# Exam Questions Papers Online Exam Quiz

Important questions about Exam Questions Papers. Exam Questions Papers MCQ questions with answers. Exam Questions Papers exam questions and answers for students and interviews.

Options

A : 0

B : 0.5

C : 2

D : infinity

Options

A : 30 dB

B : 46.91 dB

C : 40 dB

D : 49.92 dB

### 3. In a semiconductor material. The hole concentration is found to be 2 x 2.5 x 10 15 cm -3 . If mobility of carriers is 0.13 m 2 / v-s . Then find the current density if electric field intensity is 3.62 x 10 -19

Options

A : 7.6237 x 10 -4 A/ cm 2

B : 7.6237 x 10 -5 A/ cm 2

C : 7.6237 x 10 -3 A/ cm 2

D : none of these

Options

A : 300 H z

B : 360 H z

C : 600 H z

D : 480 H z

Options

A : 10 GH z

B : 1 GH z

C : 15 GH z

D : 25 GH z

Options

A : 12000 bps

B : 10000 bps

C : 6000 bps

D : 3000 bps

### 7. Radiation resistance of an antenna is 54 ? and loss resistance is 6 ?. If antenna has power gain of 10, then directivity is:

Options

A : 9

B : 11.11

C : data not sufficient

D : 10

Options

A : zero

B : K

C : 1/K

D : infinite

### 9. When phase-lag compensation is used in a system, then gain cross over frequency, bandwidth and undamped frequency are respectively

Options

A : Increased, Increased, Increased

B : Increased, Increased, Decreased

C : Increased, Decreased, Decreased

D : Decreased, Decreased, Decreased

Options

A : 0.6698

B : 0.7698

C : 0.503

D : 0.6598

### 1. The equivalent form of the logical expression A B C + A B C + ABC + AB C + A B C is

Options

A : C + (A ? B)

B : ( A + B + C)(A + B + C)

C : (A + B + C)( A + B + C)(A + B + C)

D : (A + B + C)( A + B + C )(A + B + C )

### 2. An air-filled rectangular waveguide has dimensions 8 cm x 10 cm . The phase velocity of guided wave at frequency of 3 GH z for TE 10 mode is

Options

A : 1.5 x 10 8 m/s

B : 5.5 x 10 8 m/s

C : 3.46 x 10 8 m/s

D : 0.18 x 10 7 m/s

### 3. If x[n] then the sequence x[n] is

Options

A : non-periodic

B : periodic

C : depends on n

D : none of these

### 6. In a flash type ADC, employing 15 comparators resolution with 10 volts reference; is expected to be :

Options

A : 0.625 V

B : 0.656 V

C : 0.525 V

D : insufficient data

### 7. Consider the system with and where p and q are arbitrary real numbers. Which of the following statements about the controllability of the system is true?

Options

A : The system is completely state controllable for any non zero values p and q

B : Only p = 0 and q = 0 result in controllability

C : The system is uncontrollable for all values of p and q

D : We cannot conclude about controllability from the given data

Options

A : 32 K?

B : 16 K?

C : 8 K?

D : 4 K?

### 9. For a = - 1, find the value of V 2

Options

A : ?

B : 0

C : V 1

D : none of the above

Options

A : 8.95 e V

B : -8.95 e V

C : 7.326 e V

D : -7.326 e V

### 1. As the temperature increases the mobility of electrons __________ .

Options

A : decreases because the number of carries increases with increased collisions

B : increases because the number of carries decreases with decreased collisions

C : remains same

D : none of the above

Options

A : V -1

B : em.V -1

C : V.cm -1

D : V. s