# Electromagnetics [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 53 - 57 of 96

Access detailed explanations (illustrated with images and videos) to **1176** questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. *Unlimited Access, Unlimited Time, on Unlimited Devices*!

View Sample Explanation or View Features.

Rs. 450.00 -OR-

How to register? Already Subscribed?

## Question 53

### Question

MCQ▾The field in a rectangular waveguide of inner dimensions is given by

Where is a constant, a and b are the dimensions along the and the respectively. The mode of propagation in the waveguide is

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 54

### Question

MCQ▾The phase velocity of an electrometric wave propagating in a hollow metallic rectangular waveguide in the mode is

### Choices

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

a. | Equal to its group velocity | |

b. | Less than velocity of light in free space | |

c. | Equal to the velocity of light in free space | |

d. | Greater than the velocity of light in free space |

## Question 55

### Question

MCQ▾The longitudinal component of the magnetic field inside an air filled rectangular waveguide made of a perfect electric conductor is given by the following expression

The cross – sectional dimensions of the waveguide are given as and . The mode of propagation inside the waveguide is

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 56

### Question

MCQ▾The phase velocity for the mode in an air filled rectangular waveguide is

### Choices

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

a. | Less than c | |

b. | Equal to c | |

c. | Greater than c | |

d. | None of the above |

## Question 57

### Question

MCQ▾Indicate which one of the following modes do NOT exist in a rectangular resonant cavity

### Choices

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

a. | ||

b. | ||

c. | ||

d. |