The standard theory does not include which interaction?
A. electromagnetic
B. gravitational
C. weak
D. strong
E. It contains all of these choices.
B. gravitational
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Suppose a uniform electric field of 4 N/C is in the positive x direction. When a charge is placed at and fixed to the origin, the resulting electric field on the x axis at x = 2 m becomes zero. What is the magnitude of the electric field at x = 4 m on the x axis at this time?
A. 0 B. 1 N/C C. 2 N/C D. 4 N/C E. More information is needed to find the resulting field magnitude at this position.
Magnetic fields are produced by
a. constant electric currents. b. electric currents that vary sinusoidally with time. c. time-varying electric fields. d. all of the above. e. only (a) and (b) above.
An alternating current circuit has resistance R, inductance L and capacitance C in series with a voltage source. Which statement is correct?
a. The voltage across the capacitor leads the voltage across the inductor by 90°. b. The voltage across the inductor leads the voltage across the capacitor by 90°. c. The voltage across the inductor leads the voltage across the resistor by 180°. d. The voltage across the inductor is out of phase with the voltage across the capacitor by 180°. e. Both voltages lead the voltage across the resistor by 90°.
A gas is placed in a thermally insulated container as shown below
As the piston is slowly lowered, the applied force F...