What instrument is used to measure the strength of a magnetic field?

More Questions:

What single initial is used for the real-life director of Britain's M16?

The synodic month stArts with a new what?

What short story begins "$1.87. That was all. And sixty cents of it was in pennies"?

What redbrick complex lies between the Alexander Garden and Red Square?

What Mexican ciudad sits across the Rio Grande from El Paso, Texas?

What optical component is named for the bean whose shape it resembles?

What kind of bird is an eider?

What is Homer Simpson's middle initial?

What famous movie actor got his start playing the first openly gay nationally broadcast TV character, in the late 1970's?

Who was the original choice to play the Terminator in the film by the same name?

Who played the role of John Anderton in the movie "Minority Report"?

General Sherman’s “March to the Sea” ended in what city?

In which decade was the Berlin Wall erected?

What ancient city did Swiss explorer Johann Ludwig Burckhardt introduce to the Western world in 1812?

What is the nickname of The Ganges-Brahmaputra Delta, the largest delta in the world?