ntermediate Exam 2A Your android high efficieney transformer built into a stand.

Question

ntermediate Exam 2A Your android high efficieney transformer built into a stand. phone needs to be waterproof (wireless) so it recharges its battery via a plastic Here is what the charger(left)& phone (load at right) look like in the US: coated 10:1 Rioad @1A 11) What is the Voltage across the secondary coil in the US?ots You take your phone and charger with you to Australia, but you forgot to buy ada an electrical lice Springs, so you get out a pen knife and splice some wires from your 12 Volt DC truck battery, directly to the p don't sell them out where you are staying, which is quite a hike (100km) from rongs of your phones charger pad, hoping that will work. Here is what the charger and phone look like in Australia after your modifications: 10:1 12.0 V Rload when hooked up as shown? (Ignore turn on transients, the question is asking about long term steady state). 12) What is the power dissipated by the load resistor (your android phone) in Australia

Explanation / Answer

Solution) (11) we have

(N1/N2)=(V1/V2)

(10/1)=(120/V2)

V2=12 V

Voltage across secondary coil is 12 V

(12) the load resistor value is not given to find power dissipated. More over a transformer needs alternating current to function .

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