Free Printable Electric Potential Energy. Mass and Energy II

1.

What's the formula to get Mechanical Potential Energy (U)

a)

$U=\ mgr$

b)

$U=\frac{1}{2}mv^2$

c)

$U=\ Fd$

d)

$U=\ mgh$

2.

Why is the electric force considered as a conservative force?

a)

There's not heat loss

b)

Because work just depends on the initial and final position

c)

Because the answer is on your ❤

d)

In the system just exists energy

3.

When the value of the work is positive, the electric potential energy is:

a)

equal

b)

negative

c)

positive

d)

null

4.

When the value of the work is negative, the electric potential energy is:

a)

equal

b)

negative

c)

positive

d)

null

5.

Talking about charges. How the work is calculated?

a)

$W=kqr$

b)

$W=\frac{Kq_oQ}{r^2}$

c)

$W=Eq_od$

d)

$W=U\ne Ek$

6.

How the electric potential energy is calculated?

a)

$U=kqr$

b)

$U=\frac{Kq_oQ}{r}$

c)

$U=Eq_1q_2d$

d)

$W=U\ne Ek$

7.

The nano prefix (η) means you have to multiply the base 10 with a power of:

a)

- 6

b)

6

c)

9

d)

- 9

8.

The centi prefix (c) means you have to multiply the base 10 with a power of:

a)

- 2

b)

- 3

c)

- 6

d)

- 9

9.

To have an Electric Potential Energy situation is necessary to have the next conditions:

a)

A particle within an E receiving an electrostatic force

b)

Two charges working at a given distance

c)

A charge affected by an E

d)

Forgotten prefixes to develop exercises and getting ZERO

10.

Find the potential energy of a system of a charge of +7 μC found at 0.06m of another charge of 20 μC?

a)

350 J

b)

$2.1\cdot10^{-17}J$

c)

21 J

d)

$2,1\cdot10^{13}\ J$

11.

Find the potential energy of a system of a charge of +2 μC found at 0.08m of another charge of 3 mC?

a)

8437.5 J

b)

$84.37\cdot10^{-17}J$

c)

675 J

d)

$67.5\cdot10^{-2}\ J$

12.

Find the distance at which you need to place a charge -16 μC from a charge 10ηC such that the potential energy between them is equal to 900 kJ

a)

$1.6\ ηm$

b)

$4\cdot10^{-5}m$

c)

1.6 μm

d)

1600000 m

13.

Talking about electric potential energy, what's the most impossible value of U produced by a superhero?

a)

b)

c)

14.

Considering the formula for Electric Potential energy, what value replaces mass in the formula:

$Ep=mgh$

a)

r

b)

E

c)

q

15.

Considering the formula for Electric Potential energy, what value replaces gravity in the formula:

$U=mgh$

a)

r

b)

E

c)

q

Electric Potential Energy. Mass and Energy II

Total questions: 15

Worksheet time: 7mins

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