What is Multiple choice: Definition and 165 Discussions
Multiple choice, objective response, or MCQ (for Multiple Choice Question) is a form of an objective assessment in which respondents are asked to select only correct answers from the choices offered as a list. The multiple choice format is most frequently used in educational testing, in market research, and in elections, when a person chooses between multiple candidates, parties, or policies.
Although E. L. Thorndike developed an early scientific approach to testing students, it was his assistant Benjamin D. Wood who developed the multiple-choice test. Multiple-choice testing increased in popularity in the mid-20th century when scanners and data-processing machines were developed to check the results. Christopher P. Sole created the first multiple-choice examination for computers on a Sharp Mz 80 computer in 1982. It was developed to aid people with dyslexia cope with agricultural subjects, as Latin plant names can be difficult to understand and write. The first complete exam was developed at St Edwards School in Romsey, England.
Hello everyone, thank you for taking your time to read this. I was assigned a homework task of multiple choice questions to do with gravitational fields. This is one of the last questions and I have been pondering over it for some time now. I don't understand how any sort of answer is...
The variation with time t of the acceleration a of an object is shown
What is the change in velocity of the object from ##t=0## to ##t=6##?
A. ##6ms^{-1}##
B. ##8ms^{-1}##
C. ##10ms^{-1}##
D. ##14ms^{-1}##
So apparently the answer is B, which I am having trouble reconciling.
Using methods...
Hey! 😊
A multiple choice test consists of 10 questions. For every question there are five possible answers, of which exactly one is correct. A test candidate answers all questions by chance.
(a) Give a suitable random variable with value range and probability distribution in order to work on...
\begin{Form}
Let f be the function given by $f(x)=300+x^3$. On which of the following intervals is the function f increasing?\par
\ChoiceMenu[radio,radiosymbol=\ding{108}, name=b]
{\textcolor{white}{}}{ }
$(-\infty,-10]\cup[10,\infty)$ \par...
Consider a region where a 25-volt-per-meter electric field and a 15-millitesla magnetic field exist and are along the same direction. If the electron is in the said region, is moving at a direction 20 degrees counter-clockwise from the direction of the magnetic field, and is experiencing a total...
My attempt at a solution: Is my logic accurate/correct, and is my answer correct?
I consider the forces acting to be: Restoring forces in springs parallel, and Force of the current-carrying conductor in the Magnetic field. I imagine a vertical displacement of y upwards ( direction determined...
i. Rearranging the equation for kinetic energy in terms of momentum;
1/2mv^2=(mv)^2/2m=p^2/2m
Inputting the values given KE=1^2/2*4kg = 1/8 J
Kinetic energy of a body with twice the momentum; KE=2^2/2*2kg =1 J
The ratio of the kinetic energy of the first body to the second body is therefore...
1. I believe that the gravitational field strength would decrease because it is inversely proportional to the square of the distance from the centre of the Earth, g∝1/r^2.
Gravitational potential energy at large distances is directly proportional to the masses and inversely proportional to the...
Homework Statement:: Consider an electron trapped in a one-dimensional finite well of width L. What is the minimum possible kinetic energy of the electron?
A) 0
B) Between 0 and h^2/8mL^2
C) ≈h^2/8mL^2, but it is not possible to find the exact value because of the uncertainty principle
D)...
ok just posted an image due to macros in the overleaf doc
this of course looks like a sin or cos wave and flips back and forth by taking derivatives
looks like a period of 12 and an amplitude of 3 so...
but to start I was not able to duplicate this on desmos
altho I think by observation alone...
As you can see when the switch is open it measures the voltage across the battery or emf I am assuming when calculating the internal resistance when the switch is closed voltage is 6 right so the internal resistance is 6/2 =3 which is not correct. answer is A
Does this mean when the switch is...
I understand how they arrived at the answer of 2Q , but i have a couple of questions on this. If one of the charges were negative for example how would the resultant potential be found then? at the middle point would i add the positive charges and subtracted the negative ? Also what would the...
I selected A, because the ball is merely in motion due to the force of gravity (after applied force).
My teacher has not concerned us with air resistance so can someone please explain why the correct answer is C? I reasoned that gravity was always accelerating the ball at -9.8 m/s^2...
Homework Statement A boy launches a 20 g dart horizontally by a spring gun from a balcony 45 m above the ground. The dart lands 15 m away from the balcony. If the length of the gun’s barrel is 10 cm, what is the average horizontal force applied by the spring?(A) 1.0N (B) 2.0 N (C) 2.5 N (D) 5. N...
