State true or false.
Tungsten is used almost exclusively for filament of incandescent lamps because tungsten has a high melting point ( $3380^{\circ}$ C) and becomes incandescent (i.e., emits light at a high temperature) at $2400 K$ .

True

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False

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Solution

The correct option is A True
Tungsten has a high melting point ( $3380^{\circ}$ C) and becomes incandescent (i.e., emits light at a high temperature) at $2400 K$ . Because of very high melting point tungsten doesn't melt. That's why in bulb or lamps we use tungsten filament.

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Tungsten is used almost exclusively for filament of incandescent lamps because tungsten has a high melting point ( $3380^{\circ}$ C) and becomes incandescent (i.e., emits light at a high temperature) at 2400 K.

Tungsten do not oxidize at high temperature. Can it be the reason for tungsten used almost exclusively for filament of electric lamps?

Q. Why is tungsten metal selected for making filaments of incandescent lamp bulbs?

Q. An incandescent bulb has a thin filament of tungsten that is heated to high temperature by passing an electric current. The hot filament emits black-body radiation. The filament is observed to break up at random locations after a sufficiently long time of operation due to non-uniform evaporation of tungsten from the filament. If the bulb is powered at constant voltage, which of the following statement(s) is(are) true?

Q. Why is Tungsten used almost exclusively for filament of electrical lamps ?

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State true or false. Tungsten is used almost exclusively for filament of incandescent lamps because tungsten has a high melting point (3380∘C) and becomes incandescent (i.e., emits light at a high temperature) at 2400K.

The correct option is A TrueTungsten has a high melting point (3380∘C) and becomes incandescent (i.e., emits light at a high temperature) at 2400K. Because of very high melting point tungsten doesn't melt. That's why in bulb or lamps we use tungsten filament.

State true or false.
Tungsten is used almost exclusively for filament of incandescent lamps because tungsten has a high melting point ( $3380^{\circ}$ C) and becomes incandescent (i.e., emits light at a high temperature) at $2400 K$ .

The correct option is A True
Tungsten has a high melting point ( $3380^{\circ}$ C) and becomes incandescent (i.e., emits light at a high temperature) at $2400 K$ . Because of very high melting point tungsten doesn't melt. That's why in bulb or lamps we use tungsten filament.