What is an error?

The scale on a steel meter stick is calibrated at 15^@ C . What is the error in the reading of 60 cm at 27^@C ? alpha_(steel) =1.2 xx 10^-5 (.^@ C)^-1 .

Two objects A and B are of lengths 5 cm and 7cm determined with errors 0.1 cm and 0.2 cm respectively.What is the error in determing (a) the total length and (b) the difference in their lengths?

A battery of emf 1.4 V and internal resistance 2 Omega is connected to a resistor of 100 omega resistance through an ammeter. This resistance of the ammeter is 4//3 Omega . A voltmeter has also been connected to find the potential difference across the resistor. a. Draw the circuit diagram. b. The ammeter reads 0.02 A . What is the resistance of the voltmeter? c. The voltmeter reads 1.1 V . What is the error in the reading?

A line segment of length 7.5 cm was wrongly measured as 7.2 cm. What was the error per cent ?

The currect voltage relation of diode is given by I=(e^(1000 V//T)-1) mA , where the applied voltage V is in volt and the temperature T is in degree Kelvin. If a student makes an error measuring +-0.01 V while measuring the current of 5 mA at 300 K , what will be error in the value of current in mA?

In resonance tube exp we find l_(1) = 25.0 cm and l_(2) = 75.0cm The least count of the scale used to measure l is 0.1cm If there is no error in frequency What will be max permissible error in speed of sound (take f_(0) = 325 Hz) .