Physics Chapter on Electric Circuits and Dipoles
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Questions and Answers

What is the force on an electric dipole with dipole moment along the direction of the electric field?

  • *q*E and *p*E
  • Zero and minimum (correct)
  • 2*q*E and minimum
  • *q*E and maximum

    • A fuse wire should have a high melting point and high specific resistance.

    False

    What is the flux of electric field through a sphere constructed on the periphery of a charged ring?

    q/2ε_0

    In a parallel circuit configuration with resistors, the total current is determined by the sum of the currents through each ______.

    <p>branch</p> Signup and view all the answers

    Which characteristic is vital for a fuse wire to function properly?

    <p>Low melting point, low specific resistance</p> Signup and view all the answers

    Match the characteristics of various circuit components with their functions:

    <p>Fuse = Melts to protect circuit Resistor = Limits current flow Capacitor = Stores electrical energy Battery = Provides voltage</p> Signup and view all the answers

    The force between the plates of a parallel plate capacitor is proportional to the charge on it.

    <p>True</p> Signup and view all the answers

    What is the correct interpretation of the assertion that the electric force is equal to charge per unit area?

    <p>Both assertion and reason are true and reason is the correct explanation.</p> Signup and view all the answers

    Which degree of unsaturation correlates with a neutral compound?

    <p>6</p> Signup and view all the answers

    Match the compounds with their corresponding reactions:

    <p>A. Benzaldehyde = 4. Fries rearrangement B. Phthalic anhydride = 2. Benzoin condensation C. Phenyl benzoate = 3. Oil of wintergreen D. Methyl salicylate = 1. Phenolphthalein</p> Signup and view all the answers

    The final product D in the given reaction sequence is C6H5Br.

    <p>False</p> Signup and view all the answers

    What reagent can distinguish between CH3CHO and C6H5CH2CHO?

    <p>Tollen's reagent</p> Signup and view all the answers

    In the reaction CH3COOH + PCl5, the product 'c' would be __________.

    <p>CH3COC6H5</p> Signup and view all the answers

    What final product is formed after the reactions involving CH3CHO and other reagents?

    <p>C6H5</p> Signup and view all the answers

    Methyl salicylate can be matched with Fries rearrangement.

    <p>False</p> Signup and view all the answers

    Which option correctly identifies A and B in the reaction involving C6H5CH2-O-?

    <p>A = C6H5CH2, B = OH</p> Signup and view all the answers

    If the energy of a capacitor reduces to half in one second, what is the value of resistance?

    <p>2×10³ Ω/ln2</p> Signup and view all the answers

    Match Column - I with Column - II:

    <p>Drift Velocity = m/τ Electrical Resistivity = J/σ Relaxation Period = ne²ντ Current Density = E/ρ</p> Signup and view all the answers

    Capacitance between X and Y is represented by which formula?

    <p>3ε₀A/d</p> Signup and view all the answers

    What is the horizontal displacement of a charged particle descending a distance of y meters?

    <p>4.03×10⁸ m</p> Signup and view all the answers

    A voltmeter with a resistance of 200000Ω that reads 5 volts indicates a proper voltage measurement.

    <p>True</p> Signup and view all the answers

    What is the expression for the relaxation period in an electric context?

    <p>τ = m/ne²ν</p> Signup and view all the answers

    The formula for current density is J = σE, where σ represents the ______.

    <p>conductivity</p> Signup and view all the answers

    In an experiment, when E1 = 12V and internal resistance is zero, and the galvanometer reads zero, what would be the value of resistor X?

    <p>200</p> Signup and view all the answers

    How does the electric field 'E' between the plates of a parallel plate capacitor change with distance 'd' when two dielectric slabs of different constants are inserted?

    <p>A step-like function with two steps, where the first step is higher than the second</p> Signup and view all the answers

    What makes the correct pairing between Current Density and its corresponding formula?

    <p>E/ρ</p> Signup and view all the answers

    If the electric flux associated with the curved surface B of a hollow cylinder with charge q at its center is Φ, what is the flux linked with the plane surface A?

    <p>Φ/2ε0</p> Signup and view all the answers

    A hollow cylinder will have equal electric flux linked with both its curved surface and its flat ends.

    <p>False</p> Signup and view all the answers

    When two dielectric slabs are inserted between the plates of a capacitor, the overall capacitance decreases.

    <p>False</p> Signup and view all the answers

    What happens to the electric field when the distance from plate 'P' increases in a parallel plate capacitor with two different dielectric slabs?

