Question

1.------------------Converts the electrical energy from the source into other form of energy. *
a- Source
b- Load
c- Transmission system
2. The incandescent lamp is based on the-------------, in which solids 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 light bulb, 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 to the flow of an electric current. *
a- current
b- electrical conductor
c-absolute zero
7. A phenomenon known as ___________is observed when certain substances are cooled to a point near absolute zero. *
a- Superconductivity
b- Electricity
c- Solutions
8. The ___________for electrical applications would be a material that 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 as insulating sheathing for the wire itself. *
a- Plastics
b- Enamel
c- Glass
10. ___________are substances which provides an easy path for an electric current. All metals are conductors however some metals do not conduct well. *
a- Insulators
b- Conductors
c- Semiconductors
11. _________ are midway between conductors and insulators; under certain conditions they allow a current to flow easily but under others they behave as insulators. *
a- Insulators
b- Conductors
c- Semiconductors
12.___________is capacity of matter to perform work as the result of 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 its position, in as much as it can perform work in the process of falling. *
a- kinetic energy
b- potential energy
c- mechanical energy
14. If a gun is fired, the potential energy of the gunpowder is transformed into the _____________of the moving projectile. *
a- Magnetic energy
b- Kinetic energy
c- Thermal energy

Answer 1

1. Option C: Transmission System

Because transmission system transmits the signal from one place to another so it contains transducers at the receiver and sender ends which convert electrical energy from the source into other form of energy or vice-versa.

2. Option A: Principle of incandescent

The incandescent lamp is based on the principle of incandescence, in an incandescent type of object, a current is passed through a thin metal filament which causes the heating of filament until it glows which in result produces the visible light.

3.Option C: Ductile

ductility makes the material capable of being drawn into a wire without breaking and the work is done by Coolidge, who gradually transformed tungsten from a brittle and unworkable metal to a durable and ductile filament.

4. Option A: Edison

In 1978, Edison invented a carbonized bamboo filament which could last over 1200 hours.

5. Option A: Control

It can be rheostat, gate, switch whatever which can regulate the current in the circuit.

6. Option B: Electric Conductor

Conductor is a material having maximum conductance and little resistance which allows the current to flow through it with ease.