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Question
Statement 1: It is observed that sometimes an incandescent bulb glows brighter and sometimes it glows dim.
Statement 2: Glowing brighter and dimmer depends on heating effect of current. More current produces more heating effect making the bulb glow brighter and vice-versa.
Statement 1: It is observed that sometimes an incandescent bulb glows brighter and sometimes it glows dim.
Statement 2: Glowing brighter and dimmer depends on heating effect of current. More current produces more heating effect making the bulb glow brighter and vice-versa.
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Solution
The correct option is A Both the statements are true and statement 2 is the correct explanation of statement 1.
More current produces more heating effect and hence the filament heats up more and it glows brighter but it glows dimmer when less current flows through the wire.
Both the statements are true and statement 2 is the correct explanation of statement 1.
More current produces more heating effect and hence the filament heats up more and it glows brighter but it glows dimmer when less current flows through the wire.
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