1 Answer

Answer :

Mutual induction is dependent on current changes.

Related questions

Last Answer : The maximum Usable Frequency is dependent on the electron density of the ionospheric layer.

Description : Which common devices works on the basis of the principle of mutual induction? -Do You Know?

Last Answer : answer:

Description : Which common devices works on the basis of the principle of mutual induction?

Last Answer : – Transformer

Description : A transformer works on the principle of – (1) Self induction (2) Mutual induction (3) Generator (4) Inverter

Last Answer : (2) Mutual induction

Description : The basic operating principle of a transformer is attributed to ______________. A. electromagnetic induction B. variance of a conductor in a magnetic field C. mutual reaction D. thermionic emission

Last Answer : Answer: A

Description : A transformer works on the basic principle of ____________. A. self impedance B. attraction and repulsion C. mutual induction D. increasing power

Last Answer : Answer: C

Description : Which common devices works on the basis of the principle of mutual induction?

Last Answer : Transformer

Description : What is meant by mutual induction?

Last Answer : The production of induced e.m.f in secondary coil due to change of current in a neighbouring primary coil is called mutual induction.

Description : What are the use of mutual induction and self-induction?  

Last Answer : Use of mutual induction a. Transformers are works on this principle. b. An inductance furnace makes use of it. c. Used in ignition coils of motor car, motor cycles, scooters etc. Use of ... 's normal working time. c. Used in welding plant rectifiers to keep arc stationary by smoothing choke. 

Description : The left hand rule correlates to (a) current, induced e.m.f. and direction of force on a conductor (b) magnetic field, electric field and direction of force on a conductor (c) self induction, ... and direction of force on a conductor (d) current, magnetic field and direction of force on a conductor

Last Answer : (d) current, magnetic field and direction of force on a conductor

Description : The principle of AC generator is: a. Mutual induction b. self induction c. electromagnetic induction d. Induction

Last Answer : b. self induction

Description : The application of mutual induction is: a. TV b. Radio c. Transformer d. Motor

Last Answer : c. Transformer

Description : The phenomenon of producing emf in the coil due to change of current in the coil itself is called: a. mutual induction b. self-induction c. self-inductance d. mutual inductance

Last Answer : d. mutual inductance

Description : A transformer works on the principle of (1) Self induction (2) Mutual induction (3) Generator (4) Inverter

Last Answer : Mutual induction

Last Answer : Mainly in transformers

Description : State the need of signal conditioning and signal processing .List applications of instrumentation amplifier.

Last Answer : * In an instrumentation system, a transducer is used for sensing various parameters. The output of transducer is an electrical signal proportional to the physical quantity sensed such as pressure, ... monitoring and control 5) Light intensity meter 6) Measurement of flow and thermal conductivity

Description : Which of the following statement is false? Modulation is used to: (1) Reduce the bandwidth used (2) Separate differing transmissions (3) Ensure that intelligence may be transmitted over long distances (4) Allow the use of practicable antennas

Last Answer : Which of the following statement is false? Modulation is used to: Reduce the bandwidth used

Description : Indicate which one of the following is NOT an advantage of FM over AM? (1) Better noise immunity is provided (2) Lower bandwidth is required (3) The transmitted power is more useful (4) Less modulating power is required 

Last Answer : Indicate which one of the following is NOT an advantage of FM over AM? (1) Better noise immunity is provided (2) Lower bandwidth is required (3) The transmitted power is more useful (4) Less modulating power is required 

Description : Theoretical bandwidth requirement for FM system is: (1) Same as that of the modulating signal bandwidth (2) Twice of modulating signal Bandwidth (3) Thrice as of modulating signal Bandwidth (4) Infinite 

Last Answer : Theoretical bandwidth requirement for FM system is: Infinite

Description : The Ku frequency band used in satellite communication (for uplink and downlink) is: (1) 14 GHz and 11 GHz (2) 30 GHz and 20 GHz (3) 70 GHz and 50 GHz (4) 60 GHz and 45 GHz 

Last Answer : The Ku frequency band used in satellite communication (for uplink and downlink) is: 14 GHz and 11 GHz 

Description : The disadvantage of CDMA system is: (1) Higher MAI with more user count. (2) That it needs least power consumption. (3) That it needs coherent signal. (4) That it is not suitable with PSK systems 

Last Answer : The disadvantage of CDMA system is: Higher MAI with more user count. 

