Electrical Engg (EEE) - MCQ Practice Questions

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

Which bridge circuit is most suitable for measuring an unknown capacitance?

In a Wheat stone bridge, the null deflection is obtained when the ratio of resistances satisfies which condition?

A moving iron instrument reads the same for both AC and DC because it:

A thermocouple is used to measure temperature because it:

The mutual inductance between two coils is independent of:

A platinum resistance thermometer (RTD) follows which relationship between resistance and temperature?

A Hall effect sensor is primarily used to measure:

The power factor of a circuit can be improved by adding:

The null deflection method in bridge circuits is preferred over deflection method because it:

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?

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?

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?

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

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?

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

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?