ebn122_st1_2016_v2.pdf

# The current exiting the positive terminal of the

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A 5V battery is connected in series with an element. The current exiting the positive terminal of the battery decreases linearly from 20 mA to 5 mA between t = 0 s and t = 20 s, while the voltage remains constant. What is the energy associated with the battery? Vraag 1.2 [2] ‘n 5 V battery word in serie met ‘n element gekoppel. Die stroom wat by die positiewe terminal van die battery uitvloei val liniêer van 20mA tot 5 mA tussen t = 0 s en t = 20 s. Wat is die energie geassosieer met die battery? Question 1.1 [2] The kitchen light in a household is used for 8 hours every day per year (365 days). If the lightbulb was a 100 W candescent lightbulb, what is the savings over a one year period if the lightbulb is replaced with a 20 W LED light? Assume electricity costs R1.50 per kWh. Vraag 1.1 [2] ‘n Gloeilamp in ‘n kombuis word vir 8 ure elke dag van die jaar (365 dae) gebruik. Indien die gloeilamp met ‘n gradering van 100 W vervang word met ‘n LED lamp van 20 W, wat is die besparing oor ‘n een jaar periode? Aanvaar elektrisiteit kos R1.50 per kWh.

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