Question

An electric appliance produces 120000 J heat energy in one minute. find its power​

Answer 1

Answer:

2 KW

Explanation:

As per the provided information in the given question, we have :

• Work done (W) = 120000 J
• Time taken (t) = 1 minute

We are asked to calculate its power.

In order to calculate its power, firstly we need to convert time into its SI unit.

$\longrightarrow\tt {t = 1 \; minute }$

$\longrightarrow\tt {t = 60 \; seconds }$

Now, as we know that,

$\longrightarrow \boxed{\tt {P = \dfrac{W}{t} }}$

• P denotes power
• W denotes work done
• t denotes time

$\longrightarrow\tt {P= \cancel{ \dfrac{120000}{60} } \; watt}$

$\longrightarrow\tt {P= 2000 \; W }$

Or,

$\longrightarrow \underline{\boxed{\tt {P= 2 \; KW }}} \; \bigstar$

Therefore, its power is 2 kilowatts.

$\underline{ \qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad}$

Explore More!!

• Electric power is defined as electric work done per unit time.
• SI unit of power is watt (W).

1. $\boxed{\tt {P= \dfrac{W}{t} }}$
2. $\boxed{\tt {P= V \times I }}$
3. $\boxed{\tt {P= \dfrac{V^2}{R} }}$
4. $\boxed{\tt {P= I^2R}}$

Where,

• P denotes power
• V denotes voltage or potential difference
• I denotes current
• R denotes resistance
• t denotes time