You are qiven three bulbs of $25 \,W , 40\, W$ and $60 \,W$ marked at $220\, V$. Which one of them has lowest resistance ?
You are qiven three bulbs of $25 \,W , 40\, W$ and $60 \,W$ marked at $220\, V$. Which one of them has lowest resistance ?
- A
$60\, W$ bulb
- B
$40\, W$ bulb
- C
$25\, W$ bulb
- D
no conclusion can be drawn
Similar Questions
$(a)$ How much current will an electric bulb draw from a $220\, V$ source, if the resistance of the bulb filament is $1200\,ohm$ ?
$(b)$ How much current will an electric heater coil draw from a $220\, V$ source, if the resistance of the heater coil is $100\, ohm$ ?
$(a)$ How much current will an electric bulb draw from a $220\, V$ source, if the resistance of the bulb filament is $1200\,ohm$ ?
$(b)$ How much current will an electric heater coil draw from a $220\, V$ source, if the resistance of the heater coil is $100\, ohm$ ?
How much work is to be done in moving a charge of $2 \,C$ through electric potential difference of $6\, V$ ?
How much work is to be done in moving a charge of $2 \,C$ through electric potential difference of $6\, V$ ?
A thick wire and a thin wire of the same material are successively connected to the same circuit to find their respective resistance. Which one will have lower resistance ? Give reason.
A thick wire and a thin wire of the same material are successively connected to the same circuit to find their respective resistance. Which one will have lower resistance ? Give reason.
What is meant by "electrical resistance" of a conductor ? State how resistance of a conductor is affected when $(i)$ a low current passes through it for a short duration; $(ii)$ a heavy current passes through it for about $30$ seconds.
What is meant by "electrical resistance" of a conductor ? State how resistance of a conductor is affected when $(i)$ a low current passes through it for a short duration; $(ii)$ a heavy current passes through it for about $30$ seconds.
$(a)$ Define the term 'volt'.
$(b)$ State the relation between work, charge and potential difference for an electric circuit. Calculate the potential difference between the two terminals of a battery, if $100$ joules of work is required to transfer $20$ coulombs of charge from one terminal of the battery to the other.
$(a)$ Define the term 'volt'.
$(b)$ State the relation between work, charge and potential difference for an electric circuit. Calculate the potential difference between the two terminals of a battery, if $100$ joules of work is required to transfer $20$ coulombs of charge from one terminal of the battery to the other.