Errors in Measurement

What is meant by Instrumental error?

What are the causes of personal error?

Define imperfection in experimental technique or procedure.

What is instrumental error with example?

Estimate the uncertainty when a girl measures the temperature of a bath of water using the thermometer in Figure.

Estimate the uncertainty when a student measures the length of a room using a steel tape measure calibrated in millimetres.

State whether true or false. If false, correct the statement.
With the help of vernier caliper, we can have an accuracy of $0.1 \mathrm{mm}$ and with screw gauge we can have an accuracy of $0.01 \mathrm{mm}$.

For parallel resistors in an electrical circuit, the total resistance R is given by the formula, $\frac{1}{R}=\frac{1}{R_1}+\frac{1}{R_2}$. $R_1=7.2 Ohm$, measured to the nearest tenth and $R_2=3.6 Ohm$, also measured to the nearest tenth.

If the actual total resistance is $2.40 Ohm,$ find the range of percentage error in R.

A Mathematics student approximates the value of $\pi$ with $\frac{355}{113}$. Percentage error on assuming this value is $\left(a.0225261\times {10}^{-2}\right)\%$. Find $a$.

A rectangular pool measures $7.5m by 15m$. Vasil measures the diagonal to be $16m$.

Find the percentage error in his measurement. Give your answer to three significant figure.

In an experiment time period of a simple pendulum are measured as $2.63 \mathrm{s},2.56 \mathrm{s}$, $2.71 \mathrm{s},2.80 \mathrm{s}$. Find average absolute error and the percentage error.

If the error in the measurement of radius of a sphere is $1\%$, the error in the measurement of volume will be

The temperature of a metal coin is increased by $100°\mathrm{C}$ and its diameter increases by $0.15\%.$ Its area increases by nearly

The length and width of a rectangular room are measured to be $3.95\pm 0.05 \mathrm{m}$ and $3.05\pm 0.05 \mathrm{m}$, respectively. The area of the floor is

To calculate the effective length of pendulum, we measure :-

Closeness of two or more measured values is called as

The pitch of a screw gauge is $0.5 \mathrm{mm}$ and its head scale has $50$ divisions. The least count of the screw gauge is:

The temperature of a metal coin is increased by $100°\mathrm{C}$ and its diameter increases by $0.15\%.$ Its area increases by nearly

The most precise measurement among the following is 

The pitch of a screw gauge is $0.5 \mathrm{mm}$ and its head scale has $50$ divisions. The least count of the screw gauge is: