GATE EE 2018 | GATE EE Year Wise Previous Years Questions

GATE EE 2018

MCQ (Single Correct Answer)

-0.67

A 0-1 Ampere moving iron ammeter has an internal resistance of 50 m$$\Omega $$ and inductance of 0.1 mH. A shunt coil is connected to extend its range to 0-10 Ampere for all operating frequencies. The time constant in milliseconds and resistance in m$$\Omega $$ of the shunt coil respectively are

2, 5.55

2, 1

2.18, 0.55

11.1, 2

GATE EE 2018

MCQ (Single Correct Answer)

-0.33

Two wattmeter method is used for measurement of power in a balanced three-phase load supplied from a balanced three-phase system. If one of the wattmeters reads half of the other (both positive), then the power factor of the load is

0.532

0.632

0.707

0.866

GATE EE 2018

MCQ (Single Correct Answer)

-0.3

A single-phase 100 kVA, 1000 V / 100 V, 50 Hz transformer has a voltage drop of 5% across its series impedance at full load. Of this, 3% is due to resistance. The percentage regulation of the transformer at full load with 0.8 lagging power factor is

4.8

6.8

8.8

10.8

GATE EE 2018

MCQ (Single Correct Answer)

-0.6

A transformer with toroidal core of permeability $$\mu $$ is shown in the figure. Assuming uniform flux density across the circular core cross-section of radius r $$ \ll $$ R, and neglecting any leakage flux, the best estimate for the mean radius R is GATE EE 2018 Electrical Machines - Transformers Question 4 English

GATE EE 2018 Electrical Machines - Transformers Question 4 English

$${{\mu V{r^2}N_P^2\omega } \over I}$$

$${{\mu I{r^2}{N_P}{N_S}\omega } \over V}$$

$${{\mu V{r^2}N_P^2\omega } \over {2I}}$$

$${{\mu V{r^2}N_P^2\omega } \over {2V}}$$

GATE EE Papers

2023