1. A student measures the density of a metal and calculates answer to be 8543.2kgm^-1 . The result is accurate to +- 1.1%
Which of the following states answer to an appropriete number of sig figs?
A 8.543x10^3
B 8.5x10^3
C 9x10^3
D 8.54x10^3
2. Relative Uncertainty = Absolute Uncertainty/...
Homework Statement
The correct answer according to answer sheet is answer B.
Homework Equations
λn= 2L/n (both ends open)
λn = 4L/n (one end open one end closed)
c=λf
Speed of sound does not change. as it is still in air... (correct assumption? )
The Attempt at a Solution
f1= 500Hz
L =...
Homework Statement
Homework Equations
Fnet= Δp/Δt
p=mv
The Attempt at a Solution
p (before) = 0.4 x 5 = 2
p (after) = 0.4 x 3 = 1.2
Δp = 0.8
Δt = 0.2
Fnet= Δp/Δt
0.8/0.2 = 4N
Correct answer in textbook is D, I do not understand why?
Homework Statement
If Z= (1)/(z conjugate) then Z : ?
Homework EquationsThe Attempt at a Solution
let z= a+bi
the z conjugate= a-bi
(a+bi)=(1)/(a-bi)
(a+bi)(a-bi)=1
a2+b2=1
does it tell from this expresssion that the complex number is a pure real ?
Homework Statement
Homework Equations
The Attempt at a Solution
I think External char = Magnaetic characteristics - Armature reaction drop - Ohmic drop since we're subtracting these values from voltage.
But book answer is D. Magnetization char + armature reaction - Ohmic drop.
Is book...
Homework Statement
More than one options may be correct .
Homework EquationsThe Attempt at a Solution
[/B]
Options a) and c) are correct . But I don't understand how non magnetic metal reacts to the magnetic field .
Is it in some way related to ferromagnetism ? But then either both b)...
Homework Statement
More than one options may be correct .
Homework Equations
Inductive reactance =ωL
Capacitive reactance = 1/ωC
The Attempt at a Solution
On increasing the frequency , inductive reactance increases whereas capacitive reactance decreases . Thus , option a) is correct ...
Homework Statement
Hello,
Here is a multiple choice question I would like to be clarified.
Suppose that the angular momentum of a system can take the values 0, 1, 2. One carries out a measurement of ##J_z##,the state of the system will:
##a##-Be perfectly known if the result is 0
##b##-Be...
Homework Statement
A vacuum photodiode detector utilizes the photoelectric effect to detect light. The photoelectric effect causes electrons to be ejected from a metal plate when photons of light are absorbed by the metal. The energy of a photon is given by the equation E = hf, where h = 6.6 x...
Would you please introduce me some textbooks that offer multiple choice or true-false questions at the end of each chapter so I can practice before my final exam? Basically, that class I am taking right now cover many central topics in Undergraduate Probability course such as:
• Moments and...
Homework Statement
E is the "right answer"
Homework Equations
B around a long wire = mu * I / [2 * pi * r]
The Attempt at a SolutionOK. I know that the magnetic field lines will travel in a clockwise direction around the wire from the viewer's orientation with the current going away from...
Homework Statement
PQRS is a square. Three point charges -Q, +Q and -3Q are fixed at P, Q and S respectively as shown.
A point charge q is then placed at R and it experiences a net electric force towards S. Which of the following is equal to q?
photo ...
1.
The equation below represents the reaction of chlorine with hot concentrated potassium hydroxide solution: 3Cl2(g) + 6KOH(aq) → 5KCl(aq) + KClO3(aq) + 3H2O(l) Which of the following statements concerning this reaction is/are correct?
(1) Potassium hydroxide acts as a reducing agent
(2)...
Homework Statement
Homework Equations
sum of torques = 0
The Attempt at a Solution
So I tried to put the torques into the equation:
Sum torques = mgL - T *sin(theta) * (L-x) = 0.
Solving for the T gave me [mgL]/[ (L-x) * sin(theta) ]. This is not an option in the answers.
Could anyone...
Homework Statement
The cell in the circuit has an emf of 2.0 V. When the variable resistor has a resistance of 4.0 Ω, the potential difference (pd) across the terminals of the cell is 1.0 V.
What is the pd across the terminals of the cell when the resistance of the variable resistor is 12...
Homework Statement
http://gpschools.schoolwires.net/cms/lib05/MI01000971/Centricity/Domain/272/Chapter%205%20MC%2013.pdf
It is problem 22 on page 7 of the document:
A block of mass M1 on a horizontal table is connected to a hanging block of mass M2 by a string that passes over a pulley, as...
