Transcript pig-p4-a-d-higher

Pig – P4 (a to d)
Higher
Explain what happens to the cloth
and the rod when they are rubbed
together? (3 marks)
Why is static a danger when a
plane refuels? (2 points)
How is a defibrillator used to restart
the heart (3 points)
How does a paint sprayer use
static electricity, including one
advantage (4 points)
How is the smoke removed from
the chimney smoke (3)
Correctly name the wires and their
job in the plug
Name two uses of ultrasound, other
than body scans? (2 marks)
How does a fuse work? (2)
Which letter shows amplitude and
which letter shows wavelength?
A
D
B
C
How does an ultrasound work?
(3 points)
Which shows a longitudinal wave
and what is an area of rarefaction
in a sound wave?
A
B
How do the earth wire and fuse
combine to stop you getting an
Fuse
electric shock
Live wire
Neutral
wire
Earth wire
If an appliance is double –insulated
it does not need an earth wire why?
How does a variable resistor affect
the current in a circuit?