Chapter 4: Q3DQ (page 1012)
In Figure below, if coil is turned so that its axis is vertical,
does the mutual inductance increase or decrease? Explain.
Short Answer
Answer
The mutual inductance is decrease
Chapter 4: Q3DQ (page 1012)
In Figure below, if coil is turned so that its axis is vertical,
does the mutual inductance increase or decrease? Explain.
Answer
The mutual inductance is decrease
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Get started for freeIn the circuit shown in Fig. E25.30, the 16.0-V battery is removed and reinserted with the opposite polarity, so that its negative terminal is now next to point a. Find (a) the current in the circuit (magnitude anddirection); (b) the terminal voltage Vbaof the 16.0-V battery; (c) the potential difference Vacof point awith respect to point c. (d) Graph the potential rises and drops in this circuit (see Fig. 25.20).
High-voltage power supplies are sometimes designed intentionally to have rather large internal resistance as a safety precaution. Why is such a power supply with a large internal resistance safer than a supply with the same voltage but lower internal resistance?
In the circuit of Fig. E25.30, the 5.0 Ω resistor is removed and replaced by a resistor of unknown resistance R. When this is done, an ideal voltmeter connected across the points band creads 1.9 V. Find (a) the current in the circuit and (b) the resistance R. (c) Graph the potential rises and drops in this circuit (see Fig. 25.20).
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.
A cylindrical rod of diameter is connected to
a power supply that maintains a constant potential difference of across
its ends, while an ammeter measures the current through it. You observe that
at room temperature the ammeter reads while at it
reads . You can ignore any thermal expansion of the rod. Find (a) the
resistivity at and (b) the temperature coefficient of resistivity at for the material of the rod.
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