plumbing science Flashcards
1
Q
the units for voltage
A
V
2
Q
the units for current
A
i
3
Q
units for resistance
A
R
4
Q
what’s watt the measure of
A
power
5
Q
what’s the equation for ohms law
A
current x voltage x resistance
6
Q
what is the symbol for DC
A
2 lines one dotted
7
Q
how to work out resistance
A
voltage/current
8
Q
how to work out voltage
A
current x resitance
9
Q
What would be the resistance of a domestic appliance
if the fuse size was 3 amp?
A
80 ohms.
10
Q
What is the fuse size for a domestic appliance which
has 1,200 ohms resistance?
A
0.2 amp.
11
Q
If an appliance had a fuse rated at 13 amp and the
resistance was 32 ohms, what would the voltage be?
A
416v
12
Q
what does AC stand for
A
alternative current
13
Q
what does DC stand for
A
direct current
14
Q
what colour is the earth wire
A
green and yellow
15
Q
where does the alternative current come from
A
the mains electricity
