More Flashcards
1
Q
power =
A
current × voltage
2
Q
How is the relationship between power, current, and voltage used to select appropriate fuses?
A
The power rating of an appliance is calculated using the formula P = I × V. By knowing the appliance’s operating voltage and maximum power, the appropriate fuse is selected to handle slightly above the calculated current without prematurely breaking the circuit.
3
Q
energy transferred =
A
current × voltage × time
4
Q
where does DC come from
A
A cell
one direction
5
Q
where does AC come from
A
the mains
current changes direction
6
Q
how do u get graphs of ac dc
A
oscilloscope
7
Q
in the uk:
A
50 Hz
230v
230v to -230v
50 times a second
8
Q
LABEL A STANDRAD UK PLUG
A
LABEL A STANDRAD UK PLUG
9
Q
1 KWh =
A
3,600,000J
used for domestic and industrail uses
