Resistivity of two elements $A$ and $B$ are $1.62 \times 10^{-8}\, \Omega m$ and $520 \times 10^{-8}\, \Omega m$ respectively. Out of these two, name the element that can be used to make
$(i)$ filament of electric bulb.
$(ii)$ wires for electrical transmission lines. Justify your answer in each case.
Resistivity of two elements $A$ and $B$ are $1.62 \times 10^{-8}\, \Omega m$ and $520 \times 10^{-8}\, \Omega m$ respectively. Out of these two, name the element that can be used to make
$(i)$ filament of electric bulb.
$(ii)$ wires for electrical transmission lines. Justify your answer in each case.
$(i)$ Element $B$ : It has more resistivity $\left(520 \times 10^{-8} \Omega m \right)$
$(ii)$ Element $A$ : It has less resistivity and hence less heating effect/dissipation of energy during transmission of power.
Similar Questions
State Ohm's law.
State Ohm's law.
$(a)$ What do the following symbols represent in a circuit ? Write the name and one function of each.
$(b)$ Draw a schematic diagram of a circuit consisting of a battery of $12 V$, three resistors of $5\, \Omega, 10\, \Omega$ and $20\, \Omega$ connected in parallel, an ammeter to measure the total current through the circuit, $a$ voltmeter to measure the potential difference across the combination of resistors.
$(c)$ State any one advantage of connecting electrical devices in parallel with the mains instead of connecting them in series in a household circuit.
$(a)$ What do the following symbols represent in a circuit ? Write the name and one function of each.
$(b)$ Draw a schematic diagram of a circuit consisting of a battery of $12 V$, three resistors of $5\, \Omega, 10\, \Omega$ and $20\, \Omega$ connected in parallel, an ammeter to measure the total current through the circuit, $a$ voltmeter to measure the potential difference across the combination of resistors.
$(c)$ State any one advantage of connecting electrical devices in parallel with the mains instead of connecting them in series in a household circuit.
State the formula co$-$relating the electric current flowing in a conductor and the voltage applied across it. Also, show this relationship by drawing a graph. What would be the resistance of a conductor, if the current flowing through it is $0.35$ ampere when the potential difference across it is $1.4$ volt ?
State the formula co$-$relating the electric current flowing in a conductor and the voltage applied across it. Also, show this relationship by drawing a graph. What would be the resistance of a conductor, if the current flowing through it is $0.35$ ampere when the potential difference across it is $1.4$ volt ?
Draw a schematic diagram of a circuit consisting of a cell of $1.5 \,V , 10 \Omega$ resistor and $15 \,\Omega$ resistor and $a$ plug key all connected in series.
Draw a schematic diagram of a circuit consisting of a cell of $1.5 \,V , 10 \Omega$ resistor and $15 \,\Omega$ resistor and $a$ plug key all connected in series.
In an experimental set$-$up as shown below, a piece of silver was placed touching points $A$ and $B .$ Next time it was replaced by a piece of wood. In which case did the bulb glow ? Give reason to justify the observation.
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