Which force field can accelerate an electron, but never change its speed? electr

Question

Which force field can accelerate an electron, but never change its speed? electric field magnetic field both of these none of these Voltage can be induced in a wire by moving the wire near a magnet. moving a magnet near the wire. changing the current in a nearby wire. Choices A. B. and C are all true. None of the above choices are true. An electric motor is very similar to an electric generator. an automobile battery. a radio receiver. None of the above choices arc correct. Disregarding the effects of friction, a cyclist will coast farther when a lamp powered by a wheel generator is of low wattage of high wattage. burned out. none of these

Explanation / Answer

5. answer is electric field

electric field can acclerate an electron but not change its speed . to satisfying this condition the electron must move in a circular path with constant speed ,but as direction changes continuously so their is accleration present

6 . answer is D,

because voltage can be induced in the wire if lines of force or flux density of field through the close loop wire changes . and this can be done by any of the above option A, B and C

7. an electric motor is very similar to the electric generator . their working principle is similar and only different is their input and out put

Answer is A

9. Disregarding the effect of friction , a cyclist will coast further when a lamp is power by a wheel generator is of high wattage

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