Two protons attract each other gravitationally and repel each other electrically. The stronger of these two forces is
A) gravitation.
B) electrical.
C) neither of these
Answer: B
You might also like to view...
Saturn's icy moon Enceladus
A) has an ancient, heavily cratered surface reminiscent of the Moon B) is small and irregular in shape like an asteroid C) has a smooth, icy surface criss-crossed with dark cracks D) has fountains of ice particles and water vapor spraying out from its surface
A blue camera filter appears blue because it transmits blue light, absorbing all other colors
Indicate whether the statement is true or false
A 10-A current flows through a wire for 2.0 min. (e = 1.60 × 10-19 C) (a) How much charge has passed through this wire? (b) How many electrons have passed any point in the wire?
What will be an ideal response?
A solenoid of length 18 cm consists of closely spaced coils of wire wrapped tightly around a wooden core. The magnetic field strength is 2.0 mT inside the solenoid near its center when a certain current flows through the coils
If the coils of the solenoid are now pulled apart slightly, stretching it to 21 cm without appreciably changing the size of the coils, what does the magnetic field become near the center of the solenoid when the same current flows through the coils? (?0 = 4? × 10-7 T • m/A) A) 1.7 mT B) 3.4 mT C) 0.85 mT D) 2.0 mT