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1. True or false: A 60-Watt light bulb would consume 30Joules of electrical energy in 2 seconds.2. A resistance of 25 ohms is connected to a 12 V battery.Calculate ...

Question

1. True or false: A 60-Watt light bulb would consume 30Joules of electrical energy in 2 seconds.2. A resistance of 25 ohms is connected to a 12 V battery.Calculate the heat energy in joules generated per minute.3. An electric iron of resistance 20 ohm draws a current of5.00 amperes. Calculate the power generated4. An unknown resistor has a 5 mA current flowing throughit when 10 volts are applied to it. For the same resistor, theapplication of 20 volts will result in the current flow of:

1. True or false: A 60-Watt light bulb would consume 30 Joules of electrical energy in 2 seconds. 2. A resistance of 25 ohms is connected to a 12 V battery. Calculate the heat energy in joules generated per minute. 3. An electric iron of resistance 20 ohm draws a current of 5.00 amperes. Calculate the power generated 4. An unknown resistor has a 5 mA current flowing through it when 10 volts are applied to it. For the same resistor, the application of 20 volts will result in the current flow of:



Answers

Total Energy A 100-watt (W) light bulb has resistance $R=$ 144 ohms $(\Omega)$ when attached to household current, where the voltage varies as $V=V_{0} \sin (2 \pi f t)\left(V_{0}=110 \mathrm{~V}, f=60 \mathrm{~Hz}\right) .$ The energy (in joules) expended by the bulb over a period of $T$ seconds is $$ U=\int_{0}^{T} P(t) d t $$ where $P=V^{2} / R(\mathrm{~J} / \mathrm{s})$ is the power. Compute $U$ if the bulb remains on for 5 hours.

So here we have B could do the square off, huh? On the vehicle. Just visit. Also visit with your 110 Cy. I'm going to buy ethical to the 60 d and everything. He will be square leave Amber are getting 1 44 so it can be simplified by Ah, 110 square Cy Square off No. 110 deep by D dividing by 1 44 And now we want to do that. You with within finals. You Could you the into question from zero to? It didn't 1000 on beauty. We could, you know. Ah, hunger on 10 square. I want that 1 24 Cy Square one can t by d did they so the guard isn't echoed. You, uh you go, jewel completing the 110 square one 24 I'm assigned and in some God is Ah, you're 18,000 when Cy Square under 120 I d neatly. So to make it easier when wouldn't, uh, knitted you echo to 120 party. So d'you incumbent you on an urgent to buy do they so ah, and then disintegrate into this integral Campbell written is 110 square, November 1 for too far. And rickon chance the women here as well when take a job in England is Oh, went the equity 18,000. Where temps with uh huh. And 18,000 terms with the 120. I'm gonna to 160123 Bye. Okay. And then we have this. Ah, square under you on, do you? Hey, we divine by So we terms with the 120 by here. And him we can use the Noah. They can use the number and go to prison. 110 square event in by 1 44 times 1 20 by and with terms in under two. Yeah, and we have integration from their 2 to 1 sick wanting g for by and instead of a gun the one minus go side to you, Do you? So once again, the answer we go do 110 square be riding by 1 24 times You wanna confronted by Well we have hand would be And you know enough Cy to you given with two on the limit goes from 0 to 21 61234 by so every computers on which again the and say, Well, you could you so even find 16 friends? Oh, 756250 Sure.

Here it is even in the problem that already in power of the light bulb is 60. Word and operated world is of the light bulb is 1 20 world. And in the foster Bardo, this problem you want to call, call it resistance off the light bulb. Not by using their religion that are equal to Secare. A wall dish upon four were here all dishes 12 in the world and bore off. The light bulb is six toward so we have our equal to 1 20 1 14 This is not a distance off a light bulb off our 60 ward. No, the second part again by using the relation that p equal to so good ovary a bomb are a constant. A predator will dish we d'oh for is inversely proportional under your sense every hill, a light bulb off 100 words Then it will less reticence ISS compared to lightbulb off 60 war from the relation it is clear there reasons and Barbara are in worse city proportion. No, by putting the values here in the elation p equal to disappear upon our are we have are equal to recent get a bomb. P were operated wall dishes. 1 20 World and power of the Liable in this case is under war. So we have reasons off underworld libels equal to one foot before. Oh, so this is the but in a sense off 100 word label of. And this is an instance off 60 word Leiber. By seeing these two values, it is clear there a sense off 60 word lightbulb is greater than resistance off under work, lad Buck.

High in the given problem. Power of the belt is given as P. Is equal to see what and the voltage applied across it, at which it is to be operated. It's given us 120 world. No, in the first part of the problem, using the relation for the power B is equal to be square by our The expression for the resistance will come out to be R is equal to be square by P. Hence it comes out to be hunted to the whole square divided by 60. So the resistance of this bill here comes out to be 240. Oh, answer for the first part of the problem. Not in the second part of the problem, using again, the expression for the power is equal to the square by our The power depends inversely on the resistance. So four 100 what build as the power is more So the resistance maybe less resistance of its element will be list then That of a 60 watt bulb. And this is the answer for the second part of this problem. Thank you.

In circuit one. The balls are connected in ST so equivalent resistance are equivalent is equal to R plus R. Equal to R. And current I is equal to E. By our equivalent is equal to E. By to uh Is the F. Does the current flowing is equal to E by our through the circuit one. Now we all know that power delivered is equal to ice square. Are so just putting the value here so I can write E by two. Uh Holy square multiplication are on simplifying it further I can like devalue a even edge is square by. For uh So rearranging the expression, I can write E square by R. Is equal to four. P. One. Now for circuit two for Circuit two I can write The value of one by our equivalent death is equal to one by our plus one by our so our equivalent death is equal to our by two. Also I can like P two is equal to is where by our equivalent death. So Just putting the value here, I can like P two is equal to He square by our by two, which is equal to E square by God. So I can write B. Two is equal to two multiplication four P. One, which is equal to eight P. One. So just putting the value here Up, even so I can write eight multiplication five words, which is equal to 40 watt. So this is the power delivered by each bulb in the circuit.


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