Question

An ammeter and voltmeter are used to measure the current through and the potential difference across a bulb, respectively. the ammeter reads 0.52a and the voltmeter reads 12.4v. how much energy is transferred to the bulb when it is switched on for 4 minutes.

Answer 1

Using the formula Energy (E) = Power (P) × Time (t), with the given ammeter reading of 0.52 A and voltmeter reading of 12.4 V, the energy transferred to a bulb in 4 minutes is calculated to be 1547.52 Joules.

Step-by-step explanation:

The question relates to Physics, specifically to electrical circuits involving the use of ammeters and voltmeters for measuring current and voltage, respectively. To find the energy transferred to the bulb that is switched on for 4 minutes, we use the formula:

Energy (E) = Power (P) × Time (t)

First, we calculate the power using the readings from the ammeter and voltmeter:

Power (P) = Voltage (V) × Current (I)

Substituting the given values:

Power (P) = 12.4 V × 0.52 A = 6.448 Watts

Now, to find the energy :

Energy (E) = 6.448 W × 4 min × 60 seconds/min

Energy (E) = 6.448 W × 240 s = 1547.52 Joules

Therefore, the energy transferred to the bulb in 4 minutes is 1547.52 Joules.