physics conceptual

A soda bottle is next to pile of electrons. Electric flux through this object:

0

The total flux through any closed surface that does not contain a charge is:

0

If three identical lightbulbs are connected in series to a D-cell battery, then what is the voltage on each lightbulb? (1.5V)

0.5

If three identical lightbulbs are connected in parallel to a D-cell, then what is the voltage on each lightbulb? (1.5V)

1.5

The unit of flux is:

Vm

A concave mirror produces an enlarged real image when the object is placed just beyond its focal point

true

For light traveling from air to glass, the ray becomes bent toward the normal.

true

If the density of electric field lines near charge 1 is smaller than near charge 2, then the magnitude of charge 1 is smaller than charge 2.

true

If the electric field near a point charge points toward that charge, then the charge is negative.

true

If you connect two different capacitors in parallel in a circuit, then the voltage across each of them is different.

true

If you connect two different capacitors in series in a circuit, then the charge on each of them is different.

true

If you connect two different resistors in parallel in a circuit, then the voltage across each of them is the same.

true

Light travels at a faster speed in air than in glass.

true

The capacitance depends on the material between the plates

true

The electric flux of the E-Field is a scalar.

true

The focal length f is negative for convex mirrors.

true

The focal length f is positive for concave mirrors.

true

The magnification m is negative for inverted images.

true

Virtual images appear appear behind a mirror and have a negative value for the image distance.

true

___ appear on same side of the lens as the object and have a negative value for the image distance.

virtual images

A "connected" capacitor refers to capacitor that is connected to a battery and therefore has has a constant:

voltage

A neutral sphere and a positive sphere are oriented as show above. If the two spheres are then connected by a conducting wire what will be final charges of the spheres.

both spheres will carry a total charge of +2

The charge of a connected charged capacitor increases when the plates are:

brought closer together

A "disconnected" capacitor refers to capacitor that is no longer connected to a battery and therefore has has a constant:

charge

An electron and a proton separated by a distance d, are released from rest. Where do they collide?

closer to the proton start point

If the slit distance is increased, then the interference fringes move:

closer together

When a door feels cold on the inside because it is cold outside

conduction

When hot water circulates through a pot of water raising the temperature

convection

When the door is left open on a hot summer day and the house warms up due to air flow

convection

The resistance is inversely proportional to:

cross-sectional area A of the wire

The charge of a disconnected charged capacitor remains the same when the plate area is:

decreased

While maintaining a constant voltage V, the current I increases when the resistivity ρ of a wire:

decreases

If you connect two different capacitors in parallel in a circuit, then the charge on each of them is:

different

The electric flux is calculated as a:

dot product

The flux through a surface is proportional to the:

electric field

If an object is placed 7.9 cm from a converging lens with f = 4 cm, then its image will be:

enlarged and real

A concave mirror produces a(n) ___ ___ image when the object is placed just beyond its focal point.

enlarged real

While maintaining a constant voltage V, the current I increases when the cross-sectional area A of a wire:

expands

A concave mirror produces an enlarged real image when the object is placed far beyond its focal point.

false

A far-sighted person has trouble focusing on nearby objects and wears glasses with diverging lenses.

false

A near-sighted person has trouble focusing on distant objects and wears glasses with converging lenses.

false

A person with prescription of -3.1 diopters is far-sighted.

false

If an object is placed 4.1 cm from a concave mirror with f = 4 cm, then its image will be reduced and real.

false

If an object is placed 7.9 cm from a concave mirror with f = 4 cm, then its image will be reduced and real.

false

If the magnitude of charge 1 is larger than charge 2, then the density of electric field lines near charge 1 is smaller than near charge 2.

false

If you connect two different resistors in series in a circuit, then the voltage across each of them is the same.

false

The charge of a connected charged capacitor increases when the plate area is decreased.

false

The charge of a disconnected charged capacitor decreases when the plates are brought closer together.

false

The electric field is dependent on the distance between the plates.

false

The electric flux inside a charged conductor is non-zero.

false

The magnification m is negative for upright images.

false

The resistivity does not depend on the temperature of most metal wires.

false

The total electric flux for a closed surface containing two point charges with +Q and -3Q has a positive value.

false

The total electric flux through a closed surface depends on all charges within and outside the surface.

false

The total electric flux through a closed surface depends on charges outside the surface.

false

The voltage of a connected charged capacitor increases when the plates are brought closer together.

false

The voltage of a disconnected charged capacitor remains the same when the plate area is decreased.

false

Virtual images appear behind a mirror and have a positive value for the image distance.

false

When turning a surface inside of an electric field, the maximum flux is achieved if the electric field vector and the surface vector are perpendicular.

false

While maintaining a constant voltage V, the current I decreases when the resistivity ρ of a wire decreases.

false

While maintaining a constant voltage V, the current I increases when the cross-sectional area A of a wire contracts.

false

If the light wavelength becomes longer, then the interference fringes move:

further apart

For light traveling from ___ to ___ , the refraction angle is larger than the incidence angle.

glass to air

If θ1 < θ2, then ___ has a larger index of refraction.

material #1

If θ1 < θ2, then light travels slower in:

material #1

The capacitance is inversely proportional to the:

plate separation d

When a potential V is applied across a capacitor, a charge q is stored. What charge is stored if the potential across the capacitor is halved?

q/2

The total flux through a surface completely enclosing a charge q is:

q/E

When your skin is warmed while standing in direct sunshine

radiation

The resistivity ρ is proportional to the:

resistance R of a wire

While maintaining a constant voltage V, the current I decreases when the:

resistivity ρ of a wire increases

When the energy of the electrons increases, the interference fringes become:

spaced closer together

When the light become more blue, the interference fringes become:

spaced closer together

When the energy of the electrons decreases, the interference fringes become:

spaced further apart

If you connect two different capacitors in parallel in a circuit, then the voltage across each of them is :

the same

For light traveling from ___ to ___ , the incidence angle is larger than the refraction angle.

air to glass