Podcast
Questions and Answers
What is the symbol for current?
What is the symbol for current?
- C
- V
- E
- A (correct)
How should an ammeter be connected to measure current?
How should an ammeter be connected to measure current?
- In series with the load (correct)
- Across the load
- In parallel with the load
- In parallel with the voltage source
What problem may occur if an ammeter is connected in parallel with a circuit component?
What problem may occur if an ammeter is connected in parallel with a circuit component?
- Increased resistance
- Reduced voltage
- Short-circuit current (correct)
- Decreased current
What is the unit of voltage?
What is the unit of voltage?
Why is it important for ammeters to have low internal resistance?
Why is it important for ammeters to have low internal resistance?
What causes waveform error in MI instruments?
What causes waveform error in MI instruments?
Why is the fixed coil of the electrodynamometer wattmeter split into two parts?
Why is the fixed coil of the electrodynamometer wattmeter split into two parts?
What type of control system does the Electrodynamometer Wattmeter use?
What type of control system does the Electrodynamometer Wattmeter use?
What is the purpose of the knife-edge pointer in electrodynamometer wattmeters?
What is the purpose of the knife-edge pointer in electrodynamometer wattmeters?
What is the major disadvantage of the Dynamometer Type Wattmeter at low power factors?
What is the major disadvantage of the Dynamometer Type Wattmeter at low power factors?
What is a major advantage of the PMMC instrument?
What is a major advantage of the PMMC instrument?
Why is the body of the electrical equipment not connected to the supply neutral directly?
Why is the body of the electrical equipment not connected to the supply neutral directly?
Which application is NOT listed for the PMMC instrument?
Which application is NOT listed for the PMMC instrument?
What is the primary purpose of electrical earthing?
What is the primary purpose of electrical earthing?
What is a key advantage of plate earthing over pipe earthing?
What is a key advantage of plate earthing over pipe earthing?
Why is connecting a voltmeter in parallel important in a circuit?
Why is connecting a voltmeter in parallel important in a circuit?
What is the purpose of the high internal resistance in voltmeters?
What is the purpose of the high internal resistance in voltmeters?
How does a repulsion type instrument function in measuring current?
How does a repulsion type instrument function in measuring current?
Why are moving iron instruments considered robust?
Why are moving iron instruments considered robust?
What is a disadvantage of moving iron instruments in terms of accuracy?
What is a disadvantage of moving iron instruments in terms of accuracy?
What is the purpose of the aluminum former in the PMMC instrument?
What is the purpose of the aluminum former in the PMMC instrument?
Which material are the permanent magnets in the PMMC instrument made of?
Which material are the permanent magnets in the PMMC instrument made of?
What is the role of the control spring system in the PMMC instrument?
What is the role of the control spring system in the PMMC instrument?
How does the PMMC instrument reach a steady-state position?
How does the PMMC instrument reach a steady-state position?
What is the role of the mirror and proper alignment of the pointer blade in the PMMC instrument?
What is the role of the mirror and proper alignment of the pointer blade in the PMMC instrument?
What is the main component of the driving system in a single-phase energy meter?
What is the main component of the driving system in a single-phase energy meter?
What is the purpose of the braking system in an energy meter?
What is the purpose of the braking system in an energy meter?
How is the movement of the aluminium disc controlled in an energy meter?
How is the movement of the aluminium disc controlled in an energy meter?
What is the role of the register system in an energy meter?
What is the role of the register system in an energy meter?
What does the PMMC instrument measure in an energy meter?
What does the PMMC instrument measure in an energy meter?
What is the purpose of pouring water in the Plate Earthing system?
What is the purpose of pouring water in the Plate Earthing system?
In Pipe Earthing, why is a mixture of salt and coal filled around the GI pipe?
In Pipe Earthing, why is a mixture of salt and coal filled around the GI pipe?
Why are insulated tools recommended while working with electricity?
Why are insulated tools recommended while working with electricity?
Why should all electric connections at switches, plugs, sockets, and junctions be tight?
Why should all electric connections at switches, plugs, sockets, and junctions be tight?
What should be done immediately in the case of a short-circuit or accidental contact with a live wire?
What should be done immediately in the case of a short-circuit or accidental contact with a live wire?
How can you decrease the danger of any accidental shock?
How can you decrease the danger of any accidental shock?
What is the purpose of avoiding contact with water while working with electricity?
What is the purpose of avoiding contact with water while working with electricity?
Why must fuses and switches be connected in the live wires?
Why must fuses and switches be connected in the live wires?
What should be done if a person has accidentally contacted a live wire?
What should be done if a person has accidentally contacted a live wire?
Why is it recommended to use rubber gloves and goggles while working on any electrical circuit?
Why is it recommended to use rubber gloves and goggles while working on any electrical circuit?
