A laboratory current balance is used to measure the magnetic force acting on a straight segment of wire of length 8.0 cm carrying a current of 3.5 A. The wire is suspended in a uniform magnetic field at an angle of $30^\circ\,$ to the field lines. The magnetic force on this wire segment is measured to be 7.7 × 10^-2 N.

A student calculates the magnetic flux density $B\,$ from these measurements and records the results in a database.

Which row in the table below shows the correct table heading for $B\,$ and the correct value for $B$ ?

\begin{array}{c|c|c} \hline & \textbf{Table heading for } B & \textbf{Value for } B \\ \hline \textbf{A} & B/\text{Wb} & 0.28 \\ \hline \textbf{B} & B/\text{T} & 0.55 \\ \hline \textbf{C} & B/\text{Wb} & 0.55 \\ \hline \textbf{D} & B/\text{T} & 0.28 \\ \hline \end{array}

A student calculates the magnetic flux density $B\,$ from these measurements and records the results in a database.

Which row in the table below shows the correct table heading for $B\,$ and the correct value for $B$ ?

\begin{array}{c|c|c} \hline & \textbf{Table heading for } B & \textbf{Value for } B \\ \hline \textbf{A} & B/\text{Wb} & 0.28 \\ \hline \textbf{B} & B/\text{T} & 0.55 \\ \hline \textbf{C} & B/\text{Wb} & 0.55 \\ \hline \textbf{D} & B/\text{T} & 0.28 \\ \hline \end{array}

Electromagnetism

Question 16

Markscheme

Electromagnetism

Question 16

Markscheme

Electromagnetism

Question 16

Electromagnetism Questions

Electromagnetism

Question 16

Electromagnetism Questions