A special rapeseed oil popular as a cooking oil is: (A) palm oil; (B) Canola oil

Question

A special rapeseed oil popular as a cooking oil is: (A) palm oil; (B) Canola oil; (C) mustard oil; (D) Mazolla oil; (E) sunflower oil. A three-way light bulb can be constructed by putting two resistances in parallel. Whether the first, second, or both resistances are placed in the circuit, the light can be dim, bright, or very bright. What are the values for the two resistances if the light bulb can be operated to dissipate 50/100/150 W of electricity ? ________________ An ideal transformer has 150 turns on the primary winding and 600 turns on the secondary. If the primary is connected across a 110 V generator, what is the output voltage? _________________

Explanation / Answer

10. (c) Mustard Oil.

12. The transformer equation is:

Vs / Vp = Ns / Np;

where, Vs-> secondary voltage= ?

Vp-> primary voltage =110V

Ns-> secondary turns=600

Np->primary turns = 150

So, Vs = (Ns / Np) Vp

= (600/150)110

= 440 V (ans)

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