For testing appliances, the wattage of test lamp should be_____________?
Correct answer: C. high
- A. very low
- B. low
- C. high
- D. any value
Explanation
A high-wattage test lamp has lower resistance and allows substantial current to pass when connected in series with an appliance, permitting a practical test. A low-wattage lamp would restrict the current too much and may give a misleading result.
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