A (0 - 40)A ammeter has a guaranteed accuracy error of 2% of the full scale reading. If the current measured by this instrument is 10 A, the value of relative limiting error in percentage will be

Q. A 0 - 10 A ammeter has a guaranted accuracy of 1.5% of full scale reading. The current measured by the instrument is 2.5 A. The percentage limiting error in the measurement is $\pm$ ________ %

Q. A voltmeter having reading of 70 V on its 100 V range and an ammeter having reading of 80 mA on its 150 mA range are used to determine power dissipation in a resistor. Both these instruments are guaranteed to be accurate within $\pm 2\%$ at full scale deflection. The limiting error (in percentage) in power measuement is _______

Q. A variable w is related to three other variables $x,y,z$ as $w=xy/z$. The variables are measured with meters of accuracy $\pm 0.5$% reading, $\pm 1$% of full scale value and $\pm 1.5$% reading . The actual readings of the three meters are 80, 20 and 50 with 100 being the full scale value for all three. The maximum limiting error in the measurement of $w$ will be

Q. The density of a solid ball is to be determined in an experiment. The diameter of the ball is measured with a screw gauge, whose pitch is $0.5mm$ and there are $50$ divisions on the circular scale. The reading on the main scale is $2.5mm$ and that on the circular scale is $20$ divisions. If the measured mass of the ball has a relative error of $2\%$, then the relative percentage error in the density is:

Q. Four students measured the reading by observing the position of pointer on the ammeter scale as shown below:



Assuming that the ammeter has no zero error, the correct reading is :
(1) 1.25 A
(2) 1.30 A
(3) 1.15 A
(4) 1.1 A