why do we not use a bulb in place of resistance
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because it increase the resistance.
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Condition 1. Resistance low(constant) and increases the current in bulb filaments.
Size of bulb, material cost and current caring- conductor wire width increases to drive the high current.
High melting point (3695 K), low vapor pressure, and greatest tensile also required.
Condition 2. Voltage, Current both are constant with high resistance filament wire.
Size of bulb, material costs and current caring conductor wire width get decreases.
Most of time we are using tungsten wire inside the bulb, offers high resistance through which an electric current is passed.
Pure tungsten has some amazing properties including the highest melting point (3695 K), lowest vapor pressure, and greatest tensile strength out of all the metals.Because of these properties it is the most commonly used material for light bulb filaments.
Conclusion:
Means, if we try to increase current instead of resistance we have need to design the circuit which can drive high current (required more conductor, price increases because of more conductor and size also get increases). That why we are focus on how to increase the resistance to obtain more heat.
Size of bulb, material cost and current caring- conductor wire width increases to drive the high current.
High melting point (3695 K), low vapor pressure, and greatest tensile also required.
Condition 2. Voltage, Current both are constant with high resistance filament wire.
Size of bulb, material costs and current caring conductor wire width get decreases.
Most of time we are using tungsten wire inside the bulb, offers high resistance through which an electric current is passed.
Pure tungsten has some amazing properties including the highest melting point (3695 K), lowest vapor pressure, and greatest tensile strength out of all the metals.Because of these properties it is the most commonly used material for light bulb filaments.
Conclusion:
Means, if we try to increase current instead of resistance we have need to design the circuit which can drive high current (required more conductor, price increases because of more conductor and size also get increases). That why we are focus on how to increase the resistance to obtain more heat.
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