Express (2.2 × 106 )-1/2 in scientific notation
A) 6.7 × 10-4
B) 1.5 × 103
C) 1.5 × 10-5
D) 1.5 × 104
A
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A solenoid of length 4.00 cm and cross-sectional area 2.00 cm2 has 80 turns. What is its self- inductance?
A. 160 
H
B. 120 H
C. 80.0 H
D. 40.0 H
E. 0.500 H
Nuclear and fossil fuel generating plants differ in their need for a
A) smoke-stack. B) condenser. C) boiler. D) cooling lake or tower. E) All of the above.
A 0.16 pF parallel-plate capacitor is charged to 10 V. Then the battery is disconnected from the capacitor. When 1.00 × 10^7 positive charges of magnitude |e| are now placed on the positive plate of the capacitor, the voltage between the plates changes by
a. ?5.0 V. b. ?1.1 V. c. 0 V. d. +1.1 V. e. +5.0 V.
The current through two identical light bulbs connected in series is 0.25 A. The voltage across both bulbs is 110 V. The resistance of a single light bulb is
A) 22 ohms. B) 44 ohms. C) 220 ohms. D) 440 ohms. E) none of the above