Object 1 has twice the mass of Object 2 . Each of the objects has the same magnitude of momentum. Which of the following statements is true?
a. Both objects can have the same kinetic energy.
b. One object has 0.707 times the kinetic energy of the other.
c. One object has twice the kinetic energy of the other.
d. One object has 4 times the kinetic energy of the other.
[Ques. 2] Electric field is dimensionally equivalent to which of the following?
a. N/C2
c. Nm2/C2
b. Nm/C
d. N/C
[Ques. 3] The kinetic energy of an object is quadrupled. Its momentum will change by what factor?
a. zero
c. eight
b. two
d. four
[Ques. 4] Two point charges are separated by 10.0 cm and have charges of +1.00 C and -1.00 C, respectively. What is the electric field at a point midway between the two charges? (ke = 8.99 109 Nm2/C2)
a. 14.4 106 N/C
c. 28.8 106 N/C
b. zero
d. 7.19 106 N/C
[Ques. 5] If the momentum of an object is tripled, its kinetic energy will change by what factor?
a. zero
c. three
b. onethird
d. nine
[Ques. 6] Two point charges each have a value of 30.0 mC and are separated by a distance of 3.00 cm. What is the electric field midway between the two charges? (ke = 8.99 109 Nm2/C2)
a. 40.5 107 N/C
c. zero
b. 20.3 107 N/C
d. 10.1 107 N/C
[Ques. 7] Two masses m1 and m2, with m1 > m2, have momenta with equal magnitudes. How do their kinetic energies compare?
a. KE1 < KE2
c. KE1 > KE2
b. KE1 = KE2
d. More information is needed.
[Ques. 8] The beam of electrons that hits the screen of an oscilloscope is moved up and down by:
a. varying the electron's charge.
b. electrical charges on deflecting plates above and below the beam.
c. gravity.
d. a phosphorescent coating.
[Ques. 9] Object 1 has twice the mass of Object 2 . Both objects have the same kinetic energy. Which of the following statements is true?
a. Both objects can have the same magnitude of momentum.
b. Object 1 has a momentum of greater magnitude than Object 2.
c. The magnitude of the momentum of Object 2 is four times that of Object 1.
d. All the statements are false.
[Ques. 10] Charges q, q, and q are placed on the x axis at x = 0, x = 2 m, and x = 4 m, respectively. At which of the following points does the electric field have the greatest magnitude?
a. x = 3 m
b. x = 1 m
c. x = 5 m
d. The electric field has the same magnitude at all three positions.
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