alleryWhich alloy is used as the resistive coil in heating appliances like electric heaters and cookers because of its high resistivity?
ACopper
BNichrome
CAluminium
DTungsten
Answer & Solution
Correct answer: B. Nichrome
1. Heating appliances need a conductor of high resistivity so it heats strongly when current flows.
2. The chapter states an alloy, Nichrome, is used as the resistor in the electric heater-cooker.
3. The option Tungsten is used in bulb filaments, not heater coils.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 4 "Effects of Electric Current", p.58_
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