Description : Which of the following is an inherent property of an optical signal and cannot be eliminated even in principle? (1) Thermal noise (2) Shot noise (3) Environmental noise (4) Background Noise

Last Answer : Which of the following is an inherent property of an optical signal and cannot be eliminated even in principle? (1) Thermal noise (2) Shot noise (3) Environmental noise (4) Background Noise

Description : The use of non-uniform quantization leads to: (1) Reduction in transmission bandwidth. (2) Increase in maximum SNR. (3) Increase in SNR for signal levels. (4) Simplification of quantization process. 

Last Answer : The use of non-uniform quantization leads to:  Increase in SNR for signal levels.

Description : In amplitude modulation AM, if modulation index is more than 100% then: (1) Power of the wave increases. (2) Efficiency of transmission increases. (3) The wave gets distorted. (4) Bandwidth increases

Last Answer : In amplitude modulation AM, if modulation index is more than 100% then: The wave gets distorted.

Description : In the case of a 70–MHz IF carrier for a transponder bandwidth of 36 MHz, energy must lie between MHz: (1) 34 and 106 (2) 52 and 88 (3) 106 and 142 (4) 34 and 142

Last Answer : In the case of a 70–MHz IF carrier for a transponder bandwidth of 36 MHz, energy must lie between MHz: 52 and 88

Description : In T1 digital system, the frame synchronization code repeats every

Last Answer : In T1 digital system, the frame synchronization code repeats every 125 microsecond

Description : In a PCM system the number of quantization level are 16 and the maximum signal frequency is 4 KHz the transmission bit rate is

Last Answer : In a PCM system the number of quantization level are 16 and the maximum signal frequency is 4 KHz the transmission bit rate is 32 Kbits/sec

Description : Principle of Doppler effect is used in

Last Answer : Principle of Doppler effect is used in MTI radar and CW Doppler radar

Description : The capacity of a standard 4 KHz telephone channel with a 32 dB SNR is

Last Answer : The capacity of a standard 4 KHz telephone channel with a 32 dB SNR is 32953 bits/second

Description : A radio transmitter is an equipment:

Last Answer : A radio transmitter is an equipment:  for generating modulated radio frequency waves

Description : As the thermal noise get doubled due to the increase in a resistance the noise power get.  (A) doubled (B) quadruped (C) unchanged (D) halved.

Last Answer : As the thermal noise get doubled due to the increase in a resistance the noise power get. unchanged 

Description : A two cavity klystron tube is a  (A) velocity modulated tube (B) frequency modulated tube (C) Amplitude modulated tube (D) simple triode

Last Answer : A two cavity klystron tube is a velocity modulated tube

Description : Ionosphere layer of earth is situated at  (A) upto 18 kms from earth (B) from 18 to 70 km (C) 70 to 500 km (D) above 500 km

Last Answer : Ionosphere layer of earth is situated at 70 to 500 km

Description : Which wave cannot exist inside wave guide  (A) TE (B) TM (C) TEM (D) HE

Last Answer : Which wave cannot exist inside wave guide TEM 

Description : The frequency range 30MHz - 300MHz is  (A) medium frequency (B) very high frequency (C) super high frequency (D) Infrared frequency

Last Answer : The frequency range 30MHz - 300MHz is very high frequency

Description : The most common device used for detection in radio receivers is   (A)amplifier (B) triode (C) diode (D) transistor

Last Answer : The most common device used for detection in radio receivers is diode 

Description : In commercial FM broadcasting, the maximum frequency deviation is normally   (A) 5 KHz (B) 15 KHz (C) 75 KHz (D) 200 KHz

Last Answer : In commercial FM broadcasting, the maximum frequency deviation is normally 75 KHz

Description : When a dipole antenna of 1/8 length has an equivalent total resistance of 1.5 Watt then the efficiency of the antenna is   (A) 0.89159% (B) 8.9159% (C) 89.159% (D) 891.59%

Last Answer : When a dipole antenna of 1/8 length has an equivalent total resistance of 1.5 Watt then the efficiency of the antenna is 89.159%

Description : A two port network having a 6 dB loss will give  (A) an output power which is one - quarter of the input power (B) an output power which is one - half of the input power (C) an output voltage which is 0.707 of the input voltage. (D) an output power which is 0.707 of the input power.

