Question

The coil is placed in the magnetic field of a horseshoe magnet. The plane of the coil is at right angles to the field. The coil is then removed to a region where B = 0, and using an oscilloscope, the following signal is observed across the ends of the wires of the coil.
Find Φ = ∫ℰdt (magnitude of integral).

The vertical sensitivity is 10 mV/cm and the horizontal sensitivity is 20 ms/cm.

Answer 1

You need to compute the area of this triangle

$$
\cfrac{1}{2}~base\times height
$$

This will be the flux going through the coil and will be negative.

Answer 2

@ybarrap So basically I calculate the dimensions of the triangle.
I found 4.9cm across(base) and 2.8cm down(height) .
Then I applied the conversions "vertical sensitivity is 10 mV/cm and the horizontal sensitivity is 20 ms/cm"
[ since the question asks for it in volt*s] .
Then I calculated the area. Is there something wrong I'm doing ?

Answer 3

You are correct! Apply that conversion and you will end up with volts*s.