    <p>It changes in a step-like manner.</p> Signup and view all the answers

    The internal resistance of the system in the previously mentioned experiment was _____

    <p>zero</p> Signup and view all the answers

    Match the following scenarios to their respective physical concepts:

    <p>Charge at the center of a hollow cylinder = Electric flux through curved surface Dielectric constants in a capacitor = Change in electric field distribution Discharged capacitor through a resistor = Energy dissipation Zero galvanometer reading = Balanced circuit conditions</p> Signup and view all the answers

    Which statement about substituted nitrophenol is correct?

    <p>Statement I is correct but Statement II is incorrect.</p> Signup and view all the answers

    What stable compound is formed when acetophenone reacts with C2H5ONa?

    <p>None of the above</p> Signup and view all the answers

    Which reagent can distinguish between cis and trans cyclopenta-1,2-diol?

    <p>MnO<sub>2</sub></p> Signup and view all the answers

    What is the order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds?

    <p>I &gt; II &gt; III</p> Signup and view all the answers

    What is the number of hydroxyl groups in compound Q?

    <p>4</p> Signup and view all the answers

    The number of isomeric alcohols of molecular formula C6H14O that give a positive iodoform test is _____

    <p>2</p> Signup and view all the answers

    O-Nitrophenol has higher acidity than p-nitrophenol.

    <p>True</p> Signup and view all the answers

    Match the following compounds with their classifications:

    <p>Acetophenone = Ketone Phenol = Alcohol Cyclopentadiene = Diene Nitrophenol = Aromatic compound</p> Signup and view all the answers

    How many chiral centers does product P have?

    <p>1</p> Signup and view all the answers

    The number of geometrical isomers possible for compound A is _____ .

    <p>2</p> Signup and view all the answers

    Which compounds can be reduced with formaldehyde and concentrated aqueous KOH?

    <p>Compound III</p> Signup and view all the answers

    In the context of the function $f(x) = \frac{1}{3}x^3 + 2x^2 + 3x$ for $x > 0$, which interval is f increasing?

    <p>(0, 2)</p> Signup and view all the answers

    The function $g(x) = f(|x|)$ is always differentiable.

    <p>False</p> Signup and view all the answers

    If $f(x) = (x - 1)^2(x - 2)^3e^x$, what does the function exhibit at $x = 1$?

    <p>Point of inflection</p> Signup and view all the answers

    For the limit as $x$ approaches 2 of the expression $(a^x + a^{3-x} - (a^2 + a)^{x/2}) / (a^x - a^{3-x})$, what is the limit’s value?

    <p>2 log a</p> Signup and view all the answers

    How many points in the interval [1, 2] cause the function $f(x) = (-2)^{[x^3]}$ to be non-differentiable?

    <p>5</p> Signup and view all the answers

    Study Notes

    Physics Multiple Choice Questions

    • Question 1: An electric dipole with charge magnitude q and dipole moment p is placed in a uniform electric field E. If the dipole moment is aligned with the field, the force and potential energy are: Zero and minimum, respectively.

    • Question 2: The characteristic of a fuse wire is: Low melting point, low specific resistance.

    • Question 3: A charge q uniformly distributed on a ring of radius r has electric flux through a sphere of equal radius centered on the ring's periphery: q/ε₀.

    • Question 4: Calculate current through 6V battery in circuit with given values: (1/4)A

    • Question 5: Assertion: The force between capacitor plates is proportional to the charge. Reason: Electric force is charge per unit area. Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

    • Question 6: In an experiment with E₁ = 12V and internal resistance zero, e = 2V, R= 500Ω, and the galvanometer reads zero, then X is: 200Ω.

    • Question 7: Variation of electric field E with distance 'd' from plate P in a parallel plate capacitor with dielectric slabs with constants K₁<K₂: Graph depicts a step function.

    • Question 8: A hollow cylinder with charge q at its center has electric flux through surface B as Φ. The flux linked to surface A is Φ.

    • Question 9: Capacitance is 1µF. Energy reduces to half in one second. Find battery resistance: 2×10³Ω/ln2

    • Question 10: Match Column I (physical terms) to Column II (mathematical relations) for current flow in a conductor.

    • Question 11: Calculate capacitance between X and Y for four metal plates: ε₀A/d

    • Question 12: A charged particle moves in an electric field. Calculate horizontal displacement, given Q/m, E, y and g: 4.03 × 10⁻⁸ m.

