GATE 2024 Electrical & Electronic Measurements Foundation Quiz 58

A PMMC voltmeter give full scale deflection of 240° for a DC voltage of 10 V. What will be the voltage (in Volts) indicated by the meter for a deflection of ?

For full wave rectifier circuit, DC sensitivity is 1000 Ω/volts. What is the value of multiplier resistance (in kΩ) if input voltage is 20 V (rms), meter resistance = 250Ω? (diode resistance is negligible)

Consider the circuit shown below:

where A is Ammeter, V is Voltmeter and R is unknown resistor. The voltage sensitivity is given as 1 × 10³ Ω/Volts. The voltmeter scale is 150 V, and its reading is 80 V. Consider a case when ammeter reading is 10^–2 A and neglect the resistance of ammeter. Choose the correct option(s) among the following:

A moving coil ammeter has a moving coil of dimensions 20 mm × 15 mm with 150 turns. If a current of 4 mA is applied to the coil, find the angular deflection (in degree) of the pointer. The flux density in the air gap is 1.6 × 10^-3 Wb/m² and the spring constant is 0.46 × 10^-6 Nm/rad.

A (0 – 50) moving coil ammeter has a voltage drop of 0.1 V across its terminals at full scale deflection. The external shunt resistance (in milliohms) needed to extend it range (0 – 500 A) is ________.