Conceptual Physics

29.0 - Introduction It was a chance occurrence that led the British scientist Michael Faraday (1791- 1867) to discover electroma ...

of a circuit, the emf causes an induced current to flow. Remember that the units of emf are volts, the same as for potential dif ...

29.4 - Physics and music: electric guitars Electric guitars use electromagnetic induction in a component called a pickup to prod ...

Use the relationship between field strength, potential difference and distance in a uniform electric field to rewrite E, and th ...

ĭB = B · A ĭB = BA cos ș ĭB = magnetic flux B = magnetic field, A = area vector ș = angle between field, area vector Units: webe ...

equals the product of the magnetic field strength, the surface area of a loop, and the number of loops in the coil. The current ...

Ǜ = í(6 loops)(0.15 V) = í0.90 V 29.8 - Interactive problem: Faraday’s law In this simulation, a magnetic field is passing throu ...

directed toward you. Remember: The current must flow so that it creates a magnetic field inside the loop that opposes this decre ...

whole wheel, acting to slow it down. Since the magnitude of the countertorque is proportional to the angular velocity of the whe ...

29.13 - Interactive problem: alternating current In this simulation, there is a circuit that contains a signal generator and a r ...

constant and it will cease to induce an emf or a current in the circuit on the right. If the current on the left-hand side were ...

Variables Strategy State Faraday’s law twice, for the emf induced across each coil by the changing magnetic flux. The emf equal ...

29.16 - Sample problem: primary winding in a transformer Low-voltage devices like the game console above typically run on direct ...

the potential difference of the alternating current varies sinusoidally with time. There are ten loops in the top coil. You can ...

Chapter Assumptions Unless stated otherwise, use 5.00×10–5 T for the strength of the Earth's magnetic field at its surface. Elem ...

the top circuit is changing? (c) Does the rate at which the current in the top circuit changes have any effect on the potential ...

6.2 A wire circle of radius 0.050 m is embedded in a solenoid of length 0.20 m with 1000 turns that carries a current of 0.50 A. ...

13.2 Use the oscilloscope in the simulation in the interactive problem in this section to determine (a) Imax, (b) ǻVmax and (c) ...

30.0 - Introduction Radio and television signals, x-rays, microwaves: Each is a form of electromagnetic radiation. If steam and ...

signals. AM and FM radio waves are typically produced by transmitters that incorporate electric oscillator circuits attached to ...