Questions and Answers
Which of the following statements is correct regarding the heat supplied to a substance with a mass of 10g and a temperature rise of 100°C? (Select the correct option)
A switch connected to the neutral wire can make and break a circuit.
True
What is the specific heat capacity of the substance given a heat supply of 120 J and a mass of 10 g with a temperature increase of 100°C?
1.2 J/gK
The resistivity of Gold is $2.1 \times 10^{-8}$ ohm m and for Platinum, it is __________ ohm m.
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Which statement is true regarding the resistance of wires made from Gold and Platinum?
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Match the given scenarios with their outcomes:
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The neutral wire in a circuit has a potential of zero volts.
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What voltage is typically supplied by a switch connected to the neutral wire?
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Which of the following equations are correctly balanced?
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A tuning fork produces a louder sound when placed over a partially filled cylinder than an empty cylinder.
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What is the primary factor that determines the thermal capacity of a substance?
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The order of resistance for conductors depends on their diameter: the larger the diameter, the ______ the resistance.
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Match the physical concepts with their definitions:
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What will happen when the same quantity of heat is supplied to metals with different masses?
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Conductors of smaller diameters always have higher resistance than larger ones regardless of length.
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List the types of waves that are involved in sound propagation.
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After lubricating a pulley, which of the following relationships is correct?
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The i vs. r graph for a glass block is a straight line due to Snell's law.
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What is the relationship between the speed of UV light and microwaves in a vacuum?
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The ________ of UV is greater than the ________ of microwaves.
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Which characteristic of a wave is altered when volume is reduced?
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Match the following types of light phenomena with their descriptions:
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Mechanical advantage always increases when friction is reduced.
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What law describes the relationship between the angle of incidence and the angle of refraction?
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Study Notes
Heat and Temperature
- Mass of the substance is 10g, with a heat supply of 120J.
- Rise in temperature is 100°C.
- Heat capacity of the substance is 12 J/g.
- Specific heat capacity of the substance is 1.2 J/gK.
- Evaluating statements reveals that both A and B are correct.
Electricity and Magnetism
- Resistivity values: Gold at 2.1x10^-8 ohm m and Platinum at 10.5x10^-8 ohm m.
- Statement A: 5 metres of platinum wire has the same resistance as 1 metre of gold wire.
- Statement B: Gold wire of 1cm radius has the same resistance as platinum wire of 5cm radius.
- Evaluating these statements may reveal only one or both to be correct.
Circuit Analysis
- A switch can make and break a circuit when connected to the neutral wire.
- Neutral wire is at zero potential.
- Evaluation of Assertion and Reason could show if both are true and if reason explains assertion.
Magnetism in Rods
- Rods A, B, C, and D can attract each other based on their connections to a battery.
- Conditions depend on which rods are connected to the battery's positive or negative terminals.
Modern Physics
- An equation balancing question may require understanding of chemical equations and their stoichiometry.
Sound Waves
- Tuning forks L, M, and N produce loud sound above varying water levels in cylinders.
- Correct combinations of forks and cylinders correlate with loudness of sound produced.
Thermal Capacities
- For metals A, B, and C with heat applied, their masses in the ratio 2:3:4 yield resultant thermal capacities in the same ratio.
- If the temperature rise is the same, thermal capacities mirror masses.
Resistivity of Conductors
- Different copper conductors with various diameters and lengths lead to varying resistances.
- Understanding how geometry affects resistance is essential.
Mechanical Advantage and Efficiency
- Analysis of a movable pulley's efficiency, effort, and mechanical advantage is influenced by lubrication.
- Changes in calculations post-lubrication indicate changes in performance metrics.
Light and Refraction
- For a glass block, the angle of incidence (i) versus angle of refraction (r) follows a straight line.
- This behavior adheres to Snell's law, demonstrating the predictable nature of refraction.
Wave Characteristics
- Speed of UV radiation is greater than that of microwaves when considering transmission in a vacuum or medium.
- Volume reduction in sound corresponds to changes in wave characteristics, affecting amplitude rather than frequency or wavelength.
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Description
Test your understanding of key concepts in heat transfer, electricity, and magnetism. This quiz covers specific topics such as heat capacity, resistivity, and circuit analysis. Evaluate statements and assertions to demonstrate your comprehension of these fundamental physics principles.
