Q5. A solenoid of length 100 cm is wound uniformly with 10 000 turns of wire. It carries a current of 4 A. What is the value of following?
i. Magnetic field on the axis of the solenoid at the center.
ii. Magnetic field on the axis at the end.

i) 0.05 T

ii) 0.025 T

Explanation:

current I = 4 A

length of solenoid L = 100 cm = 1 m

number of turns N = 10000 turns

number of turns per unit length n = N/L = 10000/1 = 10000 turns/meter

i) magnetic field on the axis of the solenoid at the center

B = μ

where μ is vacuum permeability = 4π×10−7 H/m = 1.256 x H/m

B =  1.256 x x  10000 x 4 = 0.05 T

ii) magnetic field on the axis at the end will be equal to

B = (μ) ÷ 2

this is based on the assumption that the length of the solenoid is far greater than than the diameter of the solenoid. Therefore,

B = 0.05 ÷ 2 = 0.025 T

which statement best describes why a government’s actions are important in macroeconomics? check all that apply.

1 government controls industry through policy.

2 government is both a consumer and a producer.

3 government can prevent changes and challenges.

4 government can use policy to influence the economy.

5 government can accurately predict economic trends.

1 , 2 & 4 for edgenu

according to this graph, how does supply behave in the long run?

a ]output remains constant.

b ]output increases.

c ]output cannot be predicted.

d ]output decreases.

the answer is a ]   for edgenu