2 Electricity

A student investigated how the total resistance of identical resistors connected in parallel varied with the number of resistors.

The student repeated each measurement of resistance three times. The table below shows some of the results for 3 resistors in parallel:

Number of resistors	Reading 1 ( $Ω\Omega$ )	Reading 2 ( $Ω\Omega$ )	Reading 3 ( $Ω\Omega$ )	Mean ( $Ω\Omega$ )
3	22.4	22.9	$Y$	22.5

Calculate the value of $Y\,$ in the table.

[2]

2 Electricity

A student investigated how the total resistance of identical resistors connected in parallel varied with the number of resistors.

The student repeated each measurement of resistance three times. The table below shows some of the results for 3 resistors in parallel:

Number of resistors	Reading 1 ( $Ω\Omega$ )	Reading 2 ( $Ω\Omega$ )	Reading 3 ( $Ω\Omega$ )	Mean ( $Ω\Omega$ )
3	22.4	22.9	$Y$	22.5

Calculate the value of $Y\,$ in the table.

[2]

2 Electricity

2 Electricity Questions