Recent questions tagged maximum

asked Aug 17, 2019 by anonymous

Define : i) Maximum Value ii) RMS Value of ac supply

Last answer: i) Maximum Value :- The maximum or peak value attained by an alternating quantity during positive or negative half cycle, is called maximum value or peak value. ii) RMS Value of ac ... as produced by the alternating current when flowing through the same resistance and for the same time.

0 like 0 dislike

43 views 1 answer

1

asked Aug 4, 2019 by anonymous

Define the following terms: 1) Virtual height 2) Actual height 3) Critical frequency. 4) Maximum usable frequency.

Last answer: 1) Virtual height:- The incident and refracted rays follow paths that are exactly the same as they have been if reflection had taken place from a surface located at a greater height, called ... angle of incidence is other than the normal is known as maximum unstable frequency. MUF= fc secθ

0 like 0 dislike

55 views 1 answer

2

asked May 22, 2019 by anonymous

Maximum Power Transfer Theorem 1

Last answer: Maximum Power Transfer Theorem 1

0 like 0 dislike

72 views 1 answer

3

asked Sep 6, 2018 by anonymous

State maximum power transfer theorem for DC circuit.

Last answer: Maximum power transfer theorem for DC circuit: The maximum power transfer theorem states that the source or a network transfers maximum power to load only when the load resistance is equal ... removed (disconnected) ii) All internal independent sources are replaced by their internal resistances.

0 like 0 dislike

72 views 1 answer

4

asked Jun 18, 2018 by anonymous

An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to

An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when A) ZL = R B) ZL = jXS C) ZL = R-jXS D) ZL = R+jXS

Last answer: An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when ZL = R-jXS

0 like 0 dislike

2.6k views 1 answer

5

asked Jun 18, 2018 by anonymous

A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case

A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case thermal resistance of 1.00 C/W, and a junction-to ambient thermal resistance of 600 C/W. If the ambient temperature is 300o C, then the maximum allowable power dissipation in the device will be A) 1.52 W B) 1.72 W C) 1.92W D) 2.00 W

Last answer: A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case thermal resistance of 1.00 C/W, and a junction-to ambient thermal resistance of ... 300o C, then the maximum allowable power dissipation in the device will be 2.00 W

0 like 0 dislike

114 views 1 answer

6

asked Apr 28, 2018 by anonymous

The maximum reluctance power of a salient-pole synchronous motor having direct-axis reactance, 1.0 pu and

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

Last answer: 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 0.5 pu

0 like 0 dislike

71 views 1 answer

7

asked Mar 26, 2018 by anonymous

The maximum torque of d.c. motors is limited by?

Last answer: The maximum torque of d.c. motors is limited by commutation.

0 like 0 dislike

291 views 1 answer

8

asked Mar 25, 2018 by anonymous

For maximum transfer of power, internal resistance of the source should be?

Last answer: For maximum transfer of power, internal resistance of the source should be equal to load resistance.

0 like 0 dislike

223 views 1 answer

9

asked Mar 25, 2018 by anonymous

"Maximum power output is obtained from a network when the load resistance...

"Maximum power output is obtained from a network when the load resistance is equal to the output resistance of the network as seen from the terminals of the load". The above statement is associated with?

Last answer: "Maximum power output is obtained from a network when the load resistance is equal to the output resistance of the network as seen from the terminals of the load". The above statement is associated with Maximum power transfer theorem.

0 like 0 dislike

108 views 1 answer

10

asked Mar 20, 2018 by anonymous

Which D.C. motor has got maximum self relieving property ?

Last answer: Series motor has got maximum self relieving property.

0 like 0 dislike

128 views 1 answer

11

asked Mar 20, 2018 by anonymous

D.C. generators are normally designed for maximum efficiency around?

Last answer: D.C. generators are normally designed for maximum efficiency around full-load.

0 like 0 dislike

69 views 1 answer

12

asked Mar 20, 2018 by anonymous

The condition for maximum efficiency for a D.C. generator is?

Last answer: The condition for maximum efficiency for a D.C. generator is variable losses equal to constant losses.

0 like 0 dislike

143 views 1 answer

13

asked Mar 20, 2018 by anonymous

The condition for maximum power in case of D.C. motor is?

