Answer:
386.6 A
Explanation:
We are given;
Solenoid length; L = 10 cm = 0.1 m
Number of turns; N = 247
Magnetic field; B = 1.2 T
Now, at the centre of a long solenoid of N turns/metre carrying a current(I), the formula for the magnetic field is given as;
B = μ_oNI/L
Making I the subject we have;
I = BL/μ_oN
Where μ_o is the vacuum of permeability and has a constant value of 4π × 10^(−7) H/m
Thus;
I = (1.2 × 0.1)/(4π × 10^(−7) × 247)
I = 386.6 A
By definition,
q = 1.22y/D
Where,
q = min. angle
y = wavelength
D = Aperture diameter = diameter of the antenna
At distance "x" from the antenna,
L =xq = 1.22xy/D
Where, L = Min. distance
But, y =c/f = (3*10^8)/(16*10^9) = 0.01875 m
Substituting;
L = 1.22*5*10^3*0.01875/2.1 = 54.46 m
Answer: 0.0267m/s
Explanation: Wave speed in m/s
Speed = Distance/Time
Substitute the given values into the formula
Speed = 0.1/3.75
Speed = 0.0267m/s
Answer:
H = 6.93 m
Explanation:
given data
velocity v = 35 m/s
horizontal component Vx = 33 m/s
solution
we get here maximum height so first we get vertical component here that is express as
Vy = 
.........................1
put here value
Vy = 
Vy = 11.66 m/s
and
now we get height
H = 
.............................2
put here value
H = 
H = 6.93 m
