Out of the two wires $X$ and $Y$ shown below which one has greater resistance. Justify your answer.
Out of the two wires $X$ and $Y$ shown below which one has greater resistance. Justify your answer.
Wire $Y$ has greater resistance because resistance is directly proportional to the length of the conductor.
Similar Questions
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.
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.
The rating of an electric heater is $1100\, W , 220\, V$. Calculate its resistance when it operates at $220\, V$. Also, calculate the energy consumed in $k W h$ in the month of November, if the heater is used daily for four hours at the rated voltage.
The rating of an electric heater is $1100\, W , 220\, V$. Calculate its resistance when it operates at $220\, V$. Also, calculate the energy consumed in $k W h$ in the month of November, if the heater is used daily for four hours at the rated voltage.
What is a voltmeter ? How is it connected in a circuit ?
What is a voltmeter ? How is it connected in a circuit ?
How can we measure the current in a circuit ?
How can we measure the current in a 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.
$(a)$ 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.