Using A Multimeter to check Ohms (resistance) Resistor Example
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Uploader Comments (Johnnysshop)
All Comments (27)
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i checked my car speaker the same way as vid and i get a differet read every time also seems to not stop increasing read if i leave it on what could cause this to happen thanks
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@Johnnysshop I have 240V supply 60W lamp and 0.25A through it. But when I try to measure the resistance through the lamp I get a reading which is incompatible with the (I)^2 R = Power or the (V)^2 / R = Power.
I have tried to read the inductance and find the reactance from 2 x Pi x frequency x inductance....then use the Z = SQRT ( resistance ^2 + reactance ^2)
But that doesn't give a good answer either. I'm not 100% sure I'm reading the inductance correctly. I'm a novice.
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@Johnnysshop mine has the option but I like the beep I don't need to look at the mm
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@freezzertime Same way, they all have some markings on them.
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How do you measure resistance in a domestic appliance?
uptilwhen 2 weeks ago
@uptilwhen Same way, red probe to the positive, black to the negative.
Johnnysshop 1 week ago
@Johnnysshop what about measuring a current through a lamp, say? Does it matter if the leads are attached to the 'neutral' (black/blue) or the 'live' (red/brown) side of the circuit?
uptilwhen 1 week ago
@uptilwhen Either is fine since there isn't a ground. Basically you could just test the outlet with the lamp scenario. The voltage would be exactly the same as there are no transformers or anything in a lamp to regulate the voltage.
Johnnysshop 1 week ago
thx for the lesson
kent9286 3 months ago
@kent9286 Thanks for watching!
Johnnysshop 3 months ago