as temperature decreases
c) Current decreases as temperature decreases
d) Current increases as temperature increases
3.
What is the heat sensitive resistor called?
a) Tungsten
b) Transducer
c) Filament
d) Thermister
4.
Which relation is correct about thermister and temperature?
a) Current increases as temperature increases
b) Current decreases as temperature increases
c) Current increases as temperature decreases
d) Current decreases as temperature decreases
5.
Upon which of the following factors, the resistance of a wire depends?
a) Length of the wire
b) Cross-section of the wire
c) Nature of material
d) All of these
6.
The resistance R of the wire is directly proportional to the..................?
a) Length of the wire
b) Cross-section of the wire
c) Temperature of the wire
d) Nature of wire
7.
If we double the length of the wire, what will be the effect on its resistance?
a) Resistance will be increase 3 times
b) Resistance will be halved
c) Resistance will be doubled
d) Resistance will be decrease 3 times
8.
If we half the length of the wire, what will be the effect on its resistance?
a) Resistance will be halved
b) Resistance will be doubled
c) Resistance will be increase 3 times
d) Resistance will be decrease 3 times
9.
The resistance R of the wire is inversely proportional to the..................?
a) Nature of wire
b) Temperature of the wire
c) Length of the wire
d) Cross-section of the wire
10.
On heating, more free electrons become available for .................of current?
a) Conduction
b) None of these
c) Convection
d) Radiation
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