1.------------------Converts the electrical energyfrom the source into other form of energy. *
a- Source
b- Load
c- Transmission system
2. The incandescent lamp is based on the-------------, in whichsolids and gases emit visible light when burning *
a- Principle of incandescence
b- Glowing
c- Filament
3. In 1908 Coolidge had developed a process to make tungsten--------- , or capable of being drawn into a wire without breaking.*
a- Highest melting point
b- Lightening system
c- Ductile
4. In 1878 British scientist ------------ invented the modern lightbulb, which used carbon filaments in evacuated glass bulbs. *
a- Edison
b- Sir Joseph Wilson Swan
c- Coolidge
5. The___________ regulates the current round the circuit. *
a- Control
b- Source
c- Transmission system
6.______________ is any material that offers little resistance tothe flow of an electric current. *
a- current
b- electrical conductor
c-absolute zero
7. A phenomenon known as ___________is observed when certainsubstances are cooled to a point near absolute zero. *
a- Superconductivity
b- Electricity
c- Solutions
8. The ___________for electrical applications would be a materialthat is absolutely non-conducting ; such a material does not exist.*
a- Free electrons
b- perfect insulator
c- germanium
9. In ordinary electric wiring,________ are commonly used asinsulating sheathing for the wire itself. *
a- Plastics
b- Enamel
c- Glass
10. ___________are substances which provides an easy path for anelectric current. All metals are conductors however some metals donot conduct well. *
a- Insulators
b- Conductors
c- Semiconductors
11. _________ are midway between conductors and insulators; undercertain conditions they allow a current to flow easily but underothers they behave as insulators. *
a- Insulators
b- Conductors
c- Semiconductors
12.___________is capacity of matter to perform work as the resultof its motion or its position in relation to forces acting on it.*
a- Energy
b- Modulation
c- Resistance
13. A weight suspended from a cord has ___________due to itsposition, in as much as it can perform work in the process offalling. *
a- kinetic energy
b- potential energy
c- mechanical energy
14. If a gun is fired, the potential energy of the gunpowder istransformed into the _____________of the moving projectile. *
a- Magnetic energy
b- Kinetic energy
c- Thermal energy