3.3 Flashcards
Who invented the electron beam tube also known as the Braun tube
K.F. Braun 1850-1918
How many electrons is 1 C
6.24x 10^18
Is pure water a conductor
No
The direction of the electrons flowing through a conductor depends on what?
The polarity (which way they are connected)of the applied voltage
What is resistance
Ratio of voltage and current
What happens to current if voltage increases
Current also increases
If polarity does not change, what happens to the electrons flow
They flow in the same direction (DC)
What is electric current?
- Flow of electrons in one direction
- Caused by a voltage
- positive to negative
Liquid as electrical conductor
Hydrogen at negative pole
Oxygen at positive pole
Hydrogen accounts to 2/3 of the gas
Oxygen accounts to 1/3 of the gas
Mobile positive charge is found where?
Liquids and Gases
What is it called when flow direction is from negative to positive
Electron flow or Electron current flow
What is potential difference
Electrical voltage occurs at two different charged points
How is voltage generated
By separating positive and negative charges
What direction does electrical current flow
Positive to negative pole
Formula for voltage
V=I X R
Voltage = Current X Resistance
What happens to water when acids,bases and salt is added
It becomes a conductor and decomposes
What is the formula for current (I)
Current (I) = Charge (Q)/ Time (t)
Charge (Q)= Current (I) X Time (t)
What is voltage and another name for voltage can be?
Difference between two electrically charged points.
Also known as Electromotive Force(EMF)
What is 1C equal to?
1 Ampere-second
What type of gas is filled in a filament bulb
Nitrogen, argon or krypton
What is the unit for charge and it’s symbol
Coulomb (C) and Q
