What is meant by $1$ ohm resistance ?
What is meant by $1$ ohm resistance ?
The resistance of a conductor is said to be $1$ ohm if under a potential difference of $1$ volt a current of one ampere flows through the conductor.
Similar Questions
$(a)$ 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.
Mention one reason why tungsten is used for making filament of electric lamp.
Mention one reason why tungsten is used for making filament of electric lamp.
An electric kettle consumes $1\, kW$ of electric power when operated at $220\, V$. A fuse wire of what rating (in $A$) must be used for it?
An electric kettle consumes $1\, kW$ of electric power when operated at $220\, V$. A fuse wire of what rating (in $A$) must be used for it?
If you connect three resistors having values $2\, ohm , 3\, ohm$ and $5\, ohm$ in parallel, will the value of total resistance be less than $2\, ohm$ or greater than 5 ohm or lie between $2\, ohm$ and $5, ohm$ ? Explain.
If you connect three resistors having values $2\, ohm , 3\, ohm$ and $5\, ohm$ in parallel, will the value of total resistance be less than $2\, ohm$ or greater than 5 ohm or lie between $2\, ohm$ and $5, ohm$ ? Explain.
Insulator like wood and rubber has a very low electrical resistance.
Insulator like wood and rubber has a very low electrical resistance.