Torque to weight ratio of indicating instrument

 

in this video I will explain you
1. what is Torque to weight ratio
2. how torque to weight ratio indicate the performance of the instrument
3. minimum value of torque is to weight ratio
4. what is the significance of torque is to weight ratio
5.torque to weight ratio tell us about the sensitivity of the instrument
6. what is the order of torque to weight ratio for sensitive instrument
7. which instrument has highest value of torque is to weight ratio
8. which instrument has lowest value of torque is to weight ratio

Creeping in energy metre

 

in this video I will explain you
1. creeping in energy metre
2. why creeping happened energy metre
3. why potential coil of energy metre be always energized
4. major causes of creeping
5. method of prevention of creeping

question- two holes are drilled in the disc of an diameter of energy metre too

Wien bridge

 

in this video I will explain you

1.wien's Bridge and its use in frequency measurement
2. diagram of wien Bridge
3. in which range wien Bridge calculate frequency
4. why filter is used with null detector
5. working of wien  Bridge

question-which of the following bridges is generally used for the measurement of frequency and capacitance?

Schering bridge

 

in this video I will explain you about

1.the schering bridge
2. phasor diagram of schering bridge
3.dissipation factor in schering bridge

How to make attenuator gain independent of frequency

 

in this video I will explain you

1. what is attenuator 

2.how attenuator is Different from amplifiers 

3.how attenuator gain can be made independent of frequency 

and a numerical based on it

question-an attenuator probe is connected to an amplifier of input capacitance 0.1 microfarad value of C that must be connected across 100 kilo ohm to make the overall gain independent of Frequency 

Power consumed by wattmeter when CT and PT ratio is given

in this video I will explain you
1. how to calculate power measured by wattmeter when CT and PT ratio are given

question- wattmeter is marked 15 /30 ampere and 300 /600 volt and its scale is marked up to 4500 watts when the metre is connected for 30 ampere 600 volt the point indicated 2000watts the actual power in the circuit is

Partial discharge in High Voltage cables

 

in this video I will explain you
1. partial discharge in High Voltage cables
2. how partial discharge occur between conductor
3. reason of partial discharge in insulating material

question- the small packets of air in the high voltage cable provide – relative permittivity – electric field and at the sides breakdown is likely to be initiated