Questions from Modern Physics

Q: The minimum capacitance of a variable capacitor in a radio is 4

The minimum capacitance of a variable capacitor in a radio is 4.18 pF. (a). What is the inductance of a coil connected to this capacitor if the oscillation frequency of the L-C circuit is 1600 × 103...

Q: An L-R-C series circuit has L = 0

An L-R-C series circuit has L = 0.400 H, C = 7.00 µF, and R = 320 Ω. At t = 0 the current is zero and the initial charge on the capacitor is 2.80 × 10-4 C. (a). What are the values of the constants A...

Q: For the circuit of Fig. 30.17, let C

For the circuit of Fig. 30.17, let C = 15.0 nF, L = 22 mH, and R = 75.0 Ω. Fig. 30.17: (a). Calculate the oscillation frequency of the circuit once the capacitor has been charg...

Q: Magnetic fields within a sunspot can be as strong as 0.

Magnetic fields within a sunspot can be as strong as 0.4 T. (By comparison, the earth’s magnetic field is about 1/10,000 as strong.) Sunspots can be as large as 25,000 km in radius. The material in a...

Q: A uniform rectangular coil of total mass 212 g and dimensions 0

A uniform rectangular coil of total mass 212 g and dimensions 0.500 m × 1.00 m is oriented with its plane parallel to a uniform 3.00-T magnetic field (Fig. E27.43). A current of 2.00 A is...

Q: A very long, rectangular loop of wire can slide without friction

A very long, rectangular loop of wire can slide without friction on a horizontal surface. Initially the loop has part of its area in a region of uniform magnetic field that has magnitude B = 2.90 T an...

Q: In the circuit shown in Fig. P29.47, the

In the circuit shown in Fig. P29.47, the capacitor has capacitance C = 20 µF and is initially charged to 100 V with the polarity shown. The resistor R0 has resistance 10 â„&brv...

Q: In the circuit in Fig. P29.47, an emf

In the circuit in Fig. P29.47, an emf of 90.0 V is added in series with the capacitor and the resistor, and the capacitor is initially uncharged. The emf is placed between the capacitor and switch S,...

Q: (a). What would have to be the self-inductance

(a). What would have to be the self-inductance of a solenoid for it to store 10.0 J of energy when a 2.00-A current runs through it? (b). If this solenoid’s cross-sectional diameter is 4.00 cm, and i...

Q: In an ionic solution, a current consists of Ca2+ ions

In an ionic solution, a current consists of Ca2+ ions (of charge +2e) and Cl- ions (of charge -e) traveling in opposite directions. If 5.11 × 1018 Cl- ions go from A to B every 0.50 min, while 3.24 ×...