Explanation: The maximum input voltage has to be ≤ ±14v, to obtain the maximum full scale input voltage of 13v. 6. Higher input voltage can be measured in low voltage DC voltmeter using
A. Smaller resistance value
B. Higher resistance value
C. Random resistance value
D. All of the mentioned
Answer:A
Explanation: The maximum input voltage has to be ≤ ±14v, to obtain the maximum full scale input voltage of 13v. 6. Higher input voltage can be measured in low voltage DC voltmeter using
A. Smaller resistance value B. Higher resistance value C. Random resistance value D. All of the mentioned
Explanation: Higher resistance values are required to measure relatively higher input voltage. For example, if the range of switch is at x10 position in the low voltage dc voltmeter then, the corresponding resistance value would be 10kΩ. So, it requires a 10v input to get a full scale deflection (if 1v cause full scale deflection in the ammeter with a full scale deflection of 1mA). 7. In the diagram given below, determine the deflection of the ammeter with a full scale deflection of 1mA when the switch is at X2kΩ. Consider resistance of the offset voltage compensating network to be 10Ω.