An electric bulb of 500   W at 100   V is used in a circuit having a 200   V supply. Calculate the resistance R to be connected in series with the bulb so that the power delivered by the bulb is 500   W .

Question

An electric bulb of 500 &#160; W at 100 &#160; V is used in a circuit having a 200 &#160; V supply. Calculate the resistance R to be connected in series with the bulb so that the power delivered by the bulb is 500 &#160; W .

Aicharya · Accepted Answer

Resistance of bulb P = V 2 r r = ( 100 ) 2 500 = 100 &#215; 100 500 = 20 i = P V = 500 100 = 5 &#160; A &#916; V in resistance R = 100 &#160; V R = 100 5 = 20 &#160; &#937;

An electric bulb of 500   W at 100   V is used in a circuit having a 200   V supply.…

Solution

An electric bulb of 500 &#160; W at 100 &#160; V is used in a circuit having a 200 &#160; V supply.…

Solution

An electric bulb of 500 W at 100 V is used in a circuit having a 200 V supply.…