ehild said:The ohmmeter reads the resultant resistance between its terminals. Which lamp does it measure in the first case? So what is the resistance of one lamp? Which lamps are connected in series in the third case?
ehild
ummm in parallel? I am not sureehild said:Sorry, I wanted to ask the first case when S1 is closed. But it is right, the resistance of one lamp is 15 ohm. In the third case, A and B are connected in series, the resistances add up, and the meter measures 30 ohm, which is the resultant of two lamps in series. So lamp B is not faulty.
How are the lamps connected in the fourth case? What is the resistance of C when the resultant is 15 ohm?
ehild
thoradicus said:Ok, so let me get this right
the current passes through A but also passes through C only, because it is faulty so it has 0 resistance, so it was shorted?
A lamp can short circuit due to a variety of reasons, such as faulty wiring, damaged bulbs, or loose connections. However, the most common cause is when the electrical current is disrupted by a break in the circuit, causing it to take a shortcut and create a surge of electricity.
There are a few signs that indicate a short circuit in your lamp. These include flickering or dimming of the light, a burning smell, or the lamp not turning on at all. If you notice any of these signs, it is important to stop using the lamp and have it inspected by a professional.
In most cases, a short-circuited lamp can be repaired. However, the extent of the damage and the cost of repair may vary. It is best to consult a professional electrician or bring the lamp to a repair shop to assess the damage and determine the best course of action.
To prevent your lamp from short-circuiting, make sure to use the appropriate wattage bulbs and avoid overloading the circuit by plugging in too many appliances. It is also important to regularly check the wiring and connections of your lamp to ensure they are in good condition.
A short-circuited lamp can pose a fire hazard if not addressed promptly. The surge of electricity caused by a short circuit can generate heat and potentially start a fire. It is important to address any signs of a short circuit in your lamp to prevent any potential hazards.