# Isotropic Radiators Online Exam Quiz

Isotropic Radiators GK Quiz. Question and Answers related to Isotropic Radiators. MCQ (Multiple Choice Questions with answers about Isotropic Radiators

### The radiation efficiency value is __

**Options**

A : 0

B : 1<?<?

C : 0???1

D : ?

### The ratio of power radiated in a particular direction to the total input power of antenna is called as ___

**Options**

A : Directive gain

B : Power gain

C : Directivity

D : Partial directivity

### The value of maximum power gain is always greater than or equal to the maximum directive gain.

**Options**

A : TRUE

B : FALSE

C : -

D : -

### What is the maximum power gain of antenna with radiation efficiency 98% and directive gain 1?

**Options**

A : 0.98

B : 1.02

C : 1.98

D : 1

### What is the maximum power gain when the radiation resistance is 72?, loss resistance is 8? and the maximum directive gain is 1.5?

**Options**

A : 1.15

B : 1.35

C : 1.25

D : 1.53

### Which of the following expression is correct for radiation efficiency?

**Options**

A : \eta_r = \frac{P_r}{P_l}

B : \eta_r = \frac{P_r}{P_r-P_l}

C : \eta_r = \frac{P_r}{P_r+P_l}

D : \eta_r = \frac{P_l}{P_r+P_l}

### Which of the following represents the relation between maximum power gain and maximum directivity gain of the antenna?

**Options**

A : Gpmax = ?rGdmax

B : Gpmax = ?r/Gdmax

C : ?r = \sqrt{(G_{pmax} G_{dmax})}

D : ?r = \frac{G_{dmax}+G_{pmax}}{G_{dmax}-G_{pmax}}