CUrrent of electricity

Question 1

Current and charge eqn

Answer 1

I=QT

Question 2

Current

Answer 2

the rate of flow of charge with respect to time

Question 3

How charges move

Answer 3

Potential dff drive movement of charges

Question 4

WHats emf

Answer 4

The emf of an electrical source is work done by source in dirving unit charge around a complete circuit

Question 5

Formula for emf

Answer 5

E=W/Q

Question 6

Whats PD

Answer 6

PD across a component in a circuit is work done to drive a unit charge thru the component. V=W/Q

Question 7

Difference between emf and pd

Answer 7

emf convert other types of energy to electrical energy

pd convert electrical energy to other forms of energy

Question 8

Whats resistance

Answer 8

Its the ratio of pd across it to the current flowing thru it

Question 9

Formula to find resistance in conductor (NOT V=IR, THE OTHER ONE)

Answer 9

R =pl/A

Question 10

Whats Ohms Law

Answer 10

It states that the pd across an ideal conductor is directly proportional to current thru it, provided temp and other physical conditions remain constant

Question 11

Procedure to determine ressitance of metallic conductor

Answer 11

1. Set up a circuit with rheostat
2. Adjust rheostate to max resistant so a small current flow thur circuit initially for saftey precaution
3. Record I and V
   4> Adjust rheostat to allow a larger current to flow in the circuit. Record I and V again
4. Repeat step 4 for at least 6 sets of i and v readings
   6 Plot a graph of V against I
5. Find gradient