# Basics Online Exam Quiz

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

### Directive gain is defined as a measure of concentration of power in a particular direction.

**Options**

A : TRUE

B : FALSE

C : -

D : -

### Directive gain of antenna when radiation intensity is 5W/Steradian and radiated power 5W is __

**Options**

A : 4?

B : 1/4?

C : 25

D : 1

### Equivalent circuit representation of an antenna is __

**Options**

A : Series R, L, C

B : Parallel R, L, C

C : Series R, L parallel to C

D : Parallel R, C series to L

### For an isotropic antenna, the average power Pav can be expressed in terms of radiated power Pr as __

**Options**

A : Pav=Pr/4?

B : Pav=Pr/2?r2

C : Pav=Pr/2?

D : Pav=Pr/4?r2

### Radiation resistance of a half-wave dipole is __

**Options**

A : 36.56?

B : 18.28?

C : 73.12?

D : 40.24?

### Radiation resistance of a Hertzian dipole of length ?/8 is __

**Options**

A : 12.33?

B : 8.54?

C : 10.56?

D : 13.22?

### Relation between directivity and effective area of transmitting and receiving antenna is __

**Options**

A : Dt At=Dr Ar

B : Dt Ar=Dr At

C : At Dt=?Dr Ar

D : Dt At=?Dr Ar

### The axis of back lobe makes an angle of 180? with respect to the beam of an antenna.

**Options**

A : TRUE

B : FALSE

C : -

D : -

### The Directive gain is __ on input power to antenna and ___ on power due to ohmic losses.

**Options**

A : Independent, independent

B : Dependent, independent

C : Independent, dependent

D : Dependent, dependent

### The equivalent area when multiplied by the instant power density which leads to free radiation of power at antenna is called as ___

**Options**

A : Loss area

B : Scattering area

C : Captured area

D : Effective area