P4 New equations yr10 exam

Question 1

What is the equation for current through a resistor in a parallel circuit?

Answer 1

Current, I = Potential difference, V/Component resistance, R

I=V/R

Or
Potential difference, V = Current, I x Resistance, R

I = Amperes(A)
V = Volts (V)
R = Ohms

Question 2

What is the equation for the electric current of a circuit?

Answer 2

Charge flow,Q=Current,I x Time taken,T
Q= I x T
Or 
Current= Charge flow /Time taken
I= Q/T
Or
Time taken= Charge flow/Current
T=Q/I

Q= Couloumbs(C)
I=Amperes(A)
T=Seconds(S)

Question 3

What is the equation for the potential difference across a component?

Answer 3

Potential difference across a component, V = energy transferred, E/ Charge, Q

V = Volts(V)
E = Joules(J)
Q = Coulombs(C)

Question 4

What is the equation for resistance?

Answer 4

Resistance, R = potential difference, V/ Current, I

R = Ohms
V= Volts (V)
I = Amperes (A)