Will a blower motor work without the resistor?
If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored.
How do you know if a resistor is bad?
Your meter will read it as open circuit (infinite ohms). Or maybe it’s a 0.1 ohm current sensing part. Your meter will read it as a short circuit. If it’s a larger resistor with leads and it looks and smells burnt, assume it’s bad.
What happens if I use the wrong resistor?
The equipment will cease to function in short order either by the resistor itself burning up, or by the heat it generates burning up an adjacent component or possibly the circuit board its mounted on or even foil pattern on the circuit board, or maybe all three.
What happens when a resistor is short circuited?
Shorted Components in a Parallel Circuit A shorted resistor (resistance of 0 Ω) would theoretically draw infinite current from any finite source of voltage (I=E/0). In this case, the zero resistance of R2 decreases the circuit total resistance to zero Ω as well, increasing total current to a value of infinity.
What happens if you use a higher resistor?
The cases where using a higher value resistor will damage a circuit exist, but are a bit less usual than the cases where it may simply produce a weaker result than desired, or a different frequency response than desired.
Is it better to use a higher or lower resistor?
High tolerance means a higher percentage of manufacturing error in the resistance value and low tolerance means a low percentage of error. So clearly lower tolerance means better accuracy.
What happens when you replace a resistor with a wire?
Replacing a resistor with a wire results in more current flowing and more voltage at the input of next component(s). This may cause heating or damage to the next component.
What will happen to the resistance of a resistor if the power gets too large?
When the current becomes larger, the resistive force in the resistor becomes larger and more heat is produced or it may be burnt out. But the voltage and the current are not linearly proportional. Because when the temperature of the resistor rises, its abailty to resist current decreses.
What happens to the current in a circuit when the voltage is doubled?
if you increase the voltage (or electrical pressure) in a circuit then the current (flow of electrons) will increase in direct proportion, eg if you double the voltage the current flow will double.
What is the relationship of current to resistance if voltage is constant?
Conversely, if the voltage is constant then doubling the resistance halves the current. There is a very simple relationship between all three variables as you can see. Using the symbols V for voltage, R for resistance and I for current the formula for Ohm’s Law is: V = R × I.
What happens to resistance when voltage is increased?
In a series circuit the components are connected along a single path. Therefore, if the voltage is increased, the current will increase provided the resistance of the circuit does not change. Similarly, increasing the resistance of the circuit will lower the current flow if the voltage is not changed.
What is the relation between current and resistance?
The relationship between current, voltage and resistance is expressed by Ohm’s Law. This states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, provided the temperature remains constant.