Answer:
1. The number of turns on the secondary output is 18
2. The root mean square power delivered to the transformer is 48 Watts.
Explanation:
A transformer is an electronic device that can be used for increasing or decreasing the value of a given voltage. It consists of primary coils and secondary coil of a definte number of turns. When voltage flows in the primary coil, it induces voltage in the secondary coil. The two types are: step-up and step down transformers.
1. For a given transformer,
= 
where 
is the value of the induced voltage in the secondary coil, 
is he voltage in the primary coil, and 
is the number of turns of the secondary coil, 
is the number of turns in the primary coil.
From the question,
= 9.0 V, = 120 V, = 240, = ?
So that,
= 
= 
= 18
The number of turns on the secondary output is 18.
2. 
= 
× 
= 0.4 × 120
= 48 W
The rms power delivered to the transformer is 48 Watts.
Answer:
57.1 km/hr
Explanation:
To find the average speed you take the total distance divided by the total elapsed time.
So, the total distance is 140 + 60 = 200
the total elapsed time is found by taking 140/70=2 and 60/40=1.5
2+1.5=3.5
The plug the numbers into the equation,
200/3.5=57.1
Answer:
43.88 meters per second
Explanation:
The computation of the speed is shown below:
As we know that
where,
Distance is 395,000 meters
Time is 9,000 seconds
Now placing these values to the formula
So, the speed is
= 43.88 meters per second
As speed shows the relation between the distance and time and the same is to be considered i.e by applying the formula
