It's the second one that the answer
Answer:
The force each one experienced
Explanation:
Hope this helps :)
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Answer:
Explanation:
a ) No of turns per metre
n = 450 / .35
= 1285.71
Magnetic field inside the solenoid
B = μ₀ n I
Where I is current
B = 4π x 10⁻⁷ x 1285.71 x 1.75
= 28.26 x 10⁻⁴ T
This is the uniform magnetic field inside the solenoid.
b )
Magnetic field around a very long wire at a distance d is given by the expression
B = ( μ₀ /4π ) X 2I / d
= 10⁻⁷ x 2 x ( 1.75 / .01 )
= .35 x 10⁻⁴ T
In the second case magnetic field is much less. It is due to the fact that in the solenoid magnetic field gets multiplied due to increase in the number of turns. In straight coil this does not happen .
Answer:
3.6 Ω
Explanation:
Resistance: This is defined as the opposition to the flow of current in an electric circuit. The S.I unit of Resistance is Ohm's (Ω).
From the question above,
Applying Ohm's law
V = IR...................... Equation 1
Where V = Voltage, I = current registered by the ammeter, R = Resistance.
make R the subject of the equation
R = V/I............... Equation 2
Given: V = 9 V, I = 2.5 A
Substitute into equation 2
R = 9/2.5
R = 3.6 Ω
Hence the resistance of the wire = 3.6 Ω
