Questions from College Physics

Q: A uniform magnetic field of magnitude 0.50 T is directed

A uniform magnetic field of magnitude 0.50 T is directed perpendicular to the plane of a rectangular loop having dimensions 8.0 cm by 12 cm. Find the magnetic flux through the loop.

Q: The switch S in Figure 20.27 is closed at t

The switch S in Figure 20.27 is closed at t = 0 and the current at a reference time tref > 0 is Iref. If the circuit is changed as described below and the switch is again closed at t = 0, determine...

Q: The AM band extends from approximately 500. kHz to 1600.

The AM band extends from approximately 500. kHz to 1600. kHz. If a 2.0 - μH inductor is used in a tuning circuit for a radio, what are the extremes that a capacitor must reach to cover the complete ba...

Q: Figure P21.4 shows three lamps connected to a 120.

Figure P21.4 shows three lamps connected to a 120. - V AC (rms) household supply voltage. Lamps 1 and 2 have 150 - W bulbs; lamp 3 has a 100. - W bulb. For each bulb, find (a) The rms current and (b)...

Q: Electrosurgical units (ESUs) supply high - frequency electricity from resonant

Electrosurgical units (ESUs) supply high - frequency electricity from resonant RLC circuits to cut, coagulate, or otherwise modify biological tissue. (a) Find the resonant frequency of an ESU with an...

Q: Two electrical oscillators are used in a heterodyne metal detector to detect

Two electrical oscillators are used in a heterodyne metal detector to detect buried metal objects (see Fig. P21.41). The detector uses two identical electrical oscillators in the form of LC circuits h...

Q: A series circuit contains a 3.00 - H inductor,

A series circuit contains a 3.00 - H inductor, a 3.00 - mF capacitor, and a 30.0 - V resistor connected to a 120. - V (rms) source of variable frequency. Find the power delivered to the circuit when t...

Q: The primary coil of a transformer has N1 = 250. turns

The primary coil of a transformer has N1 = 250. turns and its secondary coil has N2 = 1500. turns. If the input voltage across the primary coil is Δv = (170. V) sin ωt, what rms voltage is developed a...

Q: A 24.0 – kΩ resistor connected to an AC voltage

A 24.0 – kΩ resistor connected to an AC voltage source dissipates an average power of 0.600 W. (a) Calculate the rms current in the resistor. (b) Calculate the rms voltage of the AC source.

Q: The output voltage of an AC generator is given by Δv =

The output voltage of an AC generator is given by Δv = (170 V) sin (60πt). The generator is connected across a 20.0 - Ω resistor. By inspection, what are the (a) Maximum voltage and (b) Frequency? Fin...