Last Answer : A two port network having a 6 dB loss will give an output power which is one - quarter of the input power

Description : When a dominant mode wave guide not terminated in its characteristic impedance is excited with a 10 GHZ signal then if d is the distance between two successive minima of the standing wave in the guide then   (A) d = 1.5 cm (B) d is less then 1.5 cm (C) d is greater then 1.5 cm (D) d = 3 cm

Last Answer : When a dominant mode wave guide not terminated in its characteristic impedance is excited with a 10 GHZ signal then if d is the distance between two successive minima of the standing wave in the guide then d = 1.5 cm

Description : When an antenna of input resistance 73 ohm is connected to a 50-ohm line and if the losses are ignored then its efficiency will be nearly   (A) 0.19 (B) 0.81 (C) 0.97 (D) 1.19

Last Answer : When an antenna of input resistance 73 ohm is connected to a 50-ohm line and if the losses are ignored then its efficiency will be nearly 0.81

Description : In a radio transmitter, the frequency of the crystal oscillator will be stable for a long time if the quality factor of the crystal resonator is  (a) > 100 (b) > 500 (c) > 1000 (d) > 20000

Last Answer : In a radio transmitter, the frequency of the crystal oscillator will be stable for a long time if the quality factor of the crystal resonator is  > 1000

Description : QPSK system is superior to BPSK system because  (a) its bandwidth is higher than that of BPSK System (b) interchannel interference in QPSK system is less then that in BPSK system (c) bandwidth ... is half of the bandwidth of BPSK system (d) in QPSK system inter-symbol interference is improved

Last Answer : QPSK system is superior to BPSK system because bandwidth of QPSK system is half of the bandwidth of BPSK system 

Description : A radio receiver is placed at one corner of a table and again placed at some other corner of the same table. Loudspeaker output is changed because  (a) image interference is reduced (b) adjacent channel interference is increased (c) of fading (d) line of sight propagation is not utilized

Last Answer : A radio receiver is placed at one corner of a table and again placed at some other corner of the same table. Loudspeaker output is changed because of fading

Description : Earth coverage dish antenna is used in satellite system. It is characterized by the fact that  (a) It is a narrow beam antenna (b) It is Parabolic antenna (c) it is sharply focused within a small area ... the earth (d) it is a wide angle antenna which covers a large area of the surface of the earth

Last Answer : Earth coverage dish antenna is used in satellite system. It is characterized by the fact that it is sharply focused within a small area of the surface of the earth

Description : A rectangular waveguide is 4.2 cm by 1.85 cm. The cut-off frequency of the dominant mode through this waveguide is  (a) 3.57 GHz (b) 3.75 GHz (c) 3.70 MHz (d) 3.57 MHz

Last Answer : A rectangular waveguide is 4.2 cm by 1.85 cm. The cut-off frequency of the dominant mode through this waveguide is  3.57 GHz 

Description : For an antenna to be frequency-independent, it should expand or contract in proportion to the  (a) gain (b) directivity (c) wavelength (d) impedance

Last Answer : For an antenna to be frequency-independent, it should expand or contract in proportion to the impedance

Description : The frequency range of FM radio is

Last Answer : The frequency range of FM radio is 88MHz to 108MHz

Description : The basic element of radio communication system which generates radio waves is  1. micro phone 2. transmitter 3.transmitting antenna 4. Loudspeaker 

Last Answer : The basic element of radio communication system which generates radio waves is transmitter 

Description : U.H.F. band covers the range of  1. 0-300 KHz 2. 3-30 MHz 3. 300-3000 KHz 4. 300 MHz - 3 GHz

Last Answer : U.H.F. band covers the range of 300 MHz - 3 GHz