A 150-W lightbulb emits 5% of its energy as electromagnetic radiation. What is the radiation pressure on an absorbing sphere of radius 10 m that surrounds the bulb?

Show that the magnetic field at a distance r from the axis of two circular parallel plates, produced by placing charge Q(t) on the plates is $B _ { \text { ind } } = \frac { \mu _ { 0 } } { 2 \pi r } \frac { d Q ( t ) } { d t }$.

If you wish to detect details of the size of atoms (about 0.2 nm) with electromagnetic radiation, it must have a wavelength of about this size. (a) What is its frequency? (b) What type of electromagnetic radiation might this be?

A step-up transformer connected to a 110-V line is used to supply a hydrogen-gas discharge tube with 5.0 kV (rms). The tube dissipates 75 W of power. (a) What is the ratio of the number of turns in the secondary winding to the number of turns in the primary winding? (b) What are the rms currents in the primary and secondary windings? (c) What is the effective resistance seen by the 110-V source?

Electromagnetic radiation from a 5.00-mW laser is concentrated on a $1.00 - \mathrm { mm } ^ { 2 }$. (a) What is the intensity in $\mathrm { W } / \mathrm { m } ^ { 2 }$? (b) Suppose a 2.00-nC electric charge is in the beam. What is the maximum electric force it experiences? (c) If the electric charge moves at 400 m/s, what maximum magnetic force can it feel?

A $150~\mathrm{W}$ lightbulb emits $5 \%$ of its energy as electromagnetic radiation. What is the radiation pressure on an absorbing sphere of radius $10 \mathrm{~m}$ that surrounds the bulb?

Identify and Explain: executive agreement, political party, cabinet

The resonant frequency of an RLC series circuit is $2.0 \times 10 ^ { 3 } \mathrm { Hz }$. If the self-inductance in the circuit is 5.0 mH, what is the capacitance in the circuit?

If the Sun suddenly turned off, we would not know it until its light stopped coming. How long would that be, given that the Sun is $1.50 \times 10^{11}\ \mathrm{m}$ away?

Calculate the rms currents for an ac source is given by $v ( t ) = V _ { 0 } \sin \omega t$ where $V _ { 0 } = 100 \mathrm { V }$ and $\omega = 200 \pi \mathrm { rad } / \mathrm { s }$ when connected across (a) a $20 - \mu \mathrm { F }$ capacitor, (b) a 20-mH inductor, and (c) a resistor.

At what distance does a 100-W lightbulb produce the same intensity of light as a 75-W lightbulb produces 10 m away? (Assume both have the same efficiency for converting electrical energy in the circuit into emitted electromagnetic energy.)

An incandescent light bulb emits only 2.6 W of its power as visible light. What is the rms electric field of the emitted light at a distance of 3.0 m from the bulb?

Calculate the reactance of a 5.0-mH inductor at (a) 60 Hz, (b) 600 Hz, and (c) 6000 Hz.

One way to find out if a wire has corroded is to measure its resistance. Explain why the resistance of a wire increases if it becomes corroded.