Questions from Electronics


Q: A parallel-plate capacitor C , with plate separation d,

A parallel-plate capacitor C , with plate separation d, is given an initial charge (±)Q0. It is then connected to a resistor R, and discharges, Q(t) Q0e−t/RC . (a) What fraction of its initial energy...

See Answer

Q: Apply Eqs. 11.59 and 11.60 to the

Apply Eqs. 11.59 and 11.60 to the rotating dipole of Prob. 11.4. Explain any apparent discrepancies with your previous answer.

See Answer

Q: Let S be an inertial reference system. Use Galileo’s velocity addition

Let S be an inertial reference system. Use Galileo’s velocity addition rule. (a) Suppose that / moves with constant velocity relative to . Show that / is also an inertial referen...

See Answer

Q: A sailboat is manufactured so that the mast leans at an angle

A sailboat is manufactured so that the mast leans at an angle θ¯ with respect to the deck. An observer standing on a dock sees the boat go by at speed v (Fig. 12.14). What ang...

See Answer

Q: A record turntable of radius R rotates at angular velocity ω (

A record turntable of radius R rotates at angular velocity ω (Fig. 12.15). The circumference is presumably Lorentz-contracted, but the radius (being perpendicular to the velocity) is not. W...

See Answer

Q: Solve Eqs. 12.18 for x, y, z

Solve Eqs. 12.18 for x, y, z, t in terms of / and check that you recover Eqs. 12.19.

See Answer

Q: Sophie Zabar, clairvoyante, cried out in pain at precisely the

Sophie Zabar, clairvoyante, cried out in pain at precisely the instant her twin brother, 500 km away, hit his thumb with a hammer. A skeptical scientist observed both events (brother’...

See Answer

Q: For Theorem 2, show that (d) ⇒ (a

For Theorem 2, show that (d) ⇒ (a), (a) ⇒ (c), (c) ⇒ (b), (b) ⇒ (c), and (c) ⇒ (a).

See Answer

Q: (a) In Ex. 12.6 we found how

(a) In Ex. 12.6 we found how velocities in the x direction transform when you go from S to / Derive the analogous formulas for velocities in the y and z directions. (b) A spotlight is mounted on a boa...

See Answer

Q: You probably did Prob. 12.4 from the point of

You probably did Prob. 12.4 from the point of view of an observer on the ground. Now do it from the point of view of the police car, the outlaws, and the bullet. That is, fill in the ga...

See Answer