Measurements and their errors

Q1.

A student measured the diameter of a uniform cylinder using vernier callipers. The table given below shows the calliper measurements made by the student. Calculate the percentage uncertainty in the measured diameter, in 3 sf.

44.5, 39.2, 40.9, 36.4, 38.0

1. 9.18%
2. 11.4%
3. 10.3%
4. 10.2%

Q2.

Which of the following types of errors typically follow Normal distribution?

1. Systematic errors
2. Random errors

Q3.

Which of the following apparatus would be most suitable for investigating the relationship between the diameter of a wire and its resistance?

1. Voltmeter and ammeter
2. Newton meter
3. Micrometer screw gauge
4. Metre ruler

Q4.

Zero Error is an example of which of the following types of errors?

1. Statistical error
2. Systematic error
3. Random error

Q5.

The effect of which of the following types of errors can be minimized by repeating the experiment multiple times and taking the average of the values recorded?

1. Random errors
2. Systematic errors

Q6.

You are using a signal generator and an Oscilloscope in an experiment. You have configured the signal generator to generate a sine-ware signal. Which control on the oscilloscope would you use to centre the trace of the Oscilloscope vertically?

1. X-shift
2. Y-shift
3. Y-gain

Q7.

In an experiment, you have a pin connected to a spring, which is suspended vertically from a fixed support. The pin itself is oriented horizontally. Your objective is to measure the extension produced in the spring when varying degrees of force are applied to its free end. To do this, you've set up a ruler behind the pin to measure the change in the length of the spring.

What steps can you take to ensure that no parallax error is introduced when taking readings on the ruler and the pin?

1. use a pin with a thick diameter
2. use a pin with a thin diameter
3. use a mirror behind the ruler
4. none of the above will help

Q8.

For which of the following types of errors, do measurements throughout the range differ equally?

1. Random errors
2. Systematic errors

Subject: Physics

Level: Beginner