    • Question 13: A voltmeter of resistance 200000 reads 5V. Find extra resistance to read 20V: 400000Ω in parallel.

    • Question 14: A clock face with negative charges –q, -2q,...-12q. At what time does hour hand point in the same direction as electric field at the center? 6:30.

    • Question 15: 10V battery with 10Ω internal resistance and 15V battery with 0.6Ω internal resistance in parallel with a 1Ω voltmeter resistance. Find ammeter reading: (115/21) A

    • Question 16: A constant potential difference is applied across a circuit with capacitors. Calculate charge on the 2µF capacitor and potential across the 3µF and 1µF capacitors: approximately 13µC, approximately 4.3V and approximately 11V, respectively.

    • Question 17: Two concentric conducting spherical shells with radii rA and rB. Calculate electric potential along a line through their center.

    • Question 18: For a given circuit diagram, find the current I: 5 A.

    • Question 19: A fully charged parallel plate capacitor of 1µF discharges through a resistor in 1 second. Find the resistance value.

    • Question 20: A conducting sphere of radius R with charge Q, lies inside an uncharged conducting shell of radius 2R. Find amount of heat produced when joined by a metal wire. (1/4πε₀)(Q²/R)

    Chemistry Multiple Choice Questions

    • Question 1: A single cyclic compound is obtained upon ozonolysis. The Cyclic compound is: (image required).

    • Question 2: Organic compound A reacts with sodium metal to form B. Upon heating with conc H₂SO₄, compound A forms diethyl ether. Compound A and B: C₂H₅OH and C₂H₅ONa

    • Question 3: Which reaction describes aldol condensation? (image and reaction required).

    • Question 4: Which compounds are oxidized by MnO₂? Hex-3-ene-1-ol, cyclohex-3-ene-1-ol, hex-2-ene-1-ol.

    • Question 5: Compound C₈H₇Br forms a yellow ppt with alcoholic AgNO₃; aqueous KOH forms B, which reacts to form phthalaldehyde. The structure of A is (image required).

    • Question 6: Which reaction sequence is incorrect to make phenol? (image required).

    • Question 7: Product Z of ethanol reaction with specific reagents.

    • Question 8: In the reaction CH₂=CH-CHO → CH₂=CH-CH₂OH, which reagent is used? H₂, Ni.

    • Question 9: Select compounds that are not soluble in NaHCO₃ solution: (image required).

    • Question 10: Aromatic compound X (C₉H₁₀O), produces 2, 4-DNP derivatives, reduces Tollen's reagent, and undergoes Cannizaro reaction and vigorous Oxidation. What is X? (image required).

    • Question 11: Phenol reacts with HNO₃/H₂SO₄ to produce a compound. Find the degree of unsaturation and nature of compound: 7, acidic.

    • Question 12: Match compounds to their names: Use a table.

    • Question 13: Final product D in a reaction sequence: (image and reaction required.)

    • Question 14: Identify compounds A and B in the reaction (image and reaction required).

    • Question 15: Differentiate between CH₃CHO and C₆H₅CH₂CHO: use distinguishing chemical tests.

    • Question 16: CH₃COOH + PCl₅ → c. What is compound c? Draw the structure.

    • Question 17: Given two statements about the acidic strength of substituted nitrophenols and their similarity with regards to nitro groups. Determine whether the statements are correct or incorrect and what their appropriate relationships are.

    • Question 18: Acetophenone reacts with C₂H₅ONa, Structure of stable compound: (image required).

    • Question 19: Identify reagents to distinguish cis-cyclopenta-1, 2-diol from trans-isomer:

    • Question 20: Order of reactivity of phenyl magnesium bromide (PhMgBr) with compounds. What is the ordering?

    Physics Numerical Questions

    • Question 1: Calculate the value of S in the given limit.

    • Question 2: The number of real solutions for the given equation.

    • Question 3: The minimum value of n for the function.

    Chemistry Numerical Questions

    • Question 1: Count the number of hydroxyl groups in 'Q' from the given reaction.

    • Question 2: Calculate the number of isomeric alcohols for C₆H₁₄O possessing the iodoform test.

    • Question 3: Count the number of chiral centers for product P.

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    Description

    Test your understanding of key concepts in physics, focusing on electric dipoles, circuits, and capacitor behavior. This quiz covers essential principles such as the electric field, characteristics of fuse wires, and the interactions between circuit components. Challenge your knowledge and apply it to real-world scenarios involving electricity and magnetism.

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