A constant magnetic field of 0.50 T is applied to a rectangular loop of area 3.0 × 10-3 m2. If the area of this loop changes from its original value to a new value of 1.6 × 10-3 m2 in 1.6 s, what is the emf induced in the loop?
A)
1.6 × 10-2 V
B)
0 V
C)
7.5 × 10-2 V
D)
4.4 × 10-4 V
E)
9.0 × 10-2 V
D
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Which of the following properties can be inferred from the star’s orbital period?
a. the planet’s orbital radius b. the planet’s mass c. both the planet’s orbital radius and it's mass d. neither the planet’s orbital radius nor it's mass
Two bulbs are shown in a circuit that surrounds a region of increasing magnetic field directed out of the page. When the switch is closed,
a.
bulb 1 glows more brightly.
b.
bulb 2 glows more brightly.
c.
both bulbs continue to glow with the same brightness.
d.
bulb 1 goes out.
e.
bulb 2 goes out.
A block is launched up an inclined plane. After going up the plane, it slides back down to its starting position. The coefficient of friction between the block and the plane is 0.3 . The time for the trip up the plane:
a. is the same as the time for the trip down. b. is more than the time for the trip down. c. is less than the time for the trip down. d. cannot be found compared without knowing the angle of inclination.
As a particle moves along the x axis it is acted upon by a single conservative force given by Fx = (20 - 4.0x) N where x is in m. The potential energy associated with this force has the value +30 J at the origin (x = 0). What is the value of the potential energy at x = 4.0 m?
a. -48 J b. +78 J c. -18 J d. +48 J e. +80 J