Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | Which antenna is frequently used for local area transmission at UHF/VHF? |

A. | Ground monopole [Correct Answer] |

B. | Turnstile antenna [Wrong Answer] |

C. | Slot antenna [Wrong Answer] |

D. | Loop antenna [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ In a bipolar transistor which current is smallest

collector current

base current

emitter current

any of the three currents

⇒ When a

*p*-

*n*-

*p*transistor is operating in active region, the current in the

*n*region is due to

only holes

only electrons

mainly holes

mainly electrons

⇒ With respect to the following 555 timer circuit what will be the value of R

_{A}and R such that the LED turns on for a duration of 10

*ms*every time it receives negative trigger pulse. LED operating current = 20

*m*A, V

_{f}= 1.4 V, V

*o*

_{on}= 13.4 V and C = 0.22

*nf*

41.4 KΩ, 600 Ω

45 KΩ, 630 Ω

43.5 KΩ, 580 Ω

44.9 KΩ, 600 Ω

41.4 KΩ, 600 Ω

45 KΩ, 630 Ω

43.5 KΩ, 580 Ω

44.9 KΩ, 600 Ω

⇒ The resistance in the circuit of the moving coil of a dynamometer wattmeter should be

very low

low

high

almost zero

⇒ A single phase half wave rectifier is feeding a resistive load. As firing angle is increased

dc output voltage and rms output voltage decrease in the same proportion

dc output voltage and rms output voltage decrease

dc output voltage and rms output voltage increase

dc output voltage and rms output voltage increase in the same proportion

⇒ The widely used binary multiplication method is

repeated addition

add and shift

shift and add

any of the above

⇒ The satellites used for intercontinental communication are called

Comsat

Domsat

Marisat

Intelsat

⇒ If A = 629 ± 8 and B = 131 ± 3, A - B with range of doubt is

498 ± 8

498 ± 4

498 ± 11

498 ± 13

⇒ In 2 out of 5 code, decimal number 8 is

11000

10100

11000

1010

⇒ Which of the following is used in lightning arresters?

Thermistor

Photoconductor

Transistor

Varistor

⇒ Thevenin's equivalent circuit

can be drawn only in time domain

can be drawn only in frequency domain

can be drawn both in time and frequency domain

can be drawn in frequency domain with some restrictions

⇒ Which of the following parameters is negligible in transmission lines?

R

L

C

G

⇒ In LED the radiation is in

visible region

infrared region

both (a) and (b)

neither (a) nor (b)

⇒ Figure shows an RC circuit. The magnitude plot V

⇒ The circuit in the given figur

low pass filter

high pass filter

band Pass filter

band reject filter

⇒ In an LC filter, the ripple factor,

increases with load current

increases with load resistance

remains constant with the load current

has the lowest value

⇒ The reverse saturation current of a diode does not depend on temperature.

TRUE

FALSE

⇒ By the use of which of the following the PPM can be converted to PWM?

A stable multivibrator

Integrator

Monostable multivibrator

Bistable Multivibrator

⇒ Mesh analysis is applicable __________ only.

planar network

non planar network

a circuit which contains only current sources

none

⇒ In a common emitter BJT amplifier, the maximum usable supply voltage is limited by

avalanche Beakdown of Base-Emitter junction

collector emitter breakdown voltage with base open(βV

collector emitter breakdown voltage with emitter open(βV

zener break down voltage of the emitter base junction

⇒ For a stable system

both phase and gain margin are negative

both phase and gain margin are positive

phase margin is positive but gain margin is negative

gain margin is positive but phase margin is negative

⇒ A 1 μF capacitor is connected to 12 V battery. The energy stored in the capacitor is

12 x 10

24 x 10

48 x 10

72 x 10

⇒

A-1, B-3, C-4

A-2, B-3, C-4

A-3, B-1, C-2

A-1, B-2, C-3

⇒ The effective channel length of a MOSFET in saturation decreases with increase in

gate voltage

drain voltage

source voltage

body voltage

⇒ A 300 MHz plane EM wave is propagating in free space. The wave is incident normally on an infinite copper slap. The antenuation constant for the wave is (σ

262 x 10

254 x 10

352 x 10

354 x 10

⇒ An R-L circuit has an initial current of 5 A. In the

5L volts

5/L volts

5L

5/L

⇒ Which of the following is the poorest conductor of electricity?

