"); document.writeln(""); document.close(); return(false); } function BuildPrefixText(answerIndex, responseText, isCorrect) { var text; var listIndex; text = "" if (isCorrect) text += "" else text += "" if (listMap.charAt(answerIndex) == "1") { if (responseText.length == 0) responseText = " "; text += "  " + responseText + " "; } text += "" return(text); } function TranslateHtmlString(text) { var newText; var replaceString; var position; var length; var breakPos; var skipExtra; var i; newText = ""; position = 0; length = text.length; while (position < length) { skipExtra = 0; breakPos = -1; for (i=position; i < length && breakPos < 0; ++i) { switch(text.charAt(i)) { case '>': replaceString = ">"; breakPos = i; break; case '<': replaceString = "<"; breakPos = i; break; case '&': replaceString = "&"; breakPos = i; break; case '\r': if ((i + 1) < length && text.charAt(i + 1) == '\n') skipExtra = 1; replaceString = "
"; breakPos = i; break; case '\n': replaceString = "
"; breakPos = i; break; case ' ': if ((i + 1 < length) && text.charAt(i + 1) == ' ') { replaceString = " "; breakPos = i; } break; } } if (breakPos < 0) { newText += text.substring(position, length); position = length; } else { if (breakPos > position) newText += text.substring(position, breakPos); newText += replaceString; position = breakPos + 1 + skipExtra; } } return(newText); } function GetFeedback(text, index) { var list = text.split("\t"); if (index >= 0 && index < list.length) return(list[index]); return(""); } function TranslateAnswer(s, answerIndex) { return(s); } function ScoreAnswer(answerIndex, responseText, pointsPossible) { var answerText = TranslateAnswer(ansMap[answerIndex], answerIndex); var qtype = qtypeMap.charAt(answerIndex); var nrExactMatch = false; var result = new Array(); result.numPoints = 0; result.isCorrect = false; if (qtype == "3" && answerText.substring(0, 2) == "p:") { answerText = answerText.substr(2); if (responseText.toUpperCase() == answerText.toUpperCase()) result.isCorrect = true; else result.numPoints = MultiResponseCompare(responseText, answerText, pointsPossible); } else if (qtype == "6") { if (answerText.substring(0, 2) == "==") { answerText = answerText.substr(2); nrExactMatch = true; } if (NumericCompare(responseText, answerText, nrExactMatch)) result.isCorrect = true; } else if (qtype == "7") { if (CompletionCompare(responseText, answerText)) result.isCorrect = true; } else if (responseText.toUpperCase() == answerText.toUpperCase()) result.isCorrect = true; if (result.isCorrect) result.numPoints = pointsPossible; return(result); } function StripSpaces(s) { var len; var i; len = s.length; for (i=len - 1; i >= 0 && s.charAt(i) == " "; --i) len = i; if (len == 0) s = ""; else if (len != s.length) s = s.substring(0, len); return(s); } function MultiResponseCompare(responseText, answerText, pointsPossible) { } function NumericCompare(response, answer, exactMatch) { } function CompletionCompare(responseText, answerText) { return(false); } function FixMTF(f) { } function FixMR(f) { } function AllowReset() { return(window.confirm("Do you want to clear all of your answers?")); } function Restart() { if (AllowReset()) { document.TestForm.onreset = function() { }; document.TestForm.reset(); document.TestForm.onreset = function() { AllowReset(); }; } } // -->
 
Name: 
 

Practice Test 3B



Multiple Choice
 

 1. 

How many electrons are in a neutral atom of iron (Fe) if it has a mass number of 58 and atomic number of 26?
A)
32
B)
84
C)
58
D)
26
 

 2. 

Which type of radiation emitted from a nucleus has the most penetrating power?
A)
beta
B)
gamma
C)
positron
D)
alpha
 

 3. 

Two charges a distance of 2 cm apart are moved to a distance of 10 cm apart.  What happends to the force between the two charges?
A)
It decreases by 25 times
B)
It decreases by 5 times
C)
It increases by 5 times
D)
It increases by 25 times
 

 4. 

mc004-1.jpg decays to mc004-2.jpg by emitting which of the following?
A)
alpha
B)
gamma
C)
positron
D)
beta
 

 5. 

A transformer with 1200 turns on its primary coil is used to decrease the voltage from 3600 volts to 120 volts.  How many turns should there be on the secondary coil?
A)
80
B)
30
C)
40
D)
60
 

 6. 

The current in a 60-watt lamp connected to a 120-V source is
A)
7200 A
B)
90 A
C)
2 A
D)
0.5 A
 

 7. 

When mc007-1.jpg undergoes a beta decay, the daughter nuclide is
A)
mc007-2.jpg
B)
mc007-3.jpg
C)
mc007-4.jpg
D)
mc007-5.jpg
 

 8. 

The electric potential difference across a 5-ohm resistor with a current of 5 amps is
A)
100 V
B)
10 V
C)
25 V
D)
1 V
 

 9. 

Two resistros of 20-ohms each are connected in parallel.  What is the total resistance for this arrangement?
A)
40 ohms
B)
20 ohms
C)
5 ohms
D)
10 ohms
 

 10. 

Radioactivity was first discovered by
A)
Becquerel
B)
Roentgen
C)
Rutherford
D)
Cuie
 

 11. 

An atom with 74 protons, 109 neutrons and 74 electrons has a mass number of
A)
148
B)
109
C)
74
D)
183
 

 12. 

The half-life of Na-24 is 15 hours.  Starting with 1000 g of radionuclide, how many grams would remain after 45 hours?
A)
250 g
B)
125 g
C)
333 g
D)
500 g
 

 13. 

The magnitude of the electric force between two charges is
A)
inversely proportional to the square of the distance between them.
B)
inversely proportional to the magnitude of the charges.
C)
directly proportional to the square of the distance between them.
D)
none of the above.
 

 14. 

A magnetic field is produced
A)
by electric charges in motion
B)
by both static and moving electric charges
C)
only by a permanent magnet
D)
by static electric charges
 

 15. 

Rutherford’s “gold foil” experiment proved that
A)
atoms are mostly empty space
B)
nuclei have positive charges
C)
nuclei are very small
D)
all of the above
 



 
Check Your Work     Start Over