Answer:
field B = µ₀c I / 2πr
The field in the xy plane due to the fact that the two wires are perpendicular to the plane Bx and By are everywhere 0 on the plane.
a) Midway between, the Bz components cancel, so <0, 0, 0> T
b) Bz = µ₀ x I / 2πa + µ₀ x I / 2π(3a) = (µ₀ x I / 2π)(1/a + 1/3a)
Bz = (µ₀ x I / 2πr)(3/3a + 1/3a) = (µ₀x I / 2πr)(4 / 3a) = 2µ₀ x I / 3πa
c) By symmetry, Bz = -2µ₀ x I / 3πa (that is, down into the plane)
Answer:
Here, force=20N and displacement=10m
Work=Force×Displacement=20N×10m=200Nm
Yes it does. But not always
Answer:
a ) 270 N
b )413.65 N
Explanation:
weight of the refrigerator = reaction force ( R )
= mg
= 63 x 9.8
R = 617.4 N
Maximum friction possible
= coefficient of friction x R
= .67 X 617.4
= 413.65 N
When force 270 N is applied , due to friction, the body does not move .
The friction force adjusts itself to the external applied force to prevent the body to budge.
Hence the friction force acting in this situation = 270 N
b ) The maximum friction possible is 413.65 . If we apply a force equal to or exceeding 413.65 N , body will move. Hence 413.65 N is the answer.
The power consumed by the electric clothes dryer may be calculated by the following equation,
P = I x V
where P is the power, I is the current in amperes, and V is the voltage in volts. Substituting the known values from the given above,
P = (15 A)(240 V)
P = 3600 watts
Therefore, the power consumed by the electric clothes dryer is equal to 3600 watts.
