Which of the following choices does not correctly match a fundamental interaction with its mediating particles? A. strong: gluons, B. electromagnetic: electrons, C. weak: W and Z bosons, D. gravitational: gravitons.

The maximum values for the current and potential difference in an ac circuit are 3.5 A and 340 V, respectively. How much power is dissipated in this circuit? F. 300 W, G. 600 W, H. 1200 W, J. 2400 W.

Which of the following would not increase the emf produced by a generator? A. rotating the generator coil faster, B. increasing the strength of the generator magnets, C. increasing the number of turns of wire in the coil, D. reducing the cross-sectional area of the coil.

In classical physics, the accuracy of measurements has always been limited by the measuring instruments used, and no instrument is perfect. How is this limitation different from that formulated by Heisenberg in the uncertainty principle?

How does Einstein’s theory that electromagnetic waves are quantized explain the fact that the frequency of light (rather than the intensity) determines whether electrons are ejected from a photosensitive surface?

Describe the conflict known as the ultraviolet catastrophe. How did Planck resolve this conflict? How does Planck’s assumption depart from classical physics?

What concepts did Maxwell use to help create his theory of electricity and magnetism? What phenomenon did Maxwell’s equations predict?

The rms current that a single coil of an electric guitar produces is 0.025 mA. The coil's resistance is $4.3 \mathrm{k} \Omega$. What is the maximum instantaneous current? What is therms emf produced by the coil? What is the maximum emf produced by the coil?

The rms current that a single coil of an electric guitar produces is 0.025 mA. The coil’s resistance is 4.3 $\mathrm{k} \Omega$. What is the maximum instantaneous current? What is the rms emf produced by the coil? What is the maximum emf produced by the coil?

Explain what would happen if a commutator were not used in a motor.

A loop with 37 turns and an area of 0.33 m2 is rotating at 281 rad/s. The loop's axis of rotation is perpendicular to a uniform magnetic field with a strength of 0.035 T. What is the maximum emf induced? (Hint: Use the expression maximum $\mathrm{emf}=N A B \omega$.)

A particle with a charge of 0.030 C experiences a magnetic force of 1.5 N while moving at right angles to a uniform magnetic field. If the speed of the charge is 620 m/s, what is the magnitude of the magnetic field the particle passes through?

Which is the weakest of the four fundamental interactions? F. electromagnetic, G. gravitational, H. strong, J. weak.

Explain the main differences between alpha, beta, and gamma emissions.