transformer

This picture is an example of a ________________.

• Motor

• Generator

• Step-up transformer

• Step-down transformer

Tags

NGSS.HS-PS3-3

Which of the following does not change in a transformer?

• Voltage

• Current

• Frequency

The winding which is connected to the supply side is called the ....... winding.

• primary

• secondary

• tertiary

Which one is not the condition for ideal transformer.

• Resistance of primary and secondary winding must be zero

• Leakage flux must be zero.

• Permeability must be zero.

• core losses must be zero

define form factor

• $\frac{rms\ value}{average\ value}$ for sine wave form factor =1.11

• $\frac{average\ value}{rms\ value}$ for sine wave form factor =1.11

definition of cycle (read the options carefully)

• one complete set of positive and negative values of alternating quantity

• one complete set of positive or negative values of alternating quantity

Relation between time period, T and frequency,f

• $T=\frac{1}{f}$

• T=f

Transformer works on the principle of

• mutual induction

• self induction

• superposition theorem

select voltage transformation ratio of trasnformer

• $\frac{E_2}{E_1}=\frac{N_2}{N_1}=k$

• $\frac{E_2}{E_1}=\frac{N_1}{N_2}=k$

select emf equation of transformer

• $rms\ value\ of\ induced\ emf\ E=4.44fN\phi_m$

• $average\ value\ of\ induced\ emf\ E=4.44fN\phi_m$

• $rms\ value\ of\ induced\ emf\ E=4.44fNB_m$