Copper

Aluminium

Manganin

Nichrome

⇒ Amplification of ultrasonic waves is possible in a piezoelectric semiconductor under applied electric field. The basic phenomenon involved is known as

electrostriction

acousto-optic interaction

acousto-electric interaction

stimulated Brillouin scattering

⇒ A series RLC circuit has a resonant frequency of 1000 Hz. The maximum voltage across C is likely to occur at a frequency of about

1000 Hz

2000 Hz

1025 Hz

975 Hz

⇒ An RLC series circuit has a variable inductance. The value of L for resonance conditions at fundamental frequency is 0.18 H. For resonance conditions at third harmonic frequency the value of inductance is

0.54 H

0.06 H

0.02 H

1.62 H

⇒ The resistance in the circuit of the moving coil of a dynamometer wattmeter should be

very low

low

high

almost zero

⇒ A single phase half wave rectifier is feeding a resistive load. As firing angle is increased

dc output voltage and rms output voltage decrease in the same proportion

dc output voltage and rms output voltage decrease

dc output voltage and rms output voltage increase

dc output voltage and rms output voltage increase in the same proportion

⇒ The widely used binary multiplication method is

repeated addition

add and shift

shift and add

any of the above

⇒ The satellites used for intercontinental communication are called

Comsat

Domsat

Marisat

Intelsat

⇒ If A = 629 ± 8 and B = 131 ± 3, A - B with range of doubt is

498 ± 8

498 ± 4

498 ± 11

498 ± 13

⇒ In 2 out of 5 code, decimal number 8 is

11000

10100

11000

1010

⇒ Which of the following is used in lightning arresters?

Thermistor

Photoconductor

Transistor

Varistor

⇒ Thevenin's equivalent circuit

can be drawn only in time domain

can be drawn only in frequency domain

can be drawn both in time and frequency domain

can be drawn in frequency domain with some restrictions

⇒ Which of the following parameters is negligible in transmission lines?

R

L

C

G

⇒ In LED the radiation is in

visible region

infrared region

both (a) and (b)

neither (a) nor (b)

⇒ Figure shows an RC circuit. The magnitude plot V

_{2}/V_{1will rise exponentially to R2/(R1 + R2) as ω → ∞will rise linearly to R2/(R1 + R2) as ω → ∞will decrease to zero as ω → ∞will rise 1 at ω = 0 and then decrease as ω → ∞}⇒ The circuit in the given figur

low pass filter

high pass filter

band Pass filter

band reject filter

⇒ In an LC filter, the ripple factor,

increases with load current

increases with load resistance

remains constant with the load current

has the lowest value

⇒ The reverse saturation current of a diode does not depend on temperature.

TRUE

FALSE

⇒ By the use of which of the following the PPM can be converted to PWM?

A stable multivibrator

Integrator

Monostable multivibrator

Bistable Multivibrator

⇒ Mesh analysis is applicable __________ only.

planar network

non planar network

a circuit which contains only current sources

none

⇒ In a common emitter BJT amplifier, the maximum usable supply voltage is limited by

avalanche Beakdown of Base-Emitter junction

collector emitter breakdown voltage with base open(βV

_{CEO})collector emitter breakdown voltage with emitter open(βV

_{CEO})zener break down voltage of the emitter base junction

⇒ For a stable system

both phase and gain margin are negative

both phase and gain margin are positive

phase margin is positive but gain margin is negative

gain margin is positive but phase margin is negative

⇒ A 1 μF capacitor is connected to 12 V battery. The energy stored in the capacitor is

12 x 10

^{-6}J24 x 10

^{-6}J48 x 10

^{-6}J72 x 10

^{-6}J⇒

Match the following:

List I (Properties) | List II (Relations) | ||
---|---|---|---|

A. | Linear but NOT time-invariant | 1. | y(t) = t^{2}x(t) |

B. | Time-invariant but NOT linear | 2. | y(t) = t |x(t)| |

C. | Linear and time invariant | 3. | y(t) = |x(t)| |

4. | y(t) = x(t - 5) |

A-1, B-3, C-4

A-2, B-3, C-4

A-3, B-1, C-2

A-1, B-2, C-3

⇒ The effective channel length of a MOSFET in saturation decreases with increase in

gate voltage

drain voltage

source voltage

body voltage

⇒ A 300 MHz plane EM wave is propagating in free space. The wave is incident normally on an infinite copper slap. The antenuation constant for the wave is (σ

_{copper}= 5.8 x 10^{7}mho/ m)262 x 10

^{3}254 x 10

^{3}352 x 10

^{3}354 x 10

^{3}⇒ An R-L circuit has an initial current of 5 A. In the

*s*-domain equivalent circuit, the voltage source to take into account the initial current has a strength of5L volts

5/L volts

5L

^{2}volts5/L

^{2}volts⇒ Which of the following is the poorest conductor of electricity?

Copper

Aluminium

Manganin

Nichrome

⇒ Amplification of ultrasonic waves is possible in a piezoelectric semiconductor under applied electric field. The basic phenomenon involved is known as

electrostriction

acousto-optic interaction

acousto-electric interaction

stimulated Brillouin scattering

⇒ A series RLC circuit has a resonant frequency of 1000 Hz. The maximum voltage across C is likely to occur at a frequency of about

1000 Hz

2000 Hz

1025 Hz

975 Hz

⇒ An RLC series circuit has a variable inductance. The value of L for resonance conditions at fundamental frequency is 0.18 H. For resonance conditions at third harmonic frequency the value of inductance is

0.54 H

0.06 H

0.02 H

1.62 H