# Engineering Mathematics [GATE (Graduate Aptitude Test in Engineering) Electrical Engineering]: Questions 153 - 157 of 169

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## Question 153

Appeared in Year: *2019*

### Question

MCQ▾A six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current is

### Choices

Choice (4) | Response | |
---|---|---|

a. | 300 Hz | |

b. | 250 Hz | |

c. | 150 Hz | |

d. | 100 Hz |

## Question 154

Appeared in Year: *2020*

### Question

Numeric Answer▾Consider the initial value problem below. The value of y at x = ln 2, (rounded off to 3 decimal places) is ________.

## Question 155

Appeared in Year: *2018*

### Question

MCQ▾The value of the integral in counter clockwise direction around a circle C of radius 1 with center at the point is

### Choices

Choice (4) | Response | |
---|---|---|

a. | ||

b. | ||

c. | ||

d. |

## Question 156

Appeared in Year: *2021*

### Question

MCQ▾In a single-phase transformer, the total iron loss is 2500 W at nominal voltage of 440 V and frequency 50 Hz. The total iron loss is 850 W at 220 V and 25 Hz. Then, at nominal voltage and frequency, the hysteresis loss and eddy current loss respectively are:

### Choices

Choice (4) | Response | |
---|---|---|

a. | 600 W and 250 W | |

b. | 1600 W and 900 W | |

c. | 250 W and 600 W | |

d. | 900 W and 1600 W |

## Question 157

Appeared in Year: *2019*

### Question

Numeric Answer▾The voltage across and the current through a load are expressed as follows

The average power in watts (round off to one decimal place) consumed by the load is ________.