A potential difference of 220 V is applied across a resistance of 440Ωin an electrical appliance. Calculate the current drawn and heat energy produced in 20 seconds. View Solution Doubtnut is No.1 Study App and
Note: while the DMM settings described in this article were written to describe using a Fluke DMM, most digital multimeters will have very similar controls and will use similar measurement procedures. At left our photo illustrates the Sperry DSA-500 clamp-on multimeter/ammeter reading 0.28A (Amps...
Switch off the motor, and then disconnect one of the wires powering the motor. Attach your ammeter or digital multimeter set to measure DC current; attach it between the motor and the detached wire. Always wire ammeters in series with a circuit, placing them between the power source and the...
Since current always creates a magnetic field, there areHall Effectand other sensors that allow us to measure this field and thereby measure the current. It is also possible to connect a shunt resistor within the circuit itself and directly measure the current, as in the classic ammeter and cu...
If you have only a voltmeter and ammeter - Check open circuit voltage to confirm turns ratio measure output voltage with a resistive load to measure "regulation" Δvolts/Δamps , perhaps some large lamps, or a heating element perhaps a kitchen toaster or small electric heater. Aug 9, 2016...
Place the AC ammeter around one of the power wires in an AC circuit. This can be either the hot wire or the neutral common wire in the circuit. Both of these wires will carry the current or amperage for the electrical circuit.
Its reading is found to be 45 of the full scale reading. Find : (a) internal resistance r of the cell (b) range of the ammeter and voltmeter (c) full scale deflection current of the galvanometer. View Solution A multirange voltmeter can be constructed by using a galvanometer circuit ...
The current is the same everywhere in a series circuit. It does not matter where you put the ammeter, it will give you the same reading. How do you find the voltage drop in a series circuit? To calculate voltage drop, E, across a component, you need to know the resistance of the co...
② Transformer The control transformer reduces line voltage to 24 volts for the gas valve and limit circuit. ③ Draft hood ④ The draft hood provides a minimum draft for the boiler, assuring adequate air for combustion if installed in accordance with manual and not modified in any way. Spill...
Likewise, he may measure the voltage with and without the ammeter in the circuit. In the optics experiment on diverging lenses, the student may wish to apply the concave-mirror procedure to determine by reflection the radii of curvature of the lens, from which he can calculate the focal ...