Podcast
Questions and Answers
What happens to the interference pattern in Young's double slit experiment when the slits are brought closer together?
What happens to the interference pattern in Young's double slit experiment when the slits are brought closer together?
Moving the screen away from the slits decreases the distance between the interference fringes.
Moving the screen away from the slits decreases the distance between the interference fringes.
False (B)
What instrument does a virologist use to study details of a virus?
What instrument does a virologist use to study details of a virus?
Electron microscope
The work function for a photosensitive material is defined as the minimum energy required to remove an electron from the ______.
The work function for a photosensitive material is defined as the minimum energy required to remove an electron from the ______.
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Match the following terms with their descriptions:
Match the following terms with their descriptions:
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What is the calculated resistance to be connected to the galvanometer to convert it to an ammeter?
What is the calculated resistance to be connected to the galvanometer to convert it to an ammeter?
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The magnetic field exerted by a circular coil carrying current depends only on the number of turns of the coil.
The magnetic field exerted by a circular coil carrying current depends only on the number of turns of the coil.
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What is the value of Ig when Vg is 200 mV and G is 100 Ω?
What is the value of Ig when Vg is 200 mV and G is 100 Ω?
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At the center (x = 0) of a circular coil, the magnetic field B is equal to _____ times B0.
At the center (x = 0) of a circular coil, the magnetic field B is equal to _____ times B0.
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Match the variables with their corresponding definitions:
Match the variables with their corresponding definitions:
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What is the formula for current in a load resistance R given an emf E and internal resistance r?
What is the formula for current in a load resistance R given an emf E and internal resistance r?
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In circuit 1 where the cells are in series, the equivalent emf is equal to the sum of the individual emfs.
In circuit 1 where the cells are in series, the equivalent emf is equal to the sum of the individual emfs.
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What happens to the drift velocity as the length of the conductor increases to 4l, given that drift velocity is inversely proportional to length?
What happens to the drift velocity as the length of the conductor increases to 4l, given that drift velocity is inversely proportional to length?
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In both circuits, if the current remains the same, it is derived that internal resistance r is equal to the _____ resistance R.
In both circuits, if the current remains the same, it is derived that internal resistance r is equal to the _____ resistance R.
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Match the following concepts with their definitions:
Match the following concepts with their definitions:
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What is the wavelength of the laser beam produced?
What is the wavelength of the laser beam produced?
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The energy of a photon is calculated to be 2·8516 × 10-19 J.
The energy of a photon is calculated to be 2·8516 × 10-19 J.
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How many photons are emitted per second if the power is 100 W?
How many photons are emitted per second if the power is 100 W?
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The current through the circuit when using Ohm's law is _____ A.
The current through the circuit when using Ohm's law is _____ A.
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Match the terms to their definitions:
Match the terms to their definitions:
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What energy is required to transition an electron from energy level E1 to E2?
What energy is required to transition an electron from energy level E1 to E2?
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An atom requires a wavelength of radiation corresponding to E2's energy to excite an electron from E1.
An atom requires a wavelength of radiation corresponding to E2's energy to excite an electron from E1.
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What happens to the current in a diode when it is reverse biased?
What happens to the current in a diode when it is reverse biased?
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The saturation current in a diode refers to the constant current that flows _______.
The saturation current in a diode refers to the constant current that flows _______.
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What is the primary reason no current flows when the applied voltage during forward bias is small?
What is the primary reason no current flows when the applied voltage during forward bias is small?
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Match the following constants with their values:
Match the following constants with their values:
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When power from an external source is 100 W, how do you find the rate of photon emission?
When power from an external source is 100 W, how do you find the rate of photon emission?
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In a circuit with infinite resistance during reverse bias, the reverse current is typically measured in _______.
In a circuit with infinite resistance during reverse bias, the reverse current is typically measured in _______.
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What is the mass of a neutral extsuperscript{235}U atom in unified atomic mass units?
What is the mass of a neutral extsuperscript{235}U atom in unified atomic mass units?
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During Rutherford’s gold foil experiment, all alpha particles deflected at the same angle.
During Rutherford’s gold foil experiment, all alpha particles deflected at the same angle.
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What is the unified atomic mass unit (u)?
What is the unified atomic mass unit (u)?
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In the fission reaction, extsuperscript{92}U + 0n → extsuperscript{236}U → extsuperscript{36}Kr + extsuperscript{90}____ + 3 0n.
In the fission reaction, extsuperscript{92}U + 0n → extsuperscript{236}U → extsuperscript{36}Kr + extsuperscript{90}____ + 3 0n.
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Match the following elements with their masses:
Match the following elements with their masses:
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What correctly describes the energy change when electrons return to the ground state in an atom?
What correctly describes the energy change when electrons return to the ground state in an atom?
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The energy equivalent of one unified atomic mass unit can be calculated.
The energy equivalent of one unified atomic mass unit can be calculated.
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What hypothesis was made about the deflection of the alpha particle by 180° in Rutherford’s experiment?
What hypothesis was made about the deflection of the alpha particle by 180° in Rutherford’s experiment?
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Study Notes
Instructions for Candidates
- Candidates are allowed an additional 15 minutes for only reading the question paper.
- Reading time should not be used for writing.
- The question paper has 12 printed pages and 20 questions.
- The paper consists of four sections (A, B, C, and D).
- Internal choices are available in two questions each in Sections B, C, and D.
- Section A has one question with 14 subparts, each worth one mark.
- Section B has seven questions, each worth two marks.
- Section C has nine questions, each worth three marks.
- Section D has three questions, each worth five marks.
- Answer all questions.
- Intended marks for each question are given in brackets.
- A list of useful constants and relations is provided at the end of the paper.
- A simple scientific calculator (without programmable memory) can be used.
- The examiner should read aloud the instructions to all candidates.
Section A - 14 Marks
- This section is multiple choice, with options to choose from.
- Choose the correct alternative for each question (a, b, c, or d) for questions (i) to (vii).
- Each question is worth 1 mark.
Section B - 14 Marks
- This section has short answer questions.
- Questions are worth 2 marks each.
- Internal choices are available for some questions.
Section C - 27 Marks
- This section includes detailed questions worth 3 marks each.
- Internal choices are available.
Section D - 15 Marks
- This section includes longer answer questions worth 5 marks each.
- Internal choices are provided.
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Description
This quiz covers the essential instructions for candidates taking a science examination. It details the structure of the question paper, including sections with varying marks and internal choices. Candidates are encouraged to utilize the reading time effectively before starting to answer questions.
