Intext example X — task. Science CBSE, Class 10.

PDF chapter test TRY NOW

An electric iron consumes energy at the rate of $840\ W$ when heating is at the maximum rate and $360\ W$ when the heating is at the minimum. The voltage is $220\ V$ . What are the current and the resistance in each case?

[Note: Enter the answer up to two decimal places by rounding off the third decimal value].

The formula for power is

$i = i \times i$

From the above formula, the value of current can be easily calculated.

$i = \frac{i}{i}$

The resistance of the electric iron is calculated using the formula

$R = \frac{i}{i}$

a. When heating is at the maximum rate,

Power,

$P$

$=$

$840\ W$

Voltage,

$V$

$=$

$220\ V$

Current

$=$

$A$

Resistance

$=$

$Ω$

b. When heating is at the minimum rate,

Power,

$P$

$=$

$360\ W$

Voltage,

$V$

$=$

$220\ V$

Current

$=$

$A$

Resistance

$=$

$Ω$

Previous exercise

Exit to the topic

Next exercise

Send feedback

Did you find an error?

Send it to us!

29. Intext example X

Exercise condition: