In article , Graham.
writes
On 20/03/2018 20:01, Tim+ wrote:
Graham. wrote:
On Monday, 19 March 2018 17:02:42 UTC, Dave Plowman (News) wrote:
In article ,
whisky-dave wrote:

Which is the best fuse to use (3A, 5A or 13A) with a 1.15kW electric
fire at a potential difference of 240v

If you're talking a plug fuse, the load is irrelevant. As it is
to protect
the flex etc. In other words, a table light with a 20 watt bulb would be
fine with a 13 amp fuse if the cable was rated at 13 amps.

But that wasn't the question was it.
This was a mid-term test, so you would got this question wrong.


Often with examination question, the right answer is the one the
examiner is expecting. I have had that dilema many times.

I hand my grandson a sheet of A4 paper and ask him what shape it is,
he replies it's a rectangle. Wrong.

Gawaaan, Ill bite. What do you call it?

Tim

Presumably, as it does have thickness, it could be termed a cuboid.

Precisely that.
In geometry, a cuboid is a convex polyhedron bounded by six
quadrilateral faces, whose polyhedral graph is the same as that of a
cube. While mathematical literature refers to any such polyhedron as a
cuboid,[1] other sources use "cuboid" to refer to a shape of this type
in which each of the faces is a rectangle (and so each pair of adjacent
faces meets in a right angle); this more restrictive type of cuboid is
also known as a rectangular cuboid, right cuboid, rectangular box,
rectangular hexahedron, right rectangular prism, or rectangular
parallelepiped

{sorry couldn't resist it}

https://en.wikipedia.org/wiki/Cuboid
Who would have thought such a simple question could produce such a
complicated set of answers.
--
bert