An antenna (plural antennae or antennas), or aerial, is an electrical device which converts electric power into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver. In transmission, a radio transmitter supplies an electric current oscillating at radio frequency (i.e. a high frequency alternating current (AC)) to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves). In reception, an antenna intercepts some of the power of an electromagnetic wave in order to produce a tiny voltage at its terminals, that is applied to a receiver to be amplified. 

Typically an antenna consists of an arrangement of metallic conductors (elements), electrically connected (often through a transmission line) to the receiver or transmitter. An oscillating current of electrons forced through the antenna by a transmitter will create an oscillating magnetic field around the antenna elements, while the charge of the electrons also creates an oscillating electric field along the elements. These time-varying fields radiate away from the antenna into space as a moving transverse electromagnetic field wave. Conversely, during reception, the oscillating electric and magnetic fields of an incoming radio wave exert force on the electrons in the antenna elements, causing them to move back and forth, creating oscillating currents in the antenna. QUESTIONS:

Q1:
1. What is the main topic of the article?
2. What is the article's main topic?
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Q2:
1. Is there another name for an antenna?
2. Does the article mention another name for an antenna?
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Q3:
1. What is another name for an antenna?
2. The article mentions what other name for an antenna?
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Q4:
1. What does an antenna do?
2. What purpose does an antenna have?
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Q5:
1. Does an antenna convert electrical waves into radio waves all by itself?
2. is an antenna used on its own in order to convert electrical waves into radio waves?
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Q6:
1. What is the name of the device that must be present alongside an antenna in order to convert electrical waves into radio waves other than a radio receiver?
2. Electrical waves are converted into radio waves thanks to what device alongside an antenna other than a radio receiver?
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Q7:
1. What is the name of the device that must be present alongside an antenna in order to convert electrical waves into radio waves other than a radio transmitter?
2. Electrical waves are converted into radio waves thanks to what device alongside an antenna other than a radio transmitter?
3. 
Q8:
1. What type of electricity is used by an antenna in order to convert electrical waves into radio waves?
2. Electrical waves are converted into radio waves by antenna thanks to what type of electricity?
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Q9:
1. An antenna consists of an arrangement of what object?
2. What object is does an antenna consist of?
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Q10:
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Q11:
1. Are antenna known to use low frequency waves?
2. Are low frequency waves used in transmitting radio waves?
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