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Physics Q1 > Lesson 2: Measurement > Flashcards

Lesson 2: Measurement Flashcards

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1
Q

What is the primary focus of Physics?

A) The study of historical events
B) The study of human behavior
C) The principles governing matter and energy in the universe
D) The development of technology

A

C) The principles governing matter and energy in the universe

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2
Q

Which of the following best defines ‘matter’?

A) Energy that causes movement
B) Anything that has mass and occupies space
C) A type of energy related to heat
D) A measurement of time

A

B) Anything that has mass and occupies space

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3
Q

Which branch of Physics deals primarily with the motion of macroscopic objects?

A) Quantum Mechanics
B) Thermodynamics
C) Relativistic Mechanics
D) Newtonian Mechanics

A

D) Newtonian Mechanics

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4
Q

What type of quantity is ‘speed’?

A) Base Quantity
B) Derived Quantity
C) Fundamental Quantity
D) Scalar Quantity

A

B) Derived Quantity

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5
Q

What does ‘SI Units’ stand for?

A) Standard International Units
B) Scientific Internal Units
C) International System of Units
D) Standardized International Units

A

C) International System of Units

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6
Q

Which of the following defines a meter?

A) The time it takes for light to travel one meter
B) The distance light travels in a vacuum during a specific time interval
C) The average distance between two parallel lines
D) The amount of time light takes to travel a kilometer

A

B) The distance light travels in a vacuum during a specific time interval

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7
Q

What is the base quantity for measuring electric current?

A) Meter
B) Ampere
C) Kilogram
D) Second

A

B) Ampere

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8
Q

Which of the following quantities is considered a base quantity?

A) Force
B) Speed
C) Temperature
D) Pressure

A

C) Temperature

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9
Q

The duration of one second is defined based on the transition of radiation in which atom?

A) Oxygen-16
B) Carbon-12
C) Cesium-133
D) Hydrogen-1

A

C) Cesium-133

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10
Q

Which of the following is NOT a branch of Classical Physics?

A) Thermodynamics
B) Electromagnetism
C) Quantum Mechanics
D) Newtonian Mechanics

A

C) Quantum Mechanics

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11
Q

What does the term ‘energy’ refer to in physics?

A) The weight of an object
B) A property possessed by objects that can cause them to move
C) The time taken for an event to occur
D) The amount of matter in an object

A

B) A property possessed by objects that can cause them to move

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12
Q

Which branch of Physics focuses on the motion of atoms and molecules?

A) Classical Mechanics
B) Thermodynamics
C) Electromagnetism
D) Quantum Mechanics

A

B) Thermodynamics

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13
Q

What type of quantity is ‘force’?

A) Base Quantity
B) Derived Quantity
C) Fundamental Quantity
D) Scalar Quantity

A

B) Derived Quantity

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14
Q

Which of the following is an example of a derived quantity?

A) Length
B) Time
C) Frequency
D) Mass

A

C) Frequency

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15
Q

What defines a ‘unit’ in measurement?

A) A physical quantity that cannot be measured
B) A standard used to measure a quantity
C) The amount of matter in an object
D) A technique used for calculations

A

B) A standard used to measure a quantity

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16
Q

In what system are the most widely used standard measurements defined?

A) Metric System
B) Imperial System
C) International System of Units (SI)
D) American Standard Units

A

C) International System of Units (SI)

17
Q

How is the ampere defined?

A) The force required to move an electric charge
B) The electric current that produces a specific force between conductors
C) The energy consumed by an electric device
D) The speed of electric charges

A

B) The electric current that produces a specific force between conductors

18
Q

What does the study of ‘quantum mechanics’ primarily involve?

A) Large-scale motion of objects
B) Motion of subatomic particles
C) Electrical currents in circuits
D) Thermodynamic processes

A

B) Motion of subatomic particles

19
Q

Which of the following concepts is NOT included in classical physics?

