# The Q factor or of a coil at the resonant frequency 1. 5 MHz Of an RLC series circuit is 150. The bandwidth will be

1.  225 MHZ

2.  1.06 MHz

3.  10 kHz

4.  none of these

4

10 kHz

Explanation :
No Explanation available for this question

# The resonant frequency of an RLC series circuit is 1.5 MHz with the tithing capacitor set at 150 pf The bandwidth is 10 kHz. The effective resistance of the circuit is

1.  29.5Ω

2.  14.75Ω

3.  9.4Ω

4.  4.7Ω

4

4.7Ω

Explanation :
No Explanation available for this question

# In a Q meter, distributed capacitance of coil is measured by changing the capacitance of the tuning capacitor. The values of tuning capacitor are C1 and C2 for resonant frequencies f1 and 2 f1 respectively. The value of distributed capacitance is

1.  C1 - C2/2

2.  C1 - 2C2/3

3.  C1 - 4C2/3

4.  C1 - 3C2/2

4

C1 - 4C2/3

Explanation :
No Explanation available for this question

# The true value of Q of a coil is 245 and the measured value of 244.5. The ratio of distributed capacitance to self capacitance of the coil is

1.  2.04 x10-3

2.  1.002

3.  0.997

4.  none of these

4

2.04 x10-3

Explanation :
No Explanation available for this question

# A photo voltaic cell is connected across a very large value of resistance, its sensitivity at higher illumination levels is typical

1.  infinity

2.  zero

3.  some finite value which is very large

4.  some finite value which is very small and nears zero

4

some finite value which is very small and nears zero

Explanation :
No Explanation available for this question

# Which of the following photo-electric devices is most suitable for digital applications

1.  Photo-emissive cell

2.  Photo diode

3.  Photo transistor

4.  Photo voltaic cell

4

Photo voltaic cell

Explanation :
No Explanation available for this question

# If an information is required to be stored over a short interval of time

1.  a single number devices should be used

2.  a storage type oscilloscope should be used

3.  a CRO with photographic equipment should be used

4.  a direct writing recorder or a magnetic tape recorder should be used

4

a direct writing recorder or a magnetic tape recorder should be used

Explanation :
No Explanation available for this question

# Digital instruments have input impedance of the order of

1.  1Ω

2.  kΩ

3.  MΩ

4.  mΩ

4

Explanation :
No Explanation available for this question

# A Vertical amplifier for a CRO can be designed for

1.  only a high gain

3.  a constant gain times band-width product

4.  all of these

4

a constant gain times band-width product

Explanation :
No Explanation available for this question

# On an oscilloscope, the Lissajous pattern of eight keeps on changing the shape when the ratio of frequencies is

1.  not exactly 1.: 1

2.  not exactly 2 : 1

3.  exactly 3 : 1

4.  exactly 4 : 1

4