Answer:
Option D: 21.8 degrees
Explanation:
In a parallel RL circuit, the current in the resistor R and that in the inductor L are separated among themselves 90 degrees as illustrated in the attached image. In the image the current in the resistor is represented in orange, that of the inductor in blue, and the total current (vector addition of the previous two) is represented in red, forming a certain angle (theta) with respect to the current in the resistor. The output voltage is the same as the input voltage as measured over the resistor R.
Therefore, the phase angle that separated output voltage and total current can be obtained using the fact that tan(phase angle) = 
, therefore the angle is the arctangent of 4/10:
degrees.
0.56 A is the current of the secondary coil.
transformer is the device that transfer electric energy from one AC circuit to another.
we know that ;
I ∝ 1/n;
where I IS CURRENT and n is NUMBER OF TURNS.
(I) secondary = X A
(n) secondary = 100
(I) primary = 0.04 A
(n) primary = 1400
USING THIS-----> I ∝ 1/n;
=>
0.04 A/X A =100/1400
=>X=0.56 A
as the current in the transformer is inversely proportional to the number of turns so 0.56 A is the current in the secondary coil.
learn more about transformers-
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Answer:
potential energy which later on gets converted to kinetic energy of an object
I believe A is the correct answer!!
Answer:
B. 75V
Explanation:
The formula for Voltage across and Inductor is given as:
Vr.m.s = Ir.m.s × XL
Where
Ir.m.s : Current across the inductor
XL = 2πFL
In the question we were given values
Ir.m.s = 0.20A
F = 750Hz
L = Inductance = 0.080H
Vr.m.s = 0.20 × ( 2 × π× 750Hz × 0.080H)
Vr.m.s= 0.20 × 376.99111843
Vr.m.s = 75.389223686volts
Approximately = 75volts
Therefore, the voltage across the inductor is 75 volts.