A) Kinematics
B) Electrodynamics
C) Quantum Electrodynamics
D) Fluid Mechanics

A

C) Quantum Electrodynamics

20
Q

What is a key characteristic of relativistic mechanics?

A) It deals with everyday speeds and sizes.
B) It focuses on very fast-moving or very massive objects.
C) It applies only to thermodynamic systems.
D) It ignores gravitational effects.

A

B) It focuses on very fast-moving or very massive objects.

21
Q

Which of the following is a fundamental physical quantity?

A) Speed
B) Pressure
C) Length
D) Work

A

C) Length

22
Q

What is the significance of defining the meter based on the speed of light?

A) It allows for consistent measurement across different conditions.
B) It relates to gravitational forces.
C) It is based on historical artifacts.
D) It simplifies calculations for engineers.

A

A) It allows for consistent measurement across different conditions.

23
Q

Which of the following statements about derived quantities is true?

A) They can be measured directly without calculations.
B) They are only based on one base quantity.
C) They are formed from combinations of base quantities.
D) They do not have units of measurement.

A

C) They are formed from combinations of base quantities.

24
Q

What area does thermodynamics NOT cover?

A) Motion of atoms and molecules
B) Heat transfer and energy transformations
C) The behavior of fluids at rest
D) The motion of celestial bodies

A

D) The motion of celestial bodies

25
Q

The study of motion in Quantum Mechanics primarily focuses on which of the following?

A) Macroscopic objects
B) The behavior of light waves
C) Subatomic particles and their interactions
D) Classical motion laws

A

C) Subatomic particles and their interactions

26
Q

What does accuracy refer to in measurements?
A. The agreement of repeated measurements
B. The exactness of a measurement
C. How close a measurement is to the true value
D. The difference between two measured values

A

C. How close a measurement is to the true value

27
Q

What is precision in measurements?
A. How close a measurement is to the true value
B. The agreement of repeated measurements
C. The accuracy of the instrument
D. The ability to avoid errors

A

B. The agreement of repeated measurements

28
Q

Which of the following is TRUE about precise measurements?
A. Precise measurements are always accurate
B. Precise measurements cannot be inaccurate
C. Precise measurements are not necessarily accurate
D. Precision is irrelevant if accuracy is achieved

A

C. Precise measurements are not necessarily accurate

29
Q

What is the ideal goal for measurement?
A. To be accurate, but not precise
B. To be both accurate and precise
C. To be neither accurate nor precise
D. To rely solely on systematic error

A

B. To be both accurate and precise

30
Q

What is error in the context of measurements?
A. The fluctuation in results over time
B. The difference between the measured value and the true value
C. The level of agreement between repeated measurements
D. The degree of accuracy of an instrument

A

B. The difference between the measured value and the true value

31
Q

What is the source of systematic error?
A. Random fluctuation in readings
B. Inability to read the instrument properly
C. Faulty calibration of measuring instruments
D. Human error in data recording

A

C. Faulty calibration of measuring instruments

32
Q

Which of the following describes random error?
A. It results in measurements being consistently too high or too low
B. It is associated with faulty instruments
C. It occurs with no specific pattern and leads to imprecise results
D. It can be completely eliminated with careful calibration

A

C. It occurs with no specific pattern and leads to imprecise results

33
Q

What is the key difference between systematic and random errors?
A. Systematic errors cause random fluctuations in readings, while random errors do not
B. Systematic errors are associated with the instrument, while random errors are unpredictable
C. Random errors cause consistent inaccuracies, while systematic errors do not
D. Random errors can always be avoided, while systematic errors cannot

A

B. Systematic error

34
Q

Which of the following is a source of random error?
A. Faulty calibration of instruments
B. Errors occurring in a specific pattern
C. Inability to read a fluctuating instrument
D. Consistent bias in the data

A

C. Inability to read a fluctuating instrument

Physics Q1 (7 decks)

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