Question

an electric motor of 100w is turned on for 5 min calculate energy consumed in joules by the motor ignore other loses​

Answer 1

Answer:

• 3×10⁴ Joules is the required answer.

Explanation:

Given:-

• Power of Motor ,P = 100 W
• Time taken ,t = 5min = 5×60 = 300 s

To Find:-

• Energy Consumed ,E

Solution:-

As we have to calculate the energy consumed by electric motor .

Energy Consumed is calculated by the product of power of appliance & time taken .

• E = P×t

where,

• E denote Energy Consumed
• P denote Power of Motor
• t denote time taken.

Substitute the value we get

→ E = 100 × 300

→ E = 30000 J

→ E = 3 × 10⁴ J

• Hence, the energy consumed by the Electric motor is 3×10⁴ Joules.

Answer 2

Given,

Power = 100 W

Time for which electric motor is used = 5 min

= 5 × 60 = 300 seconds

To Find, Energy consumed in joules ( J ).

As we know,

Power = Energy / Time

$= > 100 = \frac{energy}{300} \\ = > energy = 100 \times 300 \\ = >energy = 30000j$

Thus, energy consumed by the electric motor of 100 watt in 5 minutes is 30,000 Joules.