Electrical Engg (EEE) - MCQ Practice Questions

A moving coil galvanometer has an internal resistance of 10 Ω and a full-scale deflection current of 5 mA. What shunt resistance is required to convert it into an ammeter with a range of 0-5 A?

Which of the following is NOT a source of error in analog voltmeters?

In a Kelvin's double bridge used for measuring low resistances (< 0.1 Ω), which configuration is adopted?

A thermocouple generates 50 μV for a temperature difference of 1°C between its junctions. What is its sensitivity?

A wattmeter with voltage coil rating of 300 V and current coil rating of 5 A is used to measure power in a circuit. If the actual voltage is 250 V and current is 4 A at power factor 0.8, what will be the wattmeter reading if it has full-scale deflection of 1500 W?

In a CRO probe with 10:1 attenuation ratio, if the actual voltage is 100 V, what voltage appears across the CRO input terminals?

Which method is most suitable for measuring frequency in the range of 10 Hz to 100 kHz with high accuracy in 2024-25 standards?

An AC bridge circuit is used to measure unknown capacitance. At balance, the product of opposite arms satisfies which condition?

What is the primary advantage of a digital multimeter over an analog multimeter in industrial measurements?

In a megohmmeter, what voltage is typically applied across the test terminals to measure very high resistances (> 1 MΩ)?

A strain gauge has gauge factor of 2.1 and resistance change of 5 Ω for a strain of 0.001. What is the original resistance of the gauge?

In a three-phase power measurement using two-wattmeter method, the power factor can be determined from which relationship?

A standard cell has an EMF of 1.0186 V at 20°C with temperature coefficient of -0.0004 V/°C. What will be its EMF at 25°C?

Which bridge circuit is specifically designed to measure inductance with small resistance?

In a LVDT (Linear Variable Differential Transformer), when the core is at null position, what happens to the output voltage?

A pressure transducer has sensitivity of 0.5 V/bar. If input pressure varies from 0-10 bar, what is the output voltage range?

In a potentiometer method for EMF comparison, if standard cell EMF is 1.018 V with 106.4 cm length, and unknown cell requires 107.8 cm, what is unknown EMF?

What is the main limitation of analog instruments in automated data acquisition systems?

In a Wheatstone bridge for resistance measurement, if R₁ = 100 Ω, R₂ = 50 Ω, R₃ = 200 Ω, what should be R₄ for balance?

A light intensity meter using a photocell shows reading of 500 lux. If the luminous intensity of the source is constant, what happens to the reading when distance is doubled?