Numerical problems III — task. Science State Board, Class 10.

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A torch bulb is rated at 3 $V$ and 600 $mA$ . Calculate,

(a) Power
(b) Resistance
(c) Energy consumed if it is used for 4 hour.

[Note: Calculate the time in the hour unit and enter the answers up to two decimal places by rounding off the third decimal value].

On converting

$mA$ to

$A$ , we get

$A$ .

(a) The formula for power is

$i = i \times i$

On substituting the given values, we get

$W$ .

(b) From the Ohm's law,

$i = i \times i$ , the formula for resistance can be found.

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

On substituting the given values, we get the resistance as

$\Omega$ .

(c) The formula for electrical energy is

$i = i \times i$

Energy consumed if it is used for hour $=$ $J$ .

$1$

Did you find an error?

16. Numerical problems III