Physics equations/19-Electric Potential and Electric Field/Q:KE&PE

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A

1 How fast is a 2642 eV electron moving?

	a) 3 x 107 m/s.
	b) 4.6 x 107 m/s.
	c) 6.9 x 107 m/s.
	d) 1 x 108 m/s.
	e) 1.5 x 108 m/s.

2 A proton is accelerated (at rest) from a plate held at 45.3 volts to a plate at zero volts. What is the final speed?

	a) 2.8 x 104 m/s.
	b) 4.1 x 104 m/s.
	c) 6.2 x 104 m/s.
	d) 9.3 x 104 m/s.
	e) 1.4 x 105 m/s.

3 What voltage is required accelerate an electron at rest to a speed of 9.4 x 10⁶ m/s?

	a) 7.4 x 101 volts
	b) 1.1 x 102 volts
	c) 1.7 x 102 volts
	d) 2.5 x 102 volts
	e) 3.8 x 102 volts

4 What voltage is required to stop a proton moving at a speed of 8.5 x 10⁴ m/s?

	a) 7.4 x 100 volts
	b) 1.1 x 101 volts
	c) 1.7 x 101 volts
	d) 2.5 x 101 volts
	e) 3.8 x 101 volts

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