0 like 0 dislike

83 views 0 answers

14

asked Mar 20, 2018 by anonymous

The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is?

Last answer: The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is 0.5.

0 like 0 dislike

144 views 1 answer

15

asked Mar 20, 2018 by anonymous

In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be?

Last answer: In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be more than full-load current.

0 like 0 dislike

168 views 1 answer

16

asked Mar 20, 2018 by anonymous

In repulsion motor, maximum torque is developed when?

Last answer: In repulsion motor, maximum torque is developed when brush axis is at 45° electrical to the field axis.

0 like 0 dislike

70 views 1 answer

17

asked Mar 20, 2018 by anonymous

The maximum constant load torque under which a synchronous motor will pull into synchronism...

The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as?

Last answer: The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as pull-in torque.

0 like 0 dislike

213 views 1 answer

18

asked Mar 20, 2018 by anonymous

The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor...

The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor, at rated stator supply voltage and frequency, is known as?

0 like 0 dislike

86 views 0 answers

19

asked Mar 20, 2018 by anonymous

In a power plant if the maximum demand on the plant is equal to the plant capacity, then?

Last answer: In a power plant if the maximum demand on the plant is equal to the plant capacity, then plant reserve capacity will be zero.

0 like 0 dislike

96 views 1 answer

20

asked Mar 20, 2018 by anonymous

Generators for peak load plants are usually designed for maximum efficiency at?

Last answer: Generators for peak load plants are usually designed for maximum efficiency at 50 to 75 percent full load.

0 like 0 dislike

86 views 1 answer

21

asked Mar 20, 2018 by anonymous

Maximum demand on a power plant is?

Last answer: Maximum demand on a power plant is the greatest of all "short time interval averaged" demand during a period.

0 like 0 dislike

69 views 1 answer

22

asked Mar 20, 2018 by anonymous

Power plant having maximum demand more than the installed rated capacity will have utilisation factor?

Last answer: Power plant having maximum demand more than the installed rated capacity will have utilisation factor more than unity.

0 like 0 dislike

68 views 1 answer

23

asked Mar 19, 2018 by anonymous

An ideal transformer will have maximum efficiency at a load such that?

Last answer: An ideal transformer will have maximum efficiency at a load such that copper loss equal to iron loss.

0 like 0 dislike

96 views 1 answer

24

asked Mar 19, 2018 by anonymous

For a transformer, operating at constant load current, maximum efficiency will occur at?

Last answer: For a transformer, operating at constant load current, maximum efficiency will occur at unity power factor.

0 like 0 dislike

89 views 1 answer

25

asked Mar 19, 2018 by anonymous

If a transformer is continuously operated the maximum temperature rise will occur in?

Last answer: If a transformer is continuously operated the maximum temperature rise will occur in windings.

0 like 0 dislike

56 views 1 answer

26

asked Mar 19, 2018 by anonymous

The maximum load that a power transformer can carry is limited by its?

Last answer: The maximum load that a power transformer can carry is limited by its voltage ratio.

0 like 0 dislike

103 views 1 answer

27

asked Mar 19, 2018 by anonymous

What is the maximum value of power factor?

Last answer: 1 is the maximum value of power factor.

0 like 0 dislike

79 views 1 answer

28

asked Mar 19, 2018 by anonymous

In which fault the maximum short circuit current occurs?

Last answer: In three phase bolted fault the maximum short circuit occurs.

0 like 0 dislike

91 views 1 answer

29

asked Mar 18, 2018 by anonymous

What is the maximum value of torque angle in synchronous motor?

Last answer: The maximum value of torque angle in synchronous motor is 90 degrees electrical.

0 like 0 dislike

698 views 1 answer

30

asked Mar 18, 2018 by anonymous

The synchronous motor will develop maximum power when the load angle is?

Last answer: The synchronous motor will develop maximum power when the load angle is 900.

0 like 0 dislike

80 views 1 answer

31

asked Mar 10, 2018 by anonymous

What is the maximum number of circuit breakers in a panel?

Last answer: It depends on that which type of panel is this.

0 like 0 dislike

77 views 1 answer

32

asked Sep 30, 2017 by anonymous

when will be the maximum efficiency of transformer?

Last answer: Transformer efficiency is maximum when copper losses are equal to iron losses.

0 like 0 dislike

69 views 1 answer

33