Current–Voltage Characteristics
1. This question has 3 part(s).
1.1. Figure 1 shows the variation in the current flowing through a filament lamp after it has been switched on.
Figure 1
Use Figure 1 to explain the variation of current flowing through the filament lamp after it has been switched on.
1.2. On Figure 1, draw the variation of current with time if the filament lamp had been stored at a colder temperature before being switched on.
1.3. Given that the filament lamp is 15% efficient, calculate the amount of light energy produced when the lamp is switched on for 30 minutes after being connected to a 12.0 V d.c supply.
You can assume that the time taken to reach the normal operating temperature is negligible compared to the time the lamp is switched on for.
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