m. Write the function of the following
a ammeter
b voltmeter
C- galvanameter
a electric motor
e electric fuse.
Answers
Answer:
AMMETER: An ammeter (from Ampere Meter) is a measuring instrument used to measure the current in a circuit. Electric currents are measured in amperes (A), hence the name. Instruments used to measure smaller currents, in the milliampere or microampere range, are designated as milliammeters or microammeters.
VOLTMETER :A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit; digital voltmeters give a numerical display of voltage by use of an analog to digital converter
GALVANOMETER:Galvanometer is an instrument that can measure the small electrical current by deflection in electrical circuit. ... A galvanometer can work as the actuator, by producing the rotary deflection of any "pointer", in response to the electric current that is flowing through the coil in the magnetic field that is constant.
ELECTRIC MOTOR: Brushes: It conducts current between stationary wires and moving parts, most commonly in a rotating shaft. 3. Split Ring: It helps to reverse the direction of current in the circuit.
ELECTRIC FUSE: The function of a fuse is usually to prevent fire - that's the basic protection a fuse offers - between power supply and appliance there may be a few feet or metres of cable - if a short circuit occurs in the appliance, the cable could easily become overheated (due to excess current) and burn or rupture its insulation.
Explanation:
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Answer:
A)An ammeter measures the electric current in a circuit. The name is derived from the name for the SI unit for electric current, amperes An ammeter is a measuring device used to measure the electric current in a circuit.
B) A voltmeter is an instrument that measures the difference in electrical potential between two points in an electric circuit. An analog voltmeter moves a pointer across a scale in proportion to the circuit’s voltage; a digital voltmeter provides a numerical display
C) The galvanometer can be used to measure;
The galvanometer can be used to measure;a) the value of current in the circuit by connecting it in parallel to low resistance.
The galvanometer can be used to measure;a) the value of current in the circuit by connecting it in parallel to low resistance.b) the voltage by connecting it in series with high resistance.
D) Electric motor : (Functions )
•Power Source: A simple motor usually has a DC power source. It supplies power to the motor armature or field coils.
•Commutator: It is the rotating interface of the armature coil with a stationary circuit.
•Field Magnet: The magnetic field helps to produce a torque on the rotating armature coil by virtue of Fleming’s left-hand rule.
•Armature Core: Holds the armature coil in place and provides mechanical support.
•Armature Coil: It helps the motor to run.
• Brushes: It is a device that conducts current between stationary wires and moving parts, most commonly the rotating shaft.
E) Electric fuse : (functions)
•Acts as a barrier between the electric circuit and the human body
•Prevents device failure due to faulty circuit operation
•Fuse prevents short-circuits
•Prevents overload and blackouts
•Prevents damage that is caused due to mismatched loads.
Explanation:
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