Here are 10 one-word answer type questions from the topic Heating Effect of Electric Current along with their answers and explanations:
Topic: Heating Effect of Electric Current
When an electric current passes through a conductor, it produces heat. This effect is known as the heating effect of electric current. This principle is used in many devices like electric bulbs, heaters, fuses, and irons.
1. Question: What effect is observed when an electric current passes through a wire?
Answer: Heating
Explanation: When current passes through a wire, the wire becomes hot. This is called the heating effect of electric current.
2. Question: What is the thin wire inside an electric bulb called?
Answer: Filament
Explanation: The filament is a thin wire inside the bulb that glows when heated by electric current.
3. Question: Which material is commonly used as the filament in an electric bulb?
Answer: Tungsten
Explanation: Tungsten is used as filament because it has a high melting point.
4. Question: What device melts and breaks the circuit when excessive current flows?
Answer: Fuse
Explanation: A fuse is a safety device that melts when too much current flows, breaking the circuit.
5. Question: Which type of wire is used in a fuse?
Answer: Low melting
Explanation: Fuse wires are made of materials with low melting points so they melt quickly when current exceeds the limit.
6. Question: What is the coil of wire in appliances like heaters and irons called?
Answer: Element
Explanation: An element is a coil of wire in electrical appliances that becomes hot when current passes through it.
7. Question: What is produced along with light in an incandescent electric bulb?
Answer: Heat
Explanation: An incandescent bulb produces heat along with light, which results in wastage of electricity.
8. Question: Name one appliance where the heating effect of electric current is used.
Answer: Iron
Explanation: In an electric iron, the heating effect of electric current is used to press clothes.
9. Question: What mark is given to electricity-efficient appliances by Bureau of Indian Standards?
Answer: ISI
Explanation: ISI mark is given to certified and electricity-efficient appliances.
10. Question: Which modern lighting device is more electricity-efficient than filament bulbs?
Answer: LED
Explanation: LED bulbs use less electricity and produce very little heat compared to filament bulbs.
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