An LR circuit contains an ideal 60-V battery, a 51-H inductor having no resistance, a 21-? resistor, and a switch S, all in series. Initially, the switch is open and has been open for a very long time. At time t = 0 s, the switch is suddenly closed
When the voltage across the resistor is equal to the voltage across the inductor, what is the current in the circuit?
A) 0.86 A B) 1.7 A C) 1.1 A D) 0.57 A E) 1.4 A
E
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Meters: A galvanometer with a coil resistance of 80 ? deflects full-scale for a current of 2.0 mA. What series resistance is required to convert it to a voltmeter reading full scale for 200 V.
A. 100 m? B. 0.80 m? C. 13 M? D. 250 k? E. 100 k?
The number 0.00325 × 10-8 cm can be expressed in millimeters as
A) 3.25 × 10-12 mm. B) 3.25 × 10-11 mm. C) 3.25 × 10-10 mm. D) 3.25 × 10-9 mm.
A Frenkel defect in an ionic material is a cation _____________and vacancy.
Fill in the blank(s) with the appropriate word(s).
The cause of Venus' slow rotation is unknown at present
Indicate whether the statement is true or false