Normal electrical motor produces rotatory motion same the linear motor produces linear motion. Linear motors have low efficiency. Linear motor can directly produce straight line motion linear motor do not required gears or crank shaft to produce linear motion.

answered
Jan 17, 2018
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anonymous

**Description :** Write short notes on diode.

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**Description :** write short notes on BH curve.

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**Description :** write short notes on Low-pass filter.

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**Description :** Can you edit iphone "notes" on your mac and then sync to the phone?

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**Description :** A linear network has a current input 4cos(ω t + 20º)A and a voltage output 10 cos(ωt +110º) V. Determine the associated impedance.

**Last Answer :** Solution

**Description :**

**Last Answer :** https://youtu.be/fgQTs-1hq7Q

**Description :** What are ‘Linear actuators’ ? State applications.

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**Description :** Linear algebra problem: Rank of a matrix

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**Description :** Linear algebra problem: The determinant of the matrix

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**Description :** Linear and non-linear device

**Last Answer :** Linear and non-linear device

**Description :** A system is linear if and only if it satisfies

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**Description :** A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled then the voltage across each resistor will

**Last Answer :** A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled then the voltage across each resistor will not change

**Description :** Which of the following converts linear displacement from a mechanical reference into a proportional electrical signal containing phase and amplitude information? A) CRO B) LVDT C) RVDT D) None of these

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**Description :** The power flow problem mathematical model for a linear transmission network (A) is non-linear (B) is linear (C) considers time variation of generation (D) does not consider tap-changing transformers

**Last Answer :** The power flow problem mathematical model for a linear transmission network is non-linear

**Description :** What are the disadvantages of the linear regulator? how are they overcome in the switching regulator? What is continuous and discontinuous mode switching regulator?

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**Description :** Linear Time Invariant (LTI) System

**Last Answer :** Linear Time Invariant System Linear system means a system which possesses the property of superposition. Time invariant system means its behavior and characteristics are fixed over time. Before ... from the impulse response. Impulse response is related to frequency response via Fourier transform.

**Description :** what is linear regulator?

**Last Answer :** linear regulator video

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**Description :** 2000 The rank of matrix is

**Last Answer :** .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

**Description :** Split phase induction motor

**Last Answer :** Split phase induction motor : There are two windings used in split phase induction motor. It is a type of single-phase induction motor. There are two winding one is called main winding and ... motor have low starting torque it is used for small fans, blowers, centrifugal pumps, grinders etc.

**Description :** Describe the reason of using dc series motor for electric trains.

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**Description :** A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be

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**Description :** Damper winding in a synchronous motor

**Last Answer :** Damper winding in a synchronous motor Serves to start the motor.

**Description :** In a double squirrel cage induction motor, good starting torque is produced as (A) Large current flows through the outer high resistance winding. (B) Large current flows through the inner high ... the outer high resistance winding. (D) Large current flows through the inner low resistance winding.

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**Description :** A change of 4% in the supply voltage to an induction motor will produce a change of approximately

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**Description :** In an induction motor if the flux density is reduced to one-half, of its normal value then the torque will (1) reduce to one-half (2) reduce to one-fourth (3) remain unchanged (4) increase four times

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**Description :** The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque (1) Decreases (2) Increases (3) Remains constant (4) None of the above

**Last Answer :** The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases

**Description :** The number of poles of 8/6 stepper motor can be :

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**Description :** In a 2 kW, 200 V, 1000 rpm. DC series motor the torque at full load was found to be 0.3 N -m. The torque at half full load in N -m is :

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**Description :** Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be

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**Description :** The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is

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**Last Answer :** A 400 V, 50 Hz three-phase induction motor rotates at 1440 rpm on full -load. The motor is wound for 4 poles

**Description :** The function of a brush and commutator arrangement in a dc motor is to (1) produce unidirectional torque (2) produce unidirectional current in the armature (3) help in changing the direction of rotation of the armature (4) reduce sparking

**Last Answer :** The function of a brush and commutator arrangement in a dc motor is to produce unidirectional torque

**Description :** The speed of a 2-pole, 3-phase stepper motor operated by 1200 pulses/min (A) 100 rpm (B) 200 rpm (C) 400 rpm (D) 800 rpm

**Last Answer :** The speed of a 2-pole, 3-phase stepper motor operated by 1200 pulses/min 200 rpm

**Description :** In a split-phase induction motor, the resistance/reactance ratios of windings are such that (A) current in the auxiliary winding leads the current in the main winding (B) current in the ... (C) both windings develop the same starting torque (D) both windings develop high starting current

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**Description :** In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then (A) the flux is constant (B) the flux first decreases and then increases in ... increases and decreases in the opposite direction with the same magnitude (D) current flows through the rotor

**Last Answer :** In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then the flux first decreases and then increases in the same direction

**Description :** The maximum reluctance power of a salient-pole synchronous motor having direct-axis reactance, 1.0 pu and quadrature-axis reactance, 0.5 pu, and input voltage, 1.0 pu is (A) 0.25 pu (B) 0.5 pu (C) 1.0 pu (D) 1.5 pu

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**Description :** The effect of increasing load on a synchronous motor running with normal excitation is (A) Increase both its Ia and power factor. (B) Decrease Ia, but increase power factor. (C) Increase Ia, but decrease power factor (D) Decrease both Ia and power factor.

**Last Answer :** The effect of increasing load on a synchronous motor running with normal excitation is Increase Ia, but decrease power factor

**Description :** A 3-phase, 4-pole, 50Hz induction motor runs at a speed of 1440 rpm. The rotating field produced by the rotor rotates at a speed of ________ rpm with respect to stator field. (A) 1500 (B) 0 (C) 1440 (D) 60

**Last Answer :** 0

**Description :** An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is (A) 5.06 kW (B) 0.3 kW (C) 100 kW (D) 83.33 kW

**Last Answer :** An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is 83.33 kW

**Description :** The torque developed by any 3-phase induction motor at 0.8 p.u. slip is (A) Full-load torque (B) unstable torque (C) starting torque (D) break down

**Last Answer :** The torque developed by any 3-phase induction motor at 0.8 p.u. slip is unstable torque