Question

a bulb is rated at 200v voltage and power is 100 watt what is the resistance five such bulbs are there and time is 4 hours what is the heat produced and find the cost if the rate of heat per unit is 4.6 0 rupees

Answer 1

Answer:

Step-by-step explanation:

Using, P = V 2/ R

we get R = V2/ P

= (200)2/ 100

= 400  

Energy consumed = P x t

= 100 x 4

= 400 Wh

= 0.4kWh

Cost at the rate of 4.6 rupees per unit = Rs 4.6 x 0.4

= rs. 18.4  

Answer 2

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$<b><big>QUESTION:-</b></big>$

a bulb is rated at 200v voltage and power is 100 watt what is the resistance five such bulbs are there and time is 4 hours what is the heat produced and find the cost if the rate of heat per unit is 4.6 0 rupees



$<b><big>Answer:-</b></big>$


Now,

$p \: = \: \frac{v2}{ \: r}$

$we \: get \: \: r = \: \frac{v2}{ \: p}$

$= (200) \frac{2}{100}$

= 400

Energy consumed = p × t

= 100 × 4

=> 400 wh

=> 0.4k wh

cost at the rate of 4.6 rupees per unit =

Rs 4.6 × 0.4

= Rs 18.4

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