1 Answer

Answer :

The skin effect causes current to flow Near the surface of the conductor

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Last Answer : (B) Flow of current through a heating element

Description : In low or standard frequency induction furnace, heat is produced by the (A) Combination of induced current and skin effect (B) Induction and resistance (C) Current flow through a heating element (D) None of these

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Description : In human being, haemorrhage causes a. venous constriction b. decreased blood flow to the skin c. a fall in cardiac output d. all above

Last Answer : all above

Description : In human being, haemorrhage causes a. venous constriction b. decreased blood flow to the skin c. a fall in cardiac output d. splenic contraction

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Last Answer : (D) High frequency induction

Description : Owing to skin effect (a) current flows through the half cross-section of the conductor (b) portion of the conductor near the surface carries more current and core of the conductor carries less current (c) ... core of the conductor carries more cur¬rent (d) any of the above (e) none of the above

Last Answer : (b) portion of the conductor near the surface carries more current and core of the conductor carries less current

Description : The skin effect in conductors is due to non uniform distribution of current in it and major portion of current is near the _______ of conductor.  (1) Surface (2) Center (3) Complete cross section area (4) Axis

Last Answer : The skin effect in conductors is due to non uniform distribution of current in it and major portion of current is near the Surface of conductor. 

Description : Skin effect occurs when a conductor carries current at_____ frequencies.

Last Answer : Skin effect occurs when a conductor carries current at high frequencies.

Description : Explain hysteresis loss, eddy current loss and skin effect limitations with reference to magnetic material.

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Description : Reversing the current flow through a coil will ___________. A. reduce the amount of flux produced B. have no effect on the eddy currents produced C. reduce the power consumed D. reverse its two-pole field

Last Answer : Answer: D

Description : What effect does an increase in capacitance have on a capacitor’s opposition to current flow?

Last Answer : Opposition to current flow decreases.

Description : During avalanche effect breakdown, what limits current flow through the diode?

Last Answer : an external current-limiting resistor

Description : What is the effect of current flow through the coil in a d’Arsonval meter movement?

Last Answer : A magnetic field is generated around the coil and the attraction of this field with the permanent magnet causes the coil to move

Description : The force that causes free electrons to move in a conductor as electric current flow is called a/an _____________. A. resistant force B. electromotive force C. inductive force D. dielectric force

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Description : A high voltage applied to a gas discharge tube containing neon gas at very low pressure causes a current to flow through the tube. Which one of the following are the particles that flow towards the ... Are they w) electrons x) protons y) negatively charged neon ions z) positively charged neon ions

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Description : An emf of 120 V causes a current of 3A to flow in a circuit how much energy is supplied by the source in 12 seconds. A. 4130 J B. 4310 J C. 4320 J D. None of these 

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Description : The pressure and velocity at the throat of a Venturi tube, measuring the flow of a liquid, are related to the upstream pressure and velocity, respectively, as follows: (A) Pressure is lower but ... velocity is lower (C) Both pressure and velocity are lower (D) Pressure and velocity are identical

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Description : Liquid flow rate is measured using (A) a pirani gauge (B) a pyrometer (C) an orifice plate (D) a bourdon tube

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Description : The threshold effect in demodulators is a) The rapid fall of output SNR when the input SNR falls below a particular value b) Exhibited by all the demodulators when the input SNR is low c) Exhibited by all AM suppressed carrier coherent demodulators d) Exhibited by correlation receivers

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Description : A Hall Effect sensor  A) exists only in theory B) is a non-contacting magnetic sensor C) can operate only a few times before failure  D) produces very large voltages 

Last Answer : A hall effect sensor is a non-contacting magnetic sensor

Last Answer : The effect of ground on radiation pattern is : To produce more number of nulls, To cause cancellation of radiation along with ground.

Last Answer : Satellite tracking stations are located in remote areas in order to minimise the effect of Man-made noise.

Description : What are the applications of Hall effect?

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Last Answer : Which type of fading causes serious distortion of modulated signal: Selective fading.

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Last Answer : Excessive high voice signal may cause overmodulation. Modulating component greater than carrier may cause overmodulation. Setting the gain of the microphone too high may cause overmodulation.