Download Quiz No.2 ECE 48

ECE48:INSTRUMENTATION 1
QUIZ No. 2
1. Describe briefly the principle of operation of d'Arsonval meter movement.
2. How can d'Arsonval meter be used to measure:
a. Current
b. Voltage
c. Resistance
3. Calculate the voltage drop developed across d'Arsonval meter movement having
an internal resistance of 600Ω and a full-scale deflection current of 100µA.
4.
Find the resistance of multiplier required to convert a 200µA meter movement
into a 0 to 150Vdc voltmeter, if Rm = 1kΩ.
5. Calculate the half-scale current of a meter movement that has a sensitivity of
20kΩ/V.
6. Calculate the value of resistors R1 through R5 in the circuit shown below.
ECE48:INSTRUMENTATION 2
QUIZ No. 2
7. Calculate the value of resistors R1 through R3 in the circuit shown in the figure.
8. In the circuit of the figure shown, a voltmeter A having a sensitivity of 5kΩ/V is
connected to points X and Y and indicates 15V on its 30-V range. A voltmeter B is
then connected to points X and Y and indicates 16.13V on its 50-V range.
a.
Find the sensitivity of voltmeter B.
b.
If R = 40KΩ calculate the error due to voltmeter loading for both meters.