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 4 hour \(=\) \(J\).

Did you find an error?

16. Numerical problems III