GATE EE 2000 | Transformers Question 76 | Electrical Machines

GATE EE 2000

MCQ (Single Correct Answer)

-0.3

If an ac voltage wave is corrupted with an arbitrary number of harmonics, then the overall voltage waveform differs from its fundamental frequency component in terms of

only the peak values

only the rms values

only the average values

all the three measures (peak, rms and average values)

GATE EE 1998

MCQ (Single Correct Answer)

-0.3

The magnetizing current in a transformer is rich in

3^rd harmonic

5^th harmonic

7^th harmonic

13^th harmonic

GATE EE 1998

MCQ (Single Correct Answer)

-0.3

The efficiency of a 100 kVA transform is 0.98 at full as well as at half load. For this transformer at full load the copper loss.

is less than core loss

is equal to core loss

is more than core loss

none of the above

GATE EE 1998

MCQ (Single Correct Answer)

-0.3

The laws of electromagnetic induction (Faraday's and Lenz's law) are summarized in the following equation:

e = iR

$$\mathrm e\;=\;\mathrm L\frac{\operatorname d\mathrm i}{\operatorname d\mathrm t}$$

$$\mathrm e\;=\;-\frac{\operatorname d\mathrm\psi}{\operatorname d\mathrm t}$$

none of these

PREVIOUS NEXT

GATE EE Subjects

Browse all chapters by subject

Electric Circuits

Network Elements Transient Response Two Port Networks Sinusoidal Steady State Analysis Network Theorems Three Phase Circuits Graph Theory

Electrical Machines

Synchronous Machines Transformers D.C Machines Induction Machines

Engineering Mathematics

Vector Calculus Calculus Transform Theory Probability and Statistics Differential Equations Linear Algebra Numerical Methods Complex Variable

Signals and Systems

Continuous Time Signal Fourier Transform Miscellaneous Discrete Time Signal Z Transformation Continuous Time Periodic Signal Fourier Series Continuous and Discrete Time Signals Continuous Time Signal Laplace Transform Linear Time Invariant Systems Sampling Theorem

Power Electronics

Choppers and Commutation Techniques Single and Three Phase Rectifier Power Semiconductor Devices Ac Voltage Controllers Inverters

Power System Analysis

Parameters and Performance of Transmission Lines Power Generation Cost Power System Stability Symmetrical Components and Symmetrical and Unsymmetrical Faults Circuit Breaker Switch Gear and Protection Per Unit System Load Flow Studies High Voltage Dc Transmission Generating Power Station

Digital Electronics

Boolean Algebra Logic Gates Combinational Circuits Minimization Logic Families and Memories Sequential Circuits Analog to Digital and Digital to Analog Converter Microprocessor

Analog Electronics

Diode Circuits and Applications Bjt and Mosfet Biasing Small Signal Modeling Feedback Amplifiers and Oscillator Circuits Operational Amplifier Frequency Response 555 Timer

Electromagnetic Fields

Time Varying Fields Electrostatics Magnetostatics

Control Systems

Controller and Compensator Root Locus Techniques Polar Nyquist and Bode Plot State Variable Analysis Basics of Control System Time Response Analysis Routh Hurwitz Stability Block Diagram and Signal Flow Graph

Electrical and Electronics Measurement

Potentiometer and Instrument Transformers Measurement of Resistance and A.C Bridges Measurement of Energy and Power Cathode Ray Oscilloscope Digital Voltmeters Questions Basic of Indicating Instruments Error Analysis and Measurement

General Aptitude

Verbal Ability Logical Reasoning Numerical Ability