When a 12-volt car battery is short circuited with a wire, the current drawn from the battery is 100 amperes. The resistance of the wire is
a. zero.
b. 0.12 ohms.
c. 100/12 = 8.33 ohms.
d. 1200 ohms.
e. none of the above.
b
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In a self-sustaining fusion reaction, such as occurs in the sun,
A) energy is destroyed. B) nuclear energy is created from other forms of energy. C) energy is created. D) thermal energy is converted to nuclear energy. E) nuclear energy is converted to other forms of energy.
A person is nearsighted with a far point of 75.0 cm. (a) What focal length contact lens is needed to give him normal vision? (b) What is the power of the corrective lens?
What will be an ideal response?
When the voltage across a nonohmic resistor is doubled, the current through it triples. What happens to the power delivered to this resistor?
a. This cannot be answered with the information given. b. The power decreases to 2/3 of the original amount. c. The power increases to 1.5 times the original amount. d. The power increases to 6 times the original amount.
Answer the following statement(s) true (T) or false (F)
1. The rod creates an electric field in that frame.
2. The rod creates a magnetic field in that frame.
3. The proton feels an electric force in that frame.
4. The proton feels a magnetic force in that frame. Now consider a frame moving along with the proton.
5. The rod creates an electric field in that frame