Answer:
No. of turns in secondary coil are 5.
Transformer Type: STEP DOWN TRANSFORMER
Explanation:
The relationship of the no. of turns in transformer secondary and primary coils with their voltages is known as the turn ration. The formula for turns ratio is as follows:
Np/Ns = Vp/Vs
where,
Np = No. of turns in primary coil = 40
Ns = No. of turns in secondary coil = ?
Vp = Voltage supplied to primary coil = 120 V
Vs = Voltage output of secondary coil = 15 V
Therefore,
40/Ns = 120 V/15 V
Ns = 40/8
<u>Ns = 5</u>
TYPE OF TRANSFORMER:
Since, this transformer decreases the voltage value at the output. Hence it is a <u>STEP DOWN TRANSFORMER.</u>
They both exert an equal amount of force onto each other
Answer:
R2= 470 ohms R1= 10ohms. Schematic is attached
Explanation:
Av=-(R2/R1)
-47=-(470/10)
-47=-47
The final velocity of the man standing on roller skates with the ball caught, after it is thrown at him at a speed of 5 m/s, is 0.042 m/s.
The velocity of the man with the ball can be calculated by conservation of linear momentum:
Where:
: is the mass of the ball = 0.5 kg
: is the <u>mass</u> of the man = 59.5 kg
: is the initial velocity of the <u>ball</u> = 5 m/s
: is the <u>initial velocity</u> if the <u>man</u> = 0 (he is standing still)
: is the final velocity of the <u>ball</u> =?
: is the <u>final velocity</u> of the <u>man</u> =?
Since the man catches the ball, his final velocity is the same that the final ball's velocity, so:
Therefore, the velocity of the man with the ball is 0.042 m/s.
Learn more about the conservation of linear momentum here:
I hope it helps you!
