1 Electrostatics and Current Flashcards
When two insulating materials are rubbed together, which particle is transferred between them?
An electron** would **transfer from one insulator to the other.
What sort of material does not allow charge to flow through it easily?
an insulator such as plastic or wood
A polythene rod is charged by friction and scraped across a nanocoloumbmeter, which charge will the nanocoulombmeter adopt?
Nanocoulombmeter becomes negatively charged
Explanation
Electrons transfer from the cloth to the polythene rod. The rod becomes negatively charged
This electrons transfers from the polythene rod to the nanocoulombmeter
Name three uses of electrostatics
- electrostatic smoke removal from chimneys
- photocopier
- inkjet printer
- electrostatic paint sprayer
Where are neutrons located in an atom?
the nucleus
What charge would a rod adopt if 3nC of electrons were transferred from a cloth to the surface of the rod?
- 3 nC
What is an induced charge?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/340/961/111/q_image_thumb.jpg?1570898257)
When a neutral object has a separation of charge within itself.
Electrons move from one side of the object to the other.
The side with more electrons is negatively charged
The side with fewer electrons is positively charged.
Overall the charge is neutral- charge is only displaced within the object itself
What would happen if two negatively charge balloons were hung side by side?
They would repel because like charges repel
![](https://s3.amazonaws.com/brainscape-prod/system/cm/340/961/112/a_image_thumb.jpg?1570898432)
What does the prefix nano stand for in 10 nC
nano is 10-9
or
10nC = 10 x 10-9 C
What is the definition for current?
The rate of flow of charge
OR
The number of coulombs passing a point in a circuit per unit time
Explain why only electrons are transferred when objects are charged by friction.
Electrons are located in the outer shells of an atom and are easily removed.
However, protons are located in the nucleus at the centre of the atom and are tightly bound.
What is the current if 100 C passes in 200s ?
Q=It
I = Q/t
I = 100 C/ 200 s
I = 0.5 A
A polythene rod is charged by friction and scraped across a nanocoloumbmeter, what charge will the nanocoulombmeter adopt?
Nanocoulombmeter becomes negatively charged
Explanation
Polythene gains electron from the cloth to become negatively charged
The electrons transfers from the polythene rod tot the nanocoulombmeter
What does the prefix micro stand for in 100 uA
micro is 10-6
or 1
00 uC = 100 x 10-6 C
What is the symbol for an ammeter and how is it connected in the circuit?
An ammeter is connected in series
![](https://s3.amazonaws.com/brainscape-prod/system/cm/340/961/124/a_image_thumb.jpg?1509025351)
A acetate rod is charged by friction and scraped across a nanocoloumbmeter, what charge will the nanocoulombmeter adopt?
Nanocoulombmeter becomes positively charged
Explanation
Acetate loses electron to the cloth to become positively charged
Electrons transfer from the nanocoulombmeter to the rod, leaving the nanocoulombmeter positive.