A sinusoidal electromagnetic wave is propagating in vacuum. At a given point P and at a particular time, the electric field is in the +x direction and the magnetic field is in the -y direction
(a) What is the direction of propagation of the wave? (b) If the intensity of the wave at point P is 0.36 W/m2, what is the electric field amplitude at that point? (c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T • m/A, ?0 = 8.85 × 10-12 C2/N • m2)
(a) -z direction (b) 16 V/m
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A helium nucleus (charge = 2e, mass = 6.63 × 10^-27 kg) traveling at 6.20 × 10^5 m/s enters an electric field, traveling from point A, at a potential of 1.50 × 10^3 V, to point B, at 4.00 × 10^3 V. What is its speed at point B?
1.7.91 × 10^5 m/s 2.3.78 × 10^5 m/s 3.2.13 × 10^5 m/s 4.2.52 × 10^6 m/s 5.3.01 × 10^8 m/s
An object that has zero resistance is a __________
Fill in the blank(s) with correct word
What are two important properties that determine the pressure drop of a fluid passing through a compact heat exchanger?
What will be an ideal response?
A current loop is oriented in three different positions relative to a uniform magnetic field. In position 1 the plane of the loop is perpendicular to the field lines. In position 2 and 3 the plane of the loop is parallel to the field as shown. The torque on the loop is maximum in
a.
position 1.
b.
position 2.
c.
position 3
d.
positions 2 and 3.
e.
all three positions.