Section 6- Electricity

Question 1

1)what is the rate of flow of electric charge?
2) Total current leaving a junction is equal to?
3)what does ammeter measures?
4)what does voltmeter measures?
5)What way does conventional current?
6)what way does electrons flow?

Answer 1

1) Rate of flow of electric charge Q=IT
2) equal to total current entering it
3)current
4)potential difference
5) Currents in a circuit is anti-clockwise positive to negative
6) Electrons in circuit flow clockwise negative to positive

Question 2

1)where does more current go to?
2)where is current the same?
3)How is current shared?

Answer 2

1)where there is less resistance
2) current series circuit is the same
3)

Question 3

Practical: Do experimental values match the kirchoffan predictions Value predicted vs measured value
1)How do you record results?

Answer 3

1) only and always record the full number of d.p that your apparatus shows

Question 4

1)what is electric current?
2)what is potential difference?
3)what is resistance defined as?

Answer 4

1) Electric current as the rate of flow of charge.
2) potential difference as work done per unit charge.
3) R = V/I

Question 5

1)what is current?
2)what is charge?
3)what are electrons considered as?

Answer 5

1) Current= rate of which charge flows past a point
2)Charge: electrons, ions, fields, charges particles (quarks, positrons, heions) , holes in semi conductors
3)electrons as charge carriers

Question 6

1)How do metals conduct electricity?
2)Describe the structure of metals which helps them conduct electricity? (4)
3)How does temperature effect metals conduct electricity? (2)
4)How do ions conduct charge?

Answer 6

1) delocalised electrons move through a metal
2)
->Higher current moves more
->cooler= higher current
->thicker wires= higher current
->short wires= higher current
3)
->when warmer ions/nuclei vibrate more
->when ions (positive) and electrons interact the electrons flow is obstructed or becomes absorbed into atom
4)
Describe: when in liquids gasses or solutions
Explain: ions flow towards the terminal

Question 7

1)What are the two charge equations and how to find the number of electrons?

Answer 7

Question 8

1)Positive charges flow….?
2)Negative charges flow…..?

Answer 8

1)charges that flow are positive (move in the same direction as current flows)
2)negative (move in the opposite direction that current flows).