Hot wire ammeter

The hot wire ammeter is a device used to measure

• A.C

• D.C

• voltage

• A.C and D.C

hot wire ammeter working idea is based on the

• Thermal effect of electrical current

• positive protons effect

• magnetism effect

• electrons effect

hot wire ammeter wire that made of........................................

• Iron

• copper

• platinum ,iridium

• all of above

From Disadvantages of hot wire ammeter

• can measure A.C and D.C

• Slowly pointer deflection

• sensitive to the heat.

• put the wire on the plate

how the scientists faced the ammeter is affected by atmospheric temperature ?

the hot wire ammeter pointer moved slowly on passing the current and slow revert to zero when disconnect current ?

Explain how the hot wire ammeter work ?

Moving coil ammeters are not valid to measure the value of

• A.C

• D.C

• battery

• all of above

state 4 basics structure of the hot wire ammeter

The pulley rotates and the pointer deflects along the scale( )

• true

• false