Podcast
Questions and Answers
What is the unit for current?
What is the unit for current?
- Watts (W)
- Ohms (Ω)
- Volts (V)
- Amps (A) (correct)
How should an ammeter be connected in a circuit to measure current?
How should an ammeter be connected in a circuit to measure current?
- In parallel
- At the power source
- In series (correct)
- Opposite to the load
What should be avoided to prevent short-circuit currents in an ammeter?
What should be avoided to prevent short-circuit currents in an ammeter?
- Removing the protective cover
- Using high resistance
- Connecting in parallel (correct)
- Connecting in series
What is the unit for voltage?
What is the unit for voltage?
How should a voltmeter be connected to measure potential difference?
How should a voltmeter be connected to measure potential difference?
Why is it crucial to always connect a voltmeter in parallel in a circuit?
Why is it crucial to always connect a voltmeter in parallel in a circuit?
Which type of instrument uses an iron plate that moves in response to the magnetic field of the stationary coil?
Which type of instrument uses an iron plate that moves in response to the magnetic field of the stationary coil?
What is the main advantage of a Moving Iron Instrument over other types of instruments?
What is the main advantage of a Moving Iron Instrument over other types of instruments?
In a repulsion type instrument, why does the moving coil start moving away from the fixed vane?
In a repulsion type instrument, why does the moving coil start moving away from the fixed vane?
What is a disadvantage of the scale of moving iron instruments?
What is a disadvantage of the scale of moving iron instruments?
What is the primary difference between AC and DC calibration of instruments?
What is the primary difference between AC and DC calibration of instruments?
What is the purpose of the fixed coil in the electrodynamometer wattmeter?
What is the purpose of the fixed coil in the electrodynamometer wattmeter?
Why is a spring control system used in the electrodynamometer wattmeter?
Why is a spring control system used in the electrodynamometer wattmeter?
What prevents the use of other types of damping in the electrodynamometer wattmeter system?
What prevents the use of other types of damping in the electrodynamometer wattmeter system?
Which factor can create serious errors in a dynamometer wattmeter at low power factors?
Which factor can create serious errors in a dynamometer wattmeter at low power factors?
What is the material used for designing the moving coil in a PMMC instrument?
What is the material used for designing the moving coil in a PMMC instrument?
Which material is used for the permanent magnets in a PMMC instrument?
Which material is used for the permanent magnets in a PMMC instrument?
What produces the damping torque in a PMMC instrument?
What produces the damping torque in a PMMC instrument?
What opposes the deflecting torque in a PMMC instrument at steady-state conditions?
What opposes the deflecting torque in a PMMC instrument at steady-state conditions?
Which part of the PMMC instrument indicates the measured current value?
Which part of the PMMC instrument indicates the measured current value?
What are some advantages of PMMC instruments?
What are some advantages of PMMC instruments?
What does earthing in electrical systems help to protect against?
What does earthing in electrical systems help to protect against?
Why is the body of electrical equipment connected to earth instead of the supply neutral?
Why is the body of electrical equipment connected to earth instead of the supply neutral?
What is a method of earthing mentioned in the text?
What is a method of earthing mentioned in the text?
What necessity led to the development of electrical earthing?
What necessity led to the development of electrical earthing?
What is the purpose of the Braking System in an energy meter?
What is the purpose of the Braking System in an energy meter?
What material is the core of the electromagnet in the Driving System made of?
What material is the core of the electromagnet in the Driving System made of?
Which main part of the energy meter is responsible for recording the number of rotations of the disc?
Which main part of the energy meter is responsible for recording the number of rotations of the disc?
What happens to the aluminium disc in the Moving System when power is consumed by the device?
What happens to the aluminium disc in the Moving System when power is consumed by the device?
In the context of energy meters, what does PMMC stand for?
In the context of energy meters, what does PMMC stand for?
What is the purpose of embedding the plate in alternate layers of coal and salt for a thickness of 15 cm?
What is the purpose of embedding the plate in alternate layers of coal and salt for a thickness of 15 cm?
Why is water poured around the earth electrode in plate earthing?
Why is water poured around the earth electrode in plate earthing?
What is the benefit of placing the GI iron pipe vertically at a depth of 4.75m in pipe earthing?
What is the benefit of placing the GI iron pipe vertically at a depth of 4.75m in pipe earthing?
What is one electrical safety precaution mentioned in the text?
What is one electrical safety precaution mentioned in the text?
What is the danger of working on receptacles with wet hands?
What is the danger of working on receptacles with wet hands?
What is recommended to do in case of accidental contact with a live wire?
What is recommended to do in case of accidental contact with a live wire?
How can the danger of accidental shock be reduced according to the text?
How can the danger of accidental shock be reduced according to the text?
What is NOT a recommended practice during electrical work based on the text?
What is NOT a recommended practice during electrical work based on the text?
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 case of short-circuiting or accidental contact with live wires?
What should be done immediately in case of short-circuiting or accidental contact with live wires?
Flashcards are hidden until you start studying
