You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Power, Force and Velocity

Which one of ...

Question

Which one of the following power source characteristics is most suitable for manual arc welding is

V = 20 - 0.1 I

No worries! We‘ve got your back. Try BYJU‘S free classes today!

V = 20 - 0.2 I

No worries! We‘ve got your back. Try BYJU‘S free classes today!

V = 80 - 0.8 I

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

V = 80 - 0.1 I

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $V = 80 - 0.8 I$
$For manual arc welding constant current source is preferred.$
$So, the one which is having higher negative slope (\frac{d V}{d I}) is the better.$

Suggest Corrections

Similar questions

Q. The

D C

power source for arc welding has the characteristic

3 V + I = 240

. where

V =

Voltage and

I =

Current in an amp. For maximum arc power at the electrode, voltage should be set at

Q. In gas metal arc welding, the power source characteristics is

V_{p} = 36 - \frac{I}{60}

and the arc characteristics is

V_{a} = 2 l_{a} + 27

.
Where '

V_{p}

' and '

V_{a}

' are voltage, 'I' is current and l

_{a}

is arc length in mm. The change in power (VA) of the arc, if the arc length is changed from 3 mm to 4 mm is

Q. In a

D C

arc welding operation, the voltage length characteristic was obtained as

V_{a r c} = 20 + 5 l

where the arc length

l

was varied between

5 m m

and

7 m m

. Here

V_{a r c}

denotes the arc voltage Volts. The arc current was varied from

400 A

and

599 A

. Assuming linear power source characteristic, the open circuit voltage and the short circuit current for the welding operation is

Q. A direct current welding machine with a linear power source characteristic provides open circuit voltage of

80 V

and short circuit current of

800 A

. During welding with the machine, the measured arc current is

500 A

corresponding to an arc length of

5.0 m m

and the measured arc current is

460 A

corresponding to an arc length of

7.0 m m

. The linear voltage

(E) -

arc length

(L)

characteristic of the welding arc can be given as (where

E

is in Volt and

L

is in

m m

)

Q. The voltage-arc length characteristics of a power source is V = 25+30L, where V is the operating voltage in volts and L = arc length in cm. The open circuit voltage and short circuit current for arc lengths ranging from 4 to 6 mm and for current ranging from 700 to 1000 amps during welding operation are

Join BYJU'S Learning Program

Which one of the following power source characteristics is most suitable for manual arc welding is

The correct option is C V=80−0.8IFor manual arc welding constant current source is preferred. So, the one which is having higher negative slope (dVdI) is the better.

The correct option is C $V = 80 - 0.8 I$
$For manual arc welding constant current source is preferred.$
$So, the one which is having higher negative slope (\frac{d V}{d I}) is the better.$