Question

All of them

11) 11) The coil of a generator is rotated twice as fast keeping all other factors constant. What happens to the value of the maximum induced emf? A) It is increased by a factor of 4. B) It stays the same. C) It is reduced by a factor of 2 D) It is increased by a factor of 2 E) It is reduced by a factor of 4. 12) The primary codl of a transformer has 100 turms and its secondary coil has 400 turns. If the ac 12) voltage applied to the primary coil is 120 V, what voltage is present in its secondary coil? 13) A resistor, an uncharged capacitor, a de voltage source, and an open switch are all A) The potential difference across the resistor is always equal to the potential A) 400 V B) 30 V C) 480 V D) 70 V E) 100 V connected in series. The switch is closed at time t = 0 s, which one of the following is a correct statement about the circuit? difference across the capacitor. B) The capacitor charges to its maximum value in two time constants. C) Once the capacitor is essentially fully charged, there is no current in the circuit D) Current flows through the circuit even after the capacitor is essentially fully charged E) The capacitor charges to its maximum value in one time constant. 14) In the figure, a bar magnet moves away from the solenoid. The direction of the induced 14) current through the resistor R is A) from a to b B) from b to a No current is induced. 15) When different resistors are connected in parallel across an ideal battery, we can be 15) certain that A) the power dissipated in each is the same. B) their equivalent resistance is equal to the average of the individual resistances. C) the same current flows in each one. D) the potential difference across each is the same B) their equivalent resistance is greater than the resistance of any one of the individual resistances.

Answer 1

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