Homework Statement
A mass M hangs in equilibrium on a spring. M is made to oscillate about the equilibrium position by pulling it down 10 cm and releasing it. The time for M to travel back to the equilibrium position for the first time is 0.5s. Which line, A to D, is correct for these...
Homework Statement
I found this problem online for extra practice for my AP Chem class.
https://www.quia.com/files/quia/users/jpugteach/APChem/AP-Chem-Chapter-19-Graphs.pdf
The problem in question is number 4.
I do not understand how to solve it and why the answer D is correct.
Homework...
Homework Statement
A book of mass m is sitting on a table of mass M. Which of the following statements regarding Newton's Laws of motion is true?
(a) Newton's Third Law says that the magnitude of the normal force from the table on the book is equal to mg.
(b) Newton's Second Law says that the...
Homework Statement
For #5, I added option E, it's the same as B, but the charges are switched around.
Homework EquationsThe Attempt at a Solution
[/B]
1) Even though A and B look similar, B seems more accurate. The arrows in the corner of A don't seem to point directly to the corner...
Homework Statement
A wooden cube is floating in water. The upper face of the cube meets the surface of a pool of water when a block with mass 0.200 kg is placed on top of the cube. When you remove the block, there's a 2 cm difference in height between the upper face and the water surface...
Homework Statement
Hey, I just need a quick check on these questions.
1) In a regular sound wave, the displacement of the medium is:
A. perpendicular to the wave velocity
B. sometimes perpendicular and sometimes parallel to the wave velocity
C. parallel to the wave velocity.
D. neither...
Homework Statement
There is an optical fiber.A light ray enter it at i°.Total internal reflection occur at X.
What are the necessary conditions for the light ray to travel along the core of the fiber?
(I have canceled B and D already.)
A.n1>n2 and angle i should be greater than a certain value...
Homework Statement
1.
You observe two events to occur simultaneously. A friend is moving with respect to you. The friend will see
:
The event the friend is moving towards occurs first, in their perspective
The order of the events is random and cannot be predicted
The events occur...
Homework Statement
The term chlorine is used to mean a number of possible types of matter containing chlorine atoms, such as Cl2(g), Cl(g), and Cl-(aq). Which of these forms of chlorine would have a zero standard enthalpy of formation?
a) Cl2(g), Cl(g), and Cl-(aq)
b) Cl(g)
c) Cl-(aq)
d)...
Hi everyone,
a friend once emailed me a crazy multiple choice question. I thought about it for a while but then gave up.
I can't find it anymore, but I remember it was something like:
What is the probability of answering this question correctly?
1) 100%
2) 50%
3) 33%
Does anybody know what the...
Homework Statement
5) Examine the following sequence:
5' GAATTC 3'
3' CTTAAG 5'
If this sequence was disgested with an enzyme (ex. ECOri) which cut between the guanine and adenine bases on which would it have?
A) 3' overhang
B) Blunt ends
C) 5' overhang
D) Any of these
Homework Equations
n/a...
hi all...
how to easy find to figure it out this problem..
how to find are that shading blue color..
please, see my picture..
thanks in advance...susanto3311
Hey, i was doing a multiple choice question and i got 0.83/1 on it... There were 6 options to choose from and you could choose as many as you liked. I only picked one of the options. I'm confused as to how or what equation is used to calculate what mark you will get on each multiple choice...
Homework Statement
A thin film of glass is in flush contact with a thin film of transparent plastic that has a higher index of refraction than the glass. Monochromatic light of a certain frequency is shown on both sides of this combination, and there is very little light reflected from either...
Consider the following java code
int a=1;
if (a != 0)
{
int a=3;
}
System.out.print(a);
What is the output
A. 0
B. 1
C. 3
D. No output. A compilation error occurs
The answer is B. I want to ask why the output shown will not be 3. As the 1 is not equal to 0, should the ' int a '...
Hey guys! This is my first post, so hopefully it is in the correct spot.
I'm a grade 12 student in Canada. I am thinking of majoring in computer science because I love logic and technology. I plan on taking some physics electives because I enjoy physics, more specifically modern physics...
Homework Statement
Homework Equations
The Attempt at a Solution
## α = v\frac{dv}{ds} ## and K is the kinetic energy .
In all the four cases ## α = v\frac{dv}{ds} = mgsinθ ## where θ is the angle which the normal to the body makes with the vertical .
Fig 1) K...