Answer:
The motorist average speed for the trip is 88 km/h
Explanation:
In order to know her average speed, we have to refer to the following ecuation:
<V> (average speed) =
So, according to that, we know that the motorist has been having a speed of 80km/h during 3 hours, and a speed of 100 km/h during 2 hours. It means that her speed during all the travel is 5 hours.
Then, we have to affect the 5 hours to the inicial and final speed as follows:
First, at 80 km/h, she travels during 2 hours so:
3h*80km/h= 240 km
And then, at 100 km/h:
2h*100km/h= 200 km
Which leads us to:
initial speed: 240 km/ 5 h= 48 km/h
and final speed of: 200 km/ 5 h= 40 km/h
Then, the average speed is:
<V> = 48 km/h + 40 km/h = 88 km/h
Explanation:
It is given that,
Number of turns in primary coil,
Number of turns in secondary coil,
Voltage in primary coil,
Current in primary coil,
We have to find the voltage and current in the secondary coli. Firstly calculating the voltage in secondary coil as :
Now, calculating the current present in the secondary coil as :
<em>Hence, this is the required solution.</em>
Answer:
The ratio of the acceleration of the proton to that of the deuteron is 2
Explanation:
For a moving charge in magnetic field, the magnetic force is balanced by force due to its motion. So,
Acceleration of proton,
.........(1)
Acceleration of deuteron,
..........(2)
Since, a deuteron has the same charge as the proton but has twice its mass.
Dividing equation (1) and (2) we get :
So, the ratio of the acceleration of the proton to that of the deuteron is 2. Hence, the correct option is (a).