Final answer:
To find how many light bulbs can be safely connected in parallel to a 2 A DC power supply, we would need to know the current draw of each bulb. Assuming each bulb draws 0.2 A, up to 10 bulbs can be connected. Exceeding this number can overload the power supply, leading to overheating or failure.
Step-by-step explanation:
Understanding the Maximum Number of Light Bulbs for a Power Supply
To determine the maximum number of light bulbs that can be connected in parallel to DC power supply #1 without exceeding its maximum output current of 2 A, we would need to know the current each light bulb draws.
However, if we assume that each bulb draws 0.2 A (which is a common assumption for small experiment bulbs), then you could connect up to 10 bulbs (10 bulbs × 0.2 A/bulb = 2 A).
If more than 10 light bulbs are connected in parallel, the total current drawn would exceed the maximum output current of the DC power supply, which can lead to the power supply overheating, and potentially failing or becoming a fire hazard.
Voltage, current, and resistance are related through Ohm's law, which states that the current (I) through a resistor is directly proportional to the voltage (V) and inversely proportional to the resistance (R), according to the formula I = V/R.
This relationship also determines electric power (P), which can be calculated using the formula P = VI. If the voltage is increased while resistance remains constant, the current and power will also increase, leading to a greater power dissipation that can potentially damage the light bulb if its maximum power rating is surpassed.