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Chapter 4: Q8DQ (page 1072)
For a certain sinusoidal wave of intensity I, the amplitude of the magnetic field is B. What would be the amplitude (in terms of B) in a similar wave of twice the intensity?
The amplitude of a wave of twice the intensitywill increase by a factor of.
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A heart defibrillator is used to enable the heart to start beating if it has stopped. This is done by passing a large current ofthrough the body atfor a very short time, usuallyabout . (a) What power does the defibrillator deliver to the body, and (b) how much energy is transferred ?
A resistor with resistance is connected to a battery that has emf 12.0 V and internal resistance . For what two values of will the power dissipated in the resistor be 80.0 W ?
A 10.0cm long solenoid of diameter 0.400 cm is wound uniformly with 800 turns. A second coil with 50 turns is wound around the solenoid at its center. What is the mutual inductance of the combination of the two coils?
A cylindrical rod has resistivity . If we triple its length and diameter, what is its resistivity in terms ofrole="math" localid="1655715631515" .
Electrons in an electric circuit pass through a resistor. The wire on either side of the resistor has the same diameter.(a) How does the drift speed of the electrons before entering the resistor compare to the speed after leaving the resistor? (b) How does the potential energy for an electron before entering the resistor compare to the potential energy after leaving the resistor? Explain your reasoning.
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