DSC A-Major MCQ

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What is the difference between systematic and random errors?

• Systematic errors fluctuate unpredictably, while random errors are consistent.
• Systematic errors are due to predictable biases, while random errors fluctuate due to unpredictable factors.
• Systematic errors only affect measurements of temperature, while random errors affect all measurements.
• Systematic errors are minimized with more measurements, while random errors are not.

How can random errors be minimized in experiments?

• By using more accurate instruments.
• By measuring only once.
• By recalibrating instruments
• By increasing the number of measurements

Which of the following best describes absolute error?

• It is the total error across all measurements.
• It is the ratio between measured and true values.
• It is the difference between the measured value and the true or accepted value.
• It is a type of systematic error

In polar coordinates, the angle θ is calculated using which formula?

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When converting Cartesian coordinates to polar coordinates, which situation would result in an undefined angle θ?

• When x=0
• When x=0 and y =0
• When y=0
• When x and y are non zero

Given a point at Cartesian coordinates (-6, 8), what is the approximate value of the radius r in polar coordinates?

• 14
• 10
• 8
• 7

Which fundamental force has an infinite range but is the weakest of the four?

• Gravitational force
• Electromagnetic force
• Strong nuclear force
• Weak nuclear force

Which force is responsible for holding the atomic nucleus together?

• Gravitational force
• Electromagnetic force
• Strong nuclear force
• Weak nuclear force

The weak nuclear force plays a crucial role in which of the following processes?

• Orbital motion of planets
• Radioactive decay, such as beta decay
• Attraction between charged particles
• Binding electrons in atoms