In a loop in a closed circuit, the sum of the currents entering a junction equals the sum of the currents leaving a junction because
A. the potential of the nearest battery is the potential at the junction.
B. there are no transformations of energy from one type to another in a circuit loop.
C. capacitors tend to maintain current through them at a constant value.
D. current is used up after it leaves a junction.
E. charge is neither created nor destroyed at a junction.
Answer: E
You might also like to view...
A spring-powered dart gun is un-stretched and has a spring constant 16.0 N/m. The spring is compressed by 8.0 cm and a 5.0 gram projectile is placed in the gun. The kinetic energy of the projectile when it is shot from the gun is
A. 0.125 J. B. 0.090 J. C. 0.075 J. D. 0.051 J. E. 0.030 J.
Suppose an object is suspended from strings as shown in the diagram below.
Which exerts the largest force on the connecting ring? A. String A B. String B C. String C
If Earth's axis were tilted at 40°, the seasons of the year would
a. be shorter. b. be harsher. c. be longer. d. not change. e. be milder.
A 274-N uniform ladder, 11.0 m long, rests against a smooth vertical wall. The coefficient of static friction between ladder and floor is 0.400 . What minimum angle can the ladder make with the floor before it slips?
a. 84.3° b. 68.2° c. 21.8° d. 51.3° e. 11.3°