$(a)$ 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 $100\, ohm$ ?
$(a)$ Given $\quad V=220 V , R =1200 \Omega, I =?$
Using the expression $V = IR ,$ we have
$I=220 V / 1200 \Omega=0.18 A$
$(b)$ Given $\quad V=220 V , R =100 \Omega$
From expression $V = IR$, we have
$I=220 V / 100 \Omega=2.2 A$
Similar Questions
In the circuit shown below, calculate
$(a)$ total resistance in arm $CE,$
$(b)$ total current drawn from the battery, and
$(c)$ current in each arm, i.e., $A B$ and $C E$ of the circuit.
In the circuit shown below, calculate
$(a)$ total resistance in arm $CE,$
$(b)$ total current drawn from the battery, and
$(c)$ current in each arm, i.e., $A B$ and $C E$ of the circuit.
$1\, kW h =3.6 \times 10^{6}$ joule.
$1\, kW h =3.6 \times 10^{6}$ joule.
$(a)$ Name an instrument that measures potential difference between two points in a circuit. Define the unit of potential difference in terms of SI unit of charge and work. Draw the circuit symbols for $(i)$ variable resistor, $(ii)$ a plug key which is closed one.
$(b)$ Two electric circuits $I$ and $II$ are shown below
$(i)$ Which of the two circuits has more resistance ?
$(ii)$ Through which circuit more current passes ?
$(iii)$ In which circuit, the potential difference across each resistor is equal ?
$(iv)$ If $R_{1}>R_{2}>R_{3}$, in which circuit more heat will be produced in $R_{1}$ as compared to other two resistors ?
$(a)$ Name an instrument that measures potential difference between two points in a circuit. Define the unit of potential difference in terms of SI unit of charge and work. Draw the circuit symbols for $(i)$ variable resistor, $(ii)$ a plug key which is closed one.
$(b)$ Two electric circuits $I$ and $II$ are shown below
$(i)$ Which of the two circuits has more resistance ?
$(ii)$ Through which circuit more current passes ?
$(iii)$ In which circuit, the potential difference across each resistor is equal ?
$(iv)$ If $R_{1}>R_{2}>R_{3}$, in which circuit more heat will be produced in $R_{1}$ as compared to other two resistors ?
Two electric bulbs $A$ and $B$ are marked $220\, V, 60 \,W$ and $220\, V , 100\, W$ respectively. Which one of the two has greater resistance ?
Two electric bulbs $A$ and $B$ are marked $220\, V, 60 \,W$ and $220\, V , 100\, W$ respectively. Which one of the two has greater resistance ?
Given below is a circuit showing current flowing in it. Identify each component $A, B, C, D$ of this circuit.
Given below is a circuit showing current flowing in it. Identify each component $A, B, C, D$ of this circuit.