A Small Circular Ring of Wire Shown in Blue

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Q30.1 PowerPoint Presentation

Q30.1

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Q30.1

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1. Q30.1 A small, circular ring of wire is inside a larger loop that is connected to a battery and a switch S. The small ring and the larger loop both lie in the same plane. When the switch S is closed, 1. a clockwise current flows in the ring,caused by self-inductance 2. a counterclockwise current flows in the ring,caused by self-inductance 3. a clockwise current flows in the ring,caused by mutual inductance 4. a counterclockwise current flows in the ring,caused by mutual inductance

2. A30.1 A small, circular ring of wire is inside a larger loop that is connected to a battery and a switch S. The small ring and the larger loop both lie in the same plane. When the switch S is closed, 1. a clockwise current flows in the ring,caused by self-inductance 2. a counterclockwise current flows in the ring,caused by self-inductance 3. a clockwise current flows in the ring,caused by mutual inductance 4. a counterclockwise current flows in the ring,caused by mutual inductance

3. Q30.2 A current i flows through an inductor L in the direction from point a toward point b. There is zero resistance in the wires of the inductor. If the current is decreasing, 1. the potential increases from point a to point b 2. the potential drops from point a to point b 3. answer depends on the magnitude of di/dt compared to the magnitude of i 4. answer depends on the value of the inductance L 5. both 3. and 4. are correct

4. A30.2 A current i flows through an inductor L in the direction from point a toward point b. There is zero resistance in the wires of the inductor. If the current is decreasing, 1. the potential increases from point a to point b 2. the potential drops from point a to point b 3. answer depends on the magnitude of di/dt compared to the magnitude of i 4. answer depends on the value of the inductance L 5. both 3. and 4. are correct

5. Q30.3 A steady current flows through an inductor. If the current is doubled while the inductance remains constant, the amount of energy stored in the inductor 1. increases by a factor of 21/2 2. increases by a factor of 2 3. increases by a factor of 4 4. increases by a factor that depends on the geometry of the inductor 5. none of the above

6. A30.3 A steady current flows through an inductor. If the current is doubled while the inductance remains constant, the amount of energy stored in the inductor 1. increases by a factor of 21/2 2. increases by a factor of 2 3. increases by a factor of 4 4. increases by a factor that depends on the geometry of the inductor 5. none of the above

7. Q30.4 An inductor (inductance L) and a resistor (resistance R) are connected to a source of emf as shown. When switch S is closed, a current begins to flow and grows until it reaches a final value. The final value of the current 1. is directly proportional to both R and L 2. is directly proportional to R and inversely proportional to L 3. is inversely proportional to R and directly proportional to L 4. is inversely proportional to both R and L 5. is independent of L

8. A30.4 An inductor (inductance L) and a resistor (resistance R) are connected to a source of emf as shown. When switch S is closed, a current begins to flow and grows until it reaches a final value. The final value of the current 1. is directly proportional to both R and L 2. is directly proportional to R and inversely proportional to L 3. is inversely proportional to R and directly proportional to L 4. is inversely proportional to both R and L 5. is independent of L

9. Q30.5 An inductor (inductance L) and a resistor (resistance R) are connected to a source of emf as shown. When switch S is closed, a current begins to flow and grows until it reaches a final value. The time required for the current to reach half of its final value 1. is directly proportional to both R and L 2. is directly proportional to R and inversely proportional to L 3. is inversely proportional to R and directly proportional to L 4. is inversely proportional to both R and L 5. is independent of L

10. A30.5 An inductor (inductance L) and a resistor (resistance R) are connected to a source of emf as shown. When switch S is closed, a current begins to flow and grows until it reaches a final value. The time required for the current to reach half of its final value 1. is directly proportional to both R and L 2. is directly proportional to R and inversely proportional to L 3. is inversely proportional to R and directly proportional to L 4. is inversely proportional to both R and L 5. is independent of L

11. Q30.6 An inductor (inductance L) and a capacitor (capacitance C) are connected as shown. If the values of both L and C are doubled, what happens to the time required for the capacitor charge to oscillate through a complete cycle? 1. it becomes 4 times longer 2. is becomes twice as long 3. it is unchanged 4. it becomes 1/2 as long 5. it becomes 1/4 as long

12. A30.6 An inductor (inductance L) and a capacitor (capacitance C) are connected as shown. If the values of both L and C are doubled, what happens to the time required for the capacitor charge to oscillate through a complete cycle? 1. it becomes 4 times longer 2. is becomes twice as long 3. it is unchanged 4. it becomes 1/2 as long 5. it becomes 1/4 as long

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