Electrical Bulb - Revision history

NRJC: /* Explanation */

2021-06-21T11:09:34Z

‎Explanation

NRJC: /* Explanation */

2021-06-21T11:09:18Z

‎Explanation

NRJC: /* Description */

2021-06-21T11:06:58Z

‎Description

NRJC at 16:54, 22 April 2019

2019-04-22T16:54:26Z

NRJC: /* IV Graph */

2019-02-28T18:15:46Z

‎IV Graph

NRJC: /* IV Graph */

2019-02-28T14:53:53Z

‎IV Graph

NRJC at 14:53, 28 February 2019

2019-02-28T14:53:28Z

NRJC at 11:20, 27 February 2019

2019-02-27T11:20:34Z

NRJC at 11:12, 27 February 2019

2019-02-27T11:12:16Z

NRJC at 11:11, 27 February 2019

2019-02-27T11:11:55Z

@@ Line 68: / Line 68: @@
 ====Explanation====
 * At small [[Potential Difference|potential differences]] there is a small [[Electrical Current|current]] so the [[heating]] effect of the [[Electrical Current|current]] is small and the [[filament]] remains at a low [[temperature]].
-: At large [[Potential Difference|potential differences]] there is a large [[Electrical Current|electrical current]] so the [[heating]] effect of the [[Electrical Current|current]] is large which causes the [[filament]] to be a high [[temperature]].
+* At large [[Potential Difference|potential differences]] there is a large [[Electrical Current|electrical current]] so the [[heating]] effect of the [[Electrical Current|current]] is large which causes the [[filament]] to be a high [[temperature]].
-:: This is caused by [[electron]]s in the [[wire]] [[collide|colliding]] with [[ion]]s in the [[metal]] [[lattice]] causing them to [[vibrate]].
+** This is caused by [[electron]]s in the [[wire]] [[collide|colliding]] with [[ion]]s in the [[metal]] [[lattice]] causing them to [[vibrate]].
-: [[Wire]]s (like the [[filament]]) have a greater [[Electrical Resistance|resistance]] at higher [[temperature]]s, causing the increase in [[Electrical Current|current]] to be reduced.
+* [[Wire]]s (like the [[filament]]) have a greater [[Electrical Resistance|resistance]] at higher [[temperature]]s, causing the increase in [[Electrical Current|current]] to be reduced.
-:: This is because the more the [[ion]]s in the [[metal]] [[lattice]] [[vibrate]] the more likely [[electron]]s are to [[collide]] with them and slow down.
+** This is because the more the [[ion]]s in the [[metal]] [[lattice]] [[vibrate]] the more likely [[electron]]s are to [[collide]] with them and slow down.
 ====Obtaining the IV Graph====

@@ Line 67: / Line 67: @@
 ====Explanation====
-: At small [[Potential Difference|potential differences]] there is a small [[Electrical Current|current]] so the [[heating]] effect of the [[Electrical Current|current]] is small and the [[filament]] remains at a low [[temperature]].
+* At small [[Potential Difference|potential differences]] there is a small [[Electrical Current|current]] so the [[heating]] effect of the [[Electrical Current|current]] is small and the [[filament]] remains at a low [[temperature]].
 : At large [[Potential Difference|potential differences]] there is a large [[Electrical Current|electrical current]] so the [[heating]] effect of the [[Electrical Current|current]] is large which causes the [[filament]] to be a high [[temperature]].
 :: This is caused by [[electron]]s in the [[wire]] [[collide|colliding]] with [[ion]]s in the [[metal]] [[lattice]] causing them to [[vibrate]].

@@ Line 62: / Line 62: @@
 ====Description====
 The [[IV Graph]] for a '''bulb''' shows that:
-*As [[Potential Difference|potential difference]] increases, [[Electrical Current|increases]].
+*As [[Potential Difference|potential difference]] increases, [[Electrical Current|current]] increases.
 *At small [[Potential Difference|potential differences]]] the the relationship between [[Potential Difference|potential difference]] and [[Electrical Current|current]] is [[linear]] (the [[gradient]] is constant).
 *At large [[Potential Difference|potential differences]] the [[gradient]] becomes more shallow as the [[Electrical Resistance|resistance]] of the '''bulb''' increases.

