Electrical Engg (EEE) - MCQ Practice Questions

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?

Which of the following is a sequential logic circuit?

In a JK flip-flop, when J=1 and K=1, the next state will be:

What is the fan-out of a logic gate?

Which digital logic family has the highest speed of operation?

The number of logic levels required to represent 32 different states in binary is:

What is the main advantage of CMOS logic over TTL?

A 4-to-1 multiplexer has inputs A, B, C, D and select lines S₁, S₀. If S₁=0 and S₀=1, which input is selected?

In Karnaugh map simplification, a group of 8 adjacent cells eliminates how many variables?

What is the primary function of an encoder in digital electronics?