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3 years ago

Which of the following is a true statement?

Physics

2 answers:

vlada-n [284]3 years ago

8 0

I think C is the correct answer

Oksi-84 [34.3K]3 years ago

3 0

Answer:

C. How closely packed the electric field lines are indicates the strength of the electric field

Explanation:

Lets discuss ll statements

A. it takes two charges to create an electric field

This is incorrect statement as the field near any charge particle is known as electric field

B. Electric field lines cross if they are between two like charges

This is incorrect statement because Electric field lines never intersects with each other because at the point of intersection there exist two directions

C. How closely packed the electric field lines are indicates the strength of the electric field

This is correct statement because field lines density is proportional to the electric field intensity

D. electric field lines point toward positive charges

Incorrect statement because electric field lines start from positive charge and end at negative charge always

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solids, liquids, and gases are three forms of matter that:a. take up space. b. have mass. c. are made of atoms. d. all of the ab

LiRa [457]

Answer:

Explanation:

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3 years ago

A point charge q1 is held stationary at the origin. A second charge q2 is placed at point a, and the electric potential energy o

likoan [24]

Answer:

$U_{b}=+7.3*10^{-8}J$

Explanation:

Given data

Electric potential at point a is Ua=5.4×10⁻⁸J

q₂ moves to point b where a negative work done on it $W_{a-b}=-1.9*10^{-8}J$

Required

Electric potential energy Ub

Solution

When a particle moves from a point where the potential is Ua to a point where it is Ub the change in potential energy is equal to work done where the force exerted on the charge is conservative and work done is given by:

$W_{a-b}=U_{a}-U_{b}\\U_{b}=U_{a}-W_{a-b}$

Now substitute the given values

$U_{b}=5.4*10^{-8}J-(-1.9*10^{-8}J)\\U_{b}=+7.3*10^{-8}J$

3 0

4 years ago

A 5 μF capacitor is connected to a 12 V battery. The charge on each plate of the capacitor is:

ziro4ka [17]

1 farad = 1 coulomb/volt

5 μF = 5 x 10⁻⁶ coulomb/volt

= 60 x 10⁻⁶ coulomb / 12 volts

The charge is 60 x 10⁻⁶ coulombs = 6 x 10⁻⁵ (choice-A)

3 0

4 years ago

What is the sun's right ascension on the first day of winter?

Savatey [412]

From the point of view of the northern hemisphere:

The sun starts out the year at the Spring equinox, March 21,
Right Ascension 0, Declination 0.

3 months later, Summer solstice, June 21
RA = 6 hours, Dec. = +23.5°

3 months later, Fall equinox, September 21,
RA = 12 hours, Dec. = 0

3 months later, Winter solstice, December 21,
RA = 18 hours, Dec. = -23.5°

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3 years ago

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Following an inelastic collision, what can kinetic energy be converted into

kobusy [5.1K]

Vibrational energy, which as we know, causes heat!

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3 years ago

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