The filament of electric bulb is made of tungsten Why ?
The filament of electric bulb is made of tungsten Why ?
Because it has a high melting point and does not easily react with air.
Similar Questions
An electric heater rated $1200\, W$ operates $2$ hour per day. Find the cost of the energy required to operate it for $30$ days at ₹ $5.00$ per unit.
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$(a)$ How is the direction of electric current related to the direction of flow of electrons in a wire ?
$(b)$ Calculate the current in a circuit, if $500 \,C$ of charge passes through it in $10$ minutes.
$(a)$ How is the direction of electric current related to the direction of flow of electrons in a wire ?
$(b)$ Calculate the current in a circuit, if $500 \,C$ of charge passes through it in $10$ minutes.
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Define resistance of a conductor. State the factors on which resistance of a conductor depends. Name the device which is often used to change the resistance without changing the voltage source in an electric circuit.
Calculate the resistance of $50 \,m$ length of wire of cross $-$ sectional area $0.01$ square $m m$ and of resistivity $5 \times 10^{-8}\, \Omega m$
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A child has drawn the electric circuit to study Ohm’s law as shown in Figure. His teacher told that the circuit diagram needs correction. Study the circuit diagram and redraw it after making all corrections.
A child has drawn the electric circuit to study Ohm’s law as shown in Figure. His teacher told that the circuit diagram needs correction. Study the circuit diagram and redraw it after making all corrections.