0
Taka Posted 19 years ago
Grammar
pressure
To help his experiments, Edison designed a laboratory model of a transatlantic cable, in which cheap powdered carbon was used to simulate the electrical resistance of thousands of miles of wires.
Alas, the rumble of traffic outdoors, clattering in the machine shop, or even the scientists' footsteps shook the equipment enough to change the pressure of the connecting wires on the carbon, thus altering its resistance. Since the accuracy of the model depended upon constant resistance in the carbon, Edison finally abandoned this approach. But later, when confronted with the problem of how to improve the transmission of voices over the telephone, he used a funnel-shaped mouthpiece to focus sound waves on a carbon button.
The pressure of those vibrations altered the resistance in the circuit in synchrony with the speaker's voice. In other words, what ruined Edison's underwater-telegraphy experiments is exactly what made his telephone transmitter such a triumph.
Does 'the pressure' in red mean 'electrical pressure (i.e. voltage)' or the same 'phisical pressure' in blue?
Alas, the rumble of traffic outdoors, clattering in the machine shop, or even the scientists' footsteps shook the equipment enough to change the pressure of the connecting wires on the carbon, thus altering its resistance. Since the accuracy of the model depended upon constant resistance in the carbon, Edison finally abandoned this approach. But later, when confronted with the problem of how to improve the transmission of voices over the telephone, he used a funnel-shaped mouthpiece to focus sound waves on a carbon button.
The pressure of those vibrations altered the resistance in the circuit in synchrony with the speaker's voice. In other words, what ruined Edison's underwater-telegraphy experiments is exactly what made his telephone transmitter such a triumph.
Does 'the pressure' in red mean 'electrical pressure (i.e. voltage)' or the same 'phisical pressure' in blue?
Top answer
Taka To help his experiments, Edison designed a laboratory model of a transatlantic cable, in which cheap powdered carbon was used to simulate the electrical resistance of thousands of miles of wires. Alas, the rumble of traffic outdoors, clattering in the machine shop, or even the scientists' footsteps shook the equipment enough to change the pressure of the connecting wires on the carbon, thus altering its resistance. Since the accuracy of the model depended upon constant resistance in the carbon, Edison finally abandoned this approach.
- Taka To help his experiments, Edison designed a laboratory model of a transatlantic cable, in which cheap powdered carbon was used to simulate the electrical resistance of thousands of miles of wires.
- Alas, the rumble of traffic outdoors, clattering in the machine shop, or even the scientists' footsteps shook the equipment enough to change the pressure of the connecting wires on the carbon, thus altering its resistance.
- Since the accuracy of the model depended upon constant resistance in the carbon, Edison finally abandoned this approach.
- But later, when confronted with the problem of how to improve the transmission of voices over the telephone, he used a funnel-shaped mouthpiece to focus sound waves on a carbon button.
- The pressure of those vibrations altered the resistance in the circuit in synchrony with the speaker's voice.
Get the Weekly English Kit 📬
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
1 Answers
0
TakaTo help his experiments, Edison designed a laboratory model of a transatlantic cable, in which cheap powdered carbon was used to simulate the electrical resistance of thousands of miles of wires.
Alas, the rumble of traffic outdoors, clattering in the machine shop, or even the scientists' footsteps shook the equipment enough to change
0
Related Questions