← Older revision		Revision as of 16:54, 22 April 2019
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	#Reverse the connections on the [[battery]] and repeat steps 4 and 5 to find the I-V relationship for negative [[Potential Difference\|potential difference]] and [[Electrical Current\|current]].		#Reverse the connections on the [[battery]] and repeat steps 4 and 5 to find the I-V relationship for negative [[Potential Difference\|potential difference]] and [[Electrical Current\|current]].
	\|}		\|}
		+
		+	==Beyond the Curriculum==
		+	{{#ev:youtube\|https://www.youtube.com/watch?v=oCEKMEeZXug}}

← Older revision		Revision as of 18:15, 28 February 2019
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	: [[Wire]]s (like the [[filament]]) have a greater [[Electrical Resistance\|resistance]] at higher [[temperature]]s, causing the increase in [[Electrical Current\|current]] to be reduced.		: [[Wire]]s (like the [[filament]]) have a greater [[Electrical Resistance\|resistance]] at higher [[temperature]]s, causing the increase in [[Electrical Current\|current]] to be reduced.
	:: This is because the more the [[ion]]s in the [[metal]] [[lattice]] [[vibrate]] the more likely [[electron]]s are to [[collide]] with them and slow down.		:: This is because the more the [[ion]]s in the [[metal]] [[lattice]] [[vibrate]] the more likely [[electron]]s are to [[collide]] with them and slow down.
		+
		+	====Obtaining the IV Graph====
		+	{\| class="wikitable"
		+	\|-
		+	\|[[File:BulbIVGraphCircuit.png\|center\|300px]]
		+	\| style="height:20px; width:300px; text-align:left;" \|
		+	#Connect an [[ammeter]] in [[Series Circuit\|series]] with the '''bulb''' to measure [[Electrical Current\|current]] through the '''bulb'''.
		+	#Connect a [[voltmeter]] in [[Parallel Circuit\|parallel]] with the '''bulb''' to measure the [[Potential Difference\|potential difference]] across it.
		+	#Use a [[Variable Resistor\|variable resistor]] in [[Series Circuit\|series]] with the '''bulb''' to vary the [[Potential Difference\|potential difference]] across the '''bulb'''.
		+	#Start with a [[Potential Difference\|potential difference]] of zero and increase the [[Potential Difference\|potential difference]] by an interval of 1V up to 10V.
		+	#Recording the reading on the [[voltmeter]] and [[ammeter]].
		+	#Reverse the connections on the [[battery]] and repeat steps 4 and 5 to find the I-V relationship for negative [[Potential Difference\|potential difference]] and [[Electrical Current\|current]].
		+	\|}

@@ Line 59: / Line 59: @@
 |-
 |[[File:IVGraphBulb.png|center|400px]]
 |}
 ====Description====

