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EmSAT Achieve Exam  >  EmSAT Achieve Tests  >  Physics for EmSAT Achieve  >  Test: Equivalence Principle - EmSAT Achieve MCQ

Test: Equivalence Principle - EmSAT Achieve MCQ


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10 Questions MCQ Test Physics for EmSAT Achieve - Test: Equivalence Principle

Test: Equivalence Principle for EmSAT Achieve 2025 is part of Physics for EmSAT Achieve preparation. The Test: Equivalence Principle questions and answers have been prepared according to the EmSAT Achieve exam syllabus.The Test: Equivalence Principle MCQs are made for EmSAT Achieve 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Equivalence Principle below.
Solutions of Test: Equivalence Principle questions in English are available as part of our Physics for EmSAT Achieve for EmSAT Achieve & Test: Equivalence Principle solutions in Hindi for Physics for EmSAT Achieve course. Download more important topics, notes, lectures and mock test series for EmSAT Achieve Exam by signing up for free. Attempt Test: Equivalence Principle | 10 questions in 10 minutes | Mock test for EmSAT Achieve preparation | Free important questions MCQ to study Physics for EmSAT Achieve for EmSAT Achieve Exam | Download free PDF with solutions
Test: Equivalence Principle - Question 1
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What does the equivalence principle state about the relationship between gravitational and inertial mass?

Detailed Solution for Test: Equivalence Principle - Question 1
The equivalence principle asserts that gravitational mass (the charge interacting with gravity) and inertial mass (an object's responsiveness to acceleration) are equivalent. This equivalence implies that all objects fall with the same acceleration in a uniform gravitational field, as their inertial and gravitational masses cancel out. For example, near Earth's surface, this acceleration is approximately 9.8 m/s². This principle is fundamental to understanding the uniformity of gravitational behavior across all objects.
Test: Equivalence Principle - Question 2
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According to the Einsteinian interpretation, what happens to two apples in a falling elevator as it approaches Earth?

Detailed Solution for Test: Equivalence Principle - Question 2
In a falling elevator, both the elevator and the apples are in free fall, experiencing the same acceleration due to gravity. However, as the elevator approaches Earth, the gravitational force slightly varies with distance, causing the paths of the apples to converge toward the Earth's center. This convergence demonstrates how local experiments cannot fully reveal global gravitational effects, a core concept of the equivalence principle.
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Test: Equivalence Principle - Question 3
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What is the weak equivalence principle primarily concerned with?

Detailed Solution for Test: Equivalence Principle - Question 3
The weak equivalence principle focuses on the equivalence between gravitational and inertial mass. It asserts that the motion of freely falling bodies is independent of their composition or structure. This principle underpins the universality of free fall, as demonstrated by experiments involving various materials falling with identical acceleration under gravity.
Test: Equivalence Principle - Question 4
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What type of experiment tests the equivalence principle by comparing the accelerations of test bodies toward the Sun?
Detailed Solution for Test: Equivalence Principle - Question 4
Experiments testing the equivalence principle often involve comparing the accelerations of different materials (e.g., Be, Al, Cu, and Si) toward the Sun. These tests aim to validate the universality of free fall and assess whether gravitational self-energy affects adherence to the equivalence principle. They complement laser-ranging data by isolating effects related to composition and gravitational binding energy.
Test: Equivalence Principle - Question 5
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Why could a vector field interacting with mass violate the equivalence principle?
Detailed Solution for Test: Equivalence Principle - Question 5
A vector field interacting with mass could violate the equivalence principle because vector fields generally have charges and anticharges. If a vector field coupled with mass, it would imply the existence of "antimass" behaving oppositely in a gravitational field. This behavior contrasts with the equivalence principle, which assumes uniformity in the response of all matter to gravity.
Test: Equivalence Principle - Question 6
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Which experiment aims to test the universality of free fall (UFF) by investigating dark matter interactions with ordinary matter?
Detailed Solution for Test: Equivalence Principle - Question 6
Experiments involving test bodies attracted toward the center of our Galaxy aim to investigate whether the significant force between dark matter and ordinary matter is purely gravitational, adhering to the UFF. These experiments are designed to verify if dark matter behaves like other forms of matter under gravity, ensuring that no new forces exist that violate the equivalence principle.
Test: Equivalence Principle - Question 7
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Why was uranium chosen as the attractor in experiments testing the UFF at short ranges?
Detailed Solution for Test: Equivalence Principle - Question 7
Uranium was selected for these experiments because of its high density, which enables a large mass to be placed near the torsion balance for testing short-range gravitational effects. These experiments help address the sensitivity gap in UFF tests at distances between 10 km and 1000 km, providing insights into short-range interactions and ruling out hypothetical fifth forces.
Test: Equivalence Principle - Question 8
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What distinguishes the strong equivalence principle from the weak equivalence principle?
Detailed Solution for Test: Equivalence Principle - Question 8
The strong equivalence principle generalizes the weak equivalence principle by stating that all laws of nature, not just the behavior of freely falling bodies, hold true in locally inertial frames. It even incorporates gravitational self-energy into the framework, demonstrating a broader scope compared to the weak equivalence principle, which primarily focuses on the equality of inertial and gravitational mass.
Test: Equivalence Principle - Question 9
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What is a significant experimental finding from tests of UFF involving Be, Al, Cu, and Si attracted by the Earth?
Detailed Solution for Test: Equivalence Principle - Question 9
Tests of UFF using materials such as Be, Al, Cu, and Si attracted by the Earth produced null results, meaning no deviations from the equivalence principle were observed. These findings support the universality of free fall and demonstrate that all objects, regardless of their composition, experience the same gravitational acceleration.
Test: Equivalence Principle - Question 10
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Why are scalar charges not conserved under Lorentz transformations?
Detailed Solution for Test: Equivalence Principle - Question 10
Scalar charges are not conserved under Lorentz transformations because the integral involves the charge density (a Lorentz scalar), which is integrated over a volume element that changes with reference frames. Unlike vector charges, which remain Lorentz invariant due to compensating factors in current density and volume element, scalar charges are dependent on the reference frame, leading to interesting variations in interactions based on relativistic effects.
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