the unit of frequency is:
hertz
vibration per second
cycle per second
all a, b and c
Human skin, in dry conditions, has a resistance of:
20,000 ohm
100,000 ohm
30,000 ohm
2000 ohm
Which is an example of a longitudinal wave:
Sound wave
Light wave
Radio wave
Water wave
an ideal voltmeter is that which draws:
small current
no current
high current
none of these