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Electrical and Electronics Measurement...

Exams

GATE IN

Years

2021

Subjects

Electrical and Electronics Measurements

Topics

Power Factors
AC Steady-State Analysis of Series RL Circuits
Basic Circuit Laws - Electric Potential and Work Done
Bridge Methods for Resistance Measurement (Kelvin Double Bridge)
Bridges and Potentiometers
CRO and Lissajous Patterns
Current Transformer
Current and power in single and three phase circuits
Digital Voltmeters
Error Analysis and Uncertainty Propagation
Frequency Measurement using Digital Counters
Measurement of voltage
SI Units and Measurement Standards
Timers and counters
Transformer Testing (Open Circuit Test)
Transformers and Impedance Referral
Wheatstone Bridge

List of top Electrical and Electronics Measurements Questions on Power Factors asked in GATE IN

A 300 V, 5 A, LPF wattmeter has a full scale of 300 W. The wattmeter can be used for loads supplied by 300 V ac mains with a maximum power factor of \(\underline{\hspace{2cm}}\) (rounded off to one decimal place).

GATE IN - 2021
GATE IN
Electrical and Electronics Measurements
Power Factors

In an ac main, the rms voltage \( V_{ac} \), rms current \( I_{ac} \) and power \( W_{ac} \) are measured as:
\( V_{ac} = 100 \, \text{V} \pm 1% \), \( I_{ac} = 1 \, \text{A} \pm 1% \), \( W_{ac} = 50 \, \text{W} \pm 2% \)
The percentage error in calculating the power factor using these readings is

GATE IN - 2021
GATE IN
Electrical and Electronics Measurements
Power Factors