Transformers

Select the correct statement regarding Faraday's induction ring

• Faraday applied AC to the primary and observed AC in the secondary

• Faraday switched DC in the primary and obtain continuous AC in the secondary

• Faraday switched DC in the secondary and obtained spikes of DC in the primary detected using a compass needle

• Faraday switched DC in the primary and obtained spikes of DC in the secondary detected using a compass needle

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5

Which symbol corresponds to a transformer used at 50 Hz?

• 
• 
• 

Tags

NGSS.HS-PS3-5

Which transformer loss increases as the current drawn increases?

• Copper loss

• Eddy current loss

• Hysteresis loss

• Leakage flux loss

Which transformer loss increases the most as the frequency increases?

• Copper loss

• Eddy current loss

• Hysteresis loss

• Leakage flux loss

Which output voltage is NOT possible for this transformer?

• 9 V

• 15 V

• 18 V

• 23 V

• 33 V

Which text equation is correct for a double-wound transformer?

• Secondary current + no-load current = primary current

• Primary current = secondary current + no-load current

• Referred secondary current = primary current - no-load current

• no-load current = primary current + referred secondary current

Increasing the cross-sectional area of a DW 230 V transformer core:

• Allows a higher voltage to be applied

• Increases the secondary voltage

• Increases the core flux density

• Reduces the flux in the core

The dot notation:

• ensures the magnetic field around a current-carrying conductor can be identified

• identifies the transformer input terminals

• identifies the transformer output terminals

• ensures the output and input can be

  in-phase

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5