ECA2

If the voltage is 12 V and current is 5A, then the power is ____________

• 48W
• 0.48W
• 4800W
• none

Internal resistance of Practical current source is _______.

• Zero
• 1
• less value
• high value

An ideal voltage source should have ______

• Zero internal resistance
• Infinite internal resistance
• Terminal voltage is proportional to current
• All the above

An ideal current source is that which has an internal resistance of ________________Ohm.

• Zero
• High
• Low
• Infinite

A practical current source should have internal resistance of ___________ Ohm.

• Zero
• Low
• High
• Infinite

A 30V voltage source in series with resistance of 6 ohms can be transformed to equivalent current source of _____________.

• 5A in series with 6 ohms
• 5A in parallel with 6 ohms
• 30A in parallel with 6 ohms
• none

A 5A current source in parallel with resistance of 6 ohms can be transformed to equivalent voltage source of ______________.

• 30V in series with 6 ohms
• 30V in parallel with 6 ohms
• 15A in parallel with 6 ohms
• none

A delta connection contains three equal resistances R. The resistances of equivalent star connection -------

• R/3, R/3,R/3
• 3R, 3R,R/4
• R/3, R/3,R/5
• R/3, R/3,R/6

A star connection contains three equal resistances R. The resistances of equivalent delta connection -----------------

• 6R.6R,6R
• 3R,3R,3R
• 6R, 9R,27R
• none

A star connection contains three identical resistances of 9 ohms. The resistances of equivalent delta connection will be ………

• 9ohms,9ohms,9ohms
• 3 ohms,3 ohms,3 ohms
• 27 ohms,27 hms,27 ohms
• none