← Older revision		Revision as of 14:53, 28 February 2019
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	: In a [[Filament Bulb\|filament]] '''bulb''' [[Electrical Work\|electrical work]] is done to [[heat]] the filament to a high enough [[temperature]] that it glows in [[Visible Light\|visible light]], see [[Black Body Radiation\|black body radiation]].		: In a [[Filament Bulb\|filament]] '''bulb''' [[Electrical Work\|electrical work]] is done to [[heat]] the filament to a high enough [[temperature]] that it glows in [[Visible Light\|visible light]], see [[Black Body Radiation\|black body radiation]].
	: The [[Electrical Current\|electrical current]] has a [[heating]] effect on the filament which increases its [[temperature]]. This causes the [[Electrical Resistance\|resistance]] to increase, so the '''bulb''' does not behave as an [[Ohmic Conductor\|ohmic conductor]].		: The [[Electrical Current\|electrical current]] has a [[heating]] effect on the filament which increases its [[temperature]]. This causes the [[Electrical Resistance\|resistance]] to increase, so the '''bulb''' does not behave as an [[Ohmic Conductor\|ohmic conductor]].
		+
		+	===IV Graph===
		+	{\| class="wikitable"
		+	\|-
		+	\|[[File:IVGraphBulb.png\|center\|400px]]
		+	\|-
		+	\| style="height:20px; width:200px; text-align:center;" \|
		+	\|}
		+	====Description====
		+	The [[IV Graph]] for a '''bulb''' shows that:
		+	*As [[Potential Difference\|potential difference]] increases, [[Electrical Current\|increases]].
		+	*At small [[Potential Difference\|potential differences]]] the the relationship between [[Potential Difference\|potential difference]] and [[Electrical Current\|current]] is [[linear]] (the [[gradient]] is constant).
		+	*At large [[Potential Difference\|potential differences]] the [[gradient]] becomes more shallow as the [[Electrical Resistance\|resistance]] of the '''bulb''' increases.
		+
		+	====Explanation====
		+	: At small [[Potential Difference\|potential differences]] there is a small [[Electrical Current\|current]] so the [[heating]] effect of the [[Electrical Current\|current]] is small and the [[filament]] remains at a low [[temperature]].
		+	: At large [[Potential Difference\|potential differences]] there is a large [[Electrical Current\|electrical current]] so the [[heating]] effect of the [[Electrical Current\|current]] is large which causes the [[filament]] to be a high [[temperature]].
		+	:: This is caused by [[electron]]s in the [[wire]] [[collide\|colliding]] with [[ion]]s in the [[metal]] [[lattice]] causing them to [[vibrate]].
		+	: [[Wire]]s (like the [[filament]]) have a greater [[Electrical Resistance\|resistance]] at higher [[temperature]]s, causing the increase in [[Electrical Current\|current]] to be reduced.
		+	:: This is because the more the [[ion]]s in the [[metal]] [[lattice]] [[vibrate]] the more likely [[electron]]s are to [[collide]] with them and slow down.

← Older revision		Revision as of 11:20, 27 February 2019
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	\| style="height:20px; width:200px; text-align:center;" \|The symbol for an '''electrical bulb'''.		\| style="height:20px; width:200px; text-align:center;" \|The symbol for an '''electrical bulb'''.
	\|}		\|}
		+
		+	==Key Stage 4==
		+	===Meaning===
		+	[[File:BulbSymbol.png\|right\|300px\|thumb\|The symbol for an '''bulb'''.]]
		+	An '''electrical bulb''' is a [[circuit]] [[Electrical Component\|component]] that gives out [[light]] when [[electricity]] goes through it.
		+
		+	===About Electrical Bulbs===
		+	: An '''electrical bulb''' usually refers to a [[Filament Bulb]]. However, there are other types.
		+	: In a [[Filament Bulb\|filament]] '''bulb''' [[Electrical Work\|electrical work]] is done to [[heat]] the filament to a high enough [[temperature]] that it glows in [[Visible Light\|visible light]], see [[Black Body Radiation\|black body radiation]].
		+	: The [[Electrical Current\|electrical current]] has a [[heating]] effect on the filament which increases its [[temperature]]. This causes the [[Electrical Resistance\|resistance]] to increase, so the '''bulb''' does not behave as an [[Ohmic Conductor\|ohmic conductor]].

@@ Line 20: / Line 20: @@
 {| class="wikitable"
 |-
-|[[File:FilamentBulb.png|center|200px]]
+|[[File:FilamentBulb.png|center|100px]]
 |[[File:BulbSymbol.png|center|200px]]
 |-
-|An '''electrical bulb'''.
+| style="height:20px; width:200px; text-align:center;" |An '''electrical bulb'''.
-|The symbol for an '''electrical bulb'''.
+| style="height:20px; width:200px; text-align:center;" |The symbol for an '''electrical bulb'''.
 |}

@@ Line 8: / Line 8: @@
 ==Key Stage 2==
 ===Meaning===
-An '''electrical bulb''' is a circuit component that gives out [[light]] when [[electricity]] goes through it.
+An '''electrical bulb''' is a [[circuit]] [[Electrical Component|component]] that gives out [[light]] when [[electricity]] goes through it.
 : Singular [[Noun]]: '''Electrical Bulb'''
@@ Line 25: / Line 25: @@
 |An '''electrical bulb'''.
 |The symbol for an '''electrical bulb'''.
 |}