Physics Quiz Slide Unit 1

What is the definition of error in the context of measurements?

• The value obtained after multiple measurements

• The difference between the measured values of a quantity and its true values

• The highest measured value

• The average of all measured values

Which type of error is caused by human mistakes?

• Instrumental error

• Gross / Human error

• Random error

• Systematic error

How can instrumental errors be avoided?

• Using arrangements to keep surrounding conditions constant

• Calibrating the instrument carefully against the standard

• Reducing the effect of dust and humidity

• Selecting a proper instrument and planning the proper procedure

What is the formula to calculate random error?

• E = (Measured Value - Actual Value) * Actual Value

• E = Measured Value - Actual Value

• E = Measured Value / Actual Value

• E = (Measured Value - Actual Value) / Actual Value

Which type of error is caused by instruments imperfection?

• Environmental error

• Gross / Human error

• Systematic error

• Random error

What is the purpose of dimensional analysis in physics?

• To measure the gravitational acceleration

• To determine the absolute error

• To express physical quantities in terms of basic quantities

• To calculate the percentage error

Which type of quantity has both magnitude and direction?

• Systematic quantity

• Random quantity

• Vector quantity

• Scalar quantity

What is the SI unit for mass?

• Gram

• Kilogram

• Pound

• Newton

How can human errors be minimized in measurements?

• Recording the reading carelessly

• Depending on only one reading

• Neglecting loading effects

• Taking great care while taking the reading

What is the formula to calculate percentage error?

• Percentage Error = (Measured Value - Actual Value) * Actual Value

• Percentage Error = (Measured Value / Actual Value) - 100%

• Percentage Error = (Measured Value - Actual Value) / Actual Value

• Percentage Error = (Measured Value / Actual Value) * 100%