Question 3
F72%Figure shows a circuit built by a student.
Figure: Circuit containing a cell, a closed switch, two fixed resistors and an ammeter
a.[1]
Give the name of the arrangement in which resistors R1 and R2 are connected.
b.[1]
R1 has a resistance of 5.0 Ω and R2 has a resistance of 7.0 Ω. Calculate the total resistance of the two resistors.
c.[1]
The ammeter reads 0.50 A. Write down the current in R1 and the current in R2.
d.[2]
Calculate the potential difference of the cell. Use the equation: potential difference=current×resistance\text{potential difference} = \text{current} \times \text{resistance}potential difference=current×resistance