Chapter 34: Images
Problem 1 A moth at about eye level is 10 cm in front of a plane mirror; you are behind the moth, 30 cm from the mirror. For what distance must you focus your eyes to see the image of the moth in the mirror: that is, what is the di
Chapter 26: Current and Resistance
Problem 1 During the 4.0 minutes a 5.0-A current is set up in a wire, how many (a) coulombs and (b) electrons pass through any cross section across the wire's width? Answer (a) 1200 C. (b) 7.5 102 1. Solution (a) S
Chapter 23: Gauss' Law
Problem 1 The square surface shown in Fig. 23-26 measures 3.2 mm on each side. It is immersed in a uniform electric field with E = 1800 N/C. The field lines make an angle of 35 with a normal to the surface, as shown. Take the n
Chapter 36: Diffraction
Problem 3 Light of wavelength 633 nm is incident on a narrow slit. The angle between the first diffraction minimum on one side of the central maximum and the first minimum on the other side is 1.20. What is the width of the sl
Chapter 30: Induction and Inductance
Problem 1 In Fig. 30-37, the magnetic flux through the loop increases according to the relation B = 6t2 + 7t, where B is in milliwebers and t is in seconds. (a) What is the magnitude of the emf induced in the loop
Chapter 22: Electric Fields
Problem 1 In Fig. 22-30 the electric field lines on the left have twice the separation as those on the right. (a) If the magnitude of the field at A is 40 N/C, what force acts on a proton at A? (b) What is the magnitude of
Chapter 33: Electromagnetic Waves
Problem 3 A certain helium-neon laser emits red light in a narrow band of wavelengths centered at 632.8 nm and with a "wavelength width" (such as on the scale of Fig. 33-1) of 0.0100 nm. What is the corresponding "fr
Chapter 17: Waves - II
Problem 1 When the door of the Chapel of the Mausoleum in Hamilton, Scotland, is slammed shut, the last echo heard by someone standing just inside the door reportedly comes 15 s later. (a) If that echo were due to a single refl
Chapter 35: Interference
Problem 1 The speed of yellow light (from a sodium lamp) in a certain liquid is measured to be 1.92 108 m/s. What is the index of refraction of this liquid for the light? Answer 1.56 Solution The index of refraction is equal
Chapter 32: Maxwell's Equations; Magnetism of Matter
Problem 3 A Gaussian surface in the shape of a right-circular cylinder with end caps has a radius of 12.0 cm and a length of 80 cm. Through one end there is an inward magnetic flux of 25.0 Wb. At t
Chapter 29: Magnetic Fields Due to Currents
Problem 3 A surveyor is using a magnetic compass 6.1 m below a power line in which there is a steady current of 100 A. (a) What is the magnetic field at the site due to the power line? (b) Will this interfe
Chapter 28: Magnetic Fields
Problem 1 An electron that has a velocity given inby v = (2.0 106 i m/s) + (3.0 106 j m/s) moves through a uniform magnetic field B = 0.030 T i - 0.15 T j. (a) Find the force on the electron due to the magnetic field. (b
Chapter 27: Circuits
Problem 1 A wire of resistance 5.0 is connected to a battery whose emf E is 2.0 V and whose internal resistance is 1.0 . In 2.0 min, how much energy is (a) transferred from chemical to electrical form in the battery, (b) dissipa
Chapter 25: Capacitance
Problem 2 The capacitor in Fig. 25-26 has a capacitance of 25 F and is initially uncharged. The battery provides a potential difference of 120 V. After switch S is closed, how much charge will pass through it? Answer 3.0 mC.
Chapter 24: Electric Potential
Problem 2 The electric potential difference between the ground and a cloud in a particular thunderstorm is 1.2 109 V. What is the magnitude of the change in the electric potential energy (in multiples of the electron-v
Chapter 21: Electric Charge
Problem 3 A particle of charge +3.00 10 6 C is 12.0 cm distant from a second particle of charge -1.50 10 6 C. Calculate the magnitude of the electrostatic force on each charge. Answer 2.81 N Solution The magnitude of the
Chapter 16: Waves - I
Problem 1 A wave has an angular frequency of 110 rad/s and a wavelength of 1.80 m. Calculate (a) the angular wave number and (b) the speed of the wave. Answer (a) 3.49 m-1; (b) 31.5 m/s Solution (a) The angular wave number is k