Question

aapke ghar mein Vidyut katauti ke dauran avashyak Vidyut aapurti ke liye 12 volt 150 empier Ghanta ki ek battery Lagai Gai yadi Vidyut katauti ke dauran office Guntur aaveshit battery se ek Sath Vodka Pankha AVN Ek 40 wat ka bulb Ka prayog Mein late Hain To yah kab tak Karya Karega ​

Answer 1

Jamar's Gharat me viduat katuati nahi hoti hai

Answer 2

Given :

Voltage of battery V = 12 v

Current I = 150 A

(per hour)

Power of battery P = 40 watt.

To find :

Time of discharge of battery.

Solution :

It is given that Voltage given by battery is 12 v

and Current through the circuit will be 150 ampere in 1 hour.

It means in presence of 12 v of potential difference by the battery,

The circuit will consume 150 ampere of current per hour.

Power is the measure to quantify the work done in a circuit per hourhour or also we can say that,

Power is the rate by which energy is transferred.

so,

Energy = Power multiplied by time of use lf battery

so

$power \: = \frac{energy}{time}$

we know that

Energy in an electric circuit is :

$E = V \times I \times t$

where

V = voltage,

I = Current

t = Time.

so

Power in a circuit is P :

$P = \frac{V \times I \times t}{t} = VI \:$

So,

In one hour this given circuit will need power :

$P \: = 12 \times 150 = 1800 \: watt$

So

It means this circuit needs 1800 watts to work for 1 hour, but we have only 20 watts

so

Time of working of circuit :

$\frac{20}{1800} hour = \frac{20}{1800} \times 3600 \: seconds \: = 40secons$

So time of working = 40 seconds.