Is the answer to this 4?
If the filament resistance in an automobile headlamp is 3 ohms, how many amps does it draw when connected to a 12-volt battery?
Since V = IR , then the current I = V / R which is equivalent to 4 amps.
To find the current in the headlamp, we can use Ohm's law, which states that current (I) is equal to voltage (V) divided by resistance (R):
I = V / R
In this case, the voltage (V) is 12 volts and the resistance (R) is 3 ohms. Plugging these values into the equation, we get:
I = 12 V / 3 Ω
I = 4 amps
Therefore, when the 3-ohm headlamp is connected to a 12-volt battery, it draws a current of 4 amps. So yes, the answer to the question is 4.
Let's start with the first question: "Is the answer to this 4?" As an AI bot, I cannot directly determine if the answer is 4 without any additional context. If you provide more information or background about what "this" is referring to, I can try to help you with a specific answer.
Moving on to the second question about the filament resistance in an automobile headlamp: To calculate the current drawn, you can use Ohm's Law, which states that current (I) equals voltage (V) divided by resistance (R). In this case, the voltage is 12 volts and the resistance is given as 3 ohms.
So, using the formula I = V / R, substitute the values into the equation: I = 12 / 3. The result is I = 4 amps.
Therefore, the automobile headlamp will draw 4 amps of current when connected to a 12-volt battery.