Question

the voltage supplied to a water heater bis 220v and current is 5a if a man wants to have hot water of 2.2 kj then how long he has to wait?​

Answer 1

Answer:

2 seconds

Explanation:

Given :

• Voltage supplied (or) the potential difference = 220 volts

• Current across the water heater = 5 Amperes

• Heat of the water = h = 2.2kj = 2200 joules

To find :

• Time for which the man has to wait

Using heat formula :

H=V×I×T

2200 = 220×5×T

2200 = 1100×T

T = 2200/1100

T = 2 seconds

He has to wait for 2 seconds for getting the desired amount of heat

Answer 2

Answer:

Given:

• The voltage supplied to a water heater bis 220v and current is 5a if a man wants to have hot water of 2.2 kj.

Find:

• Find the time that how long he has to wait?

Know terms:

1. Heat = (H)
2. Volts = (V)
3. Current = (I)
4. Time = (t)

Using formula:

★ ${\sf{\underline{\boxed{\orange{\sf{H = V \times I \times t}}}}}}$

Calculations:

⇒ $\bold{2200 = 220 \times 5 \times t}$

⇒ $\bold{2200 = 1100 \times t}$

⇒ $\bold{t = \cancel{\dfrac{2200}{1100}}}$

⇒ ${\sf{\underline{\boxed{\red{\sf{t = 2 \: sec}}}}}}$

Therefore, 2 seconds he have to wait.