Can a hot-wire ammeter be used to measure a direct current having a constant value? Do we have to change the graduation?

Hot wire ammeters are used for measuring

A dc ammeter and a hot wire ammeter are connected to a circuit in series. When a direct current is passed through circuit, the dc ammeter shows 6 A. When ac current flows through circuit, the ac ammeter shows 8A. What will be reading of each ammeter if dc and ac current flow simulataneously through the circuit?

A : If a current has both ac and dc components, then a dc ammeter used to measure this current will measure the average value of the total current. R : The scale of a dc ammeter is uniformly divided.

A bomb calorimeter is used to measure the value of……………….at constant………………… .

An ac ammeter is used to measure currnet in a circuit. When a given direct current passes through the circuit. The ac ammeter reads 3 A. When another alternating current passes through the circuit, the ac ammeter reads 4A. Then find the reading of this ammeter (inA), if dc and ac flow through the circuit simultaneously.

An ammeter of resistance 0*80Omega can measure current upto 1*0A . (a) What must be the value of shunt resistance to enable the ammeter to measure current upto 5*0A ? (b) What is the combined resistance of the ammeter and the shunt?

When two wires have current in same direction then force is

In a heating arrangement , an alternating current having a peak value of 28 A is used . To produce the same heat energy , If the constant current is used, its magnitude must be

Can a particle have a constant velocity and varying speed ?

A : The ammeters and volmetrs used for measuring alternating current and voltages have non-uniform divisons on their scales. R : The instruments used for measuring alternating current and voltage are based on heating effect of current.