Questions from Modern Physics

Q: Is it possible to connect resistors together in a way that cannot

Is it possible to connect resistors together in a way that cannot be reduced to some combination of series and parallel combinations? If so, give examples. If not, state why not.

Q: The battery in the circuit shown in Fig. Q26.14

The battery in the circuit shown in Fig. Q26.14 has no internal resistance. After you close the switch S, will the brightness of bulb B1 increase, decrease, or stay the same? Fig. Q26.14:

Q: Could an accelerator be built in which all the forces on the

Could an accelerator be built in which all the forces on the particles, for steering and for increasing speed, are magnetic forces? Why or why not?

Q: Two identical, closely wound, circular coils, each having self

Two identical, closely wound, circular coils, each having self-inductance L, are placed next to each other, so that they are coaxial and almost touching. If they are connected in series, what is the s...

Q: Identical light bulbs A, B, and C are connected as

Identical light bulbs A, B, and C are connected as shown in Fig. Q26.16. When the switch S is closed, bulb C goes out. Explain why. What happens to the brightness of bulbs A and B? Explain. Fig. Q26....

Q: The emf of a flashlight battery is roughly constant with time,

The emf of a flashlight battery is roughly constant with time, but its internal resistance increases with age and use. What sort of meter should be used to test the freshness of a battery?

Q: In a Hall-effect experiment, is it possible that no

In a Hall-effect experiment, is it possible that no transverse potential difference will be observed? Under what circumstances might this happen?

Q: A long, straight wire lies along the y-axis and

A long, straight wire lies along the y-axis and carries a current I = 8.00 A in the -y-direction (Fig. E28.21). In addition to the magnetic field due to the current in the wire, a uniform magnetic fie...

Q: Verify that the time constant RC has units of time.

Verify that the time constant RC has units of time.

Q: For very large resistances it is easy to construct R-C

For very large resistances it is easy to construct R-C circuits that have time constants of several seconds or minutes. How might this fact be used to measure very large resistances, those that are to...