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Physics T/F FInal
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Terms in this set (37)
When a negatively charged particle moves from a region of a higher electrostatics potential Vi to a region of lower electrostatic potential Vf, its kinetic energy will increase.
False
When a charged particle moves under the influence of an arbitrary static (that is, time-independent) magnetic field, its kinetic energy will change.
False
Typical household electric outlets provide ~110 Volts A.C. This means that the maximum voltage output from the outlet is about 110Volts.
False
The amount of work done to move a positive point charge from the center of a charged solid conducting sphere to its surface is equal to zero.
True
There will be no change in the charge on the inner surface of a hollow conducting sphere if an additional charge is placed at the center of the sphere.
False
A steady magnetic flux through the circular conducting loop generates a vortex electric field in the loop.
False
In an inductor, a self-induced emf is at its maximum when the current is at its maximum.
False
In the R-C circuit (a resistor, capacitor and battery connected in series), a rate of capacitor charging is larger for larger resistance.
False
A resonance frequency in the L-R-C circuit is w0. An additional capacitor is connected in series to the capacitor in the circuit. The resonant frequency decreases.
False
The electric field vanishes (i.e. is equal to zero) anywhere inside a uniformly charged insulator.
False
A negatively charged particle released from rest will begin to move to a region of a higher electrostatic potential.
True
A spherical conducting ball of radius R carries a positive charge Q. It follows that the magnitude of the electric potential on the surface of the ball at r = R is the same as the magnitude of the electric potential at any point in the region r < R inside the ball.
True
A parallel-plate capacitor is connected to a battery. When a distance between the plates is decreased by a factor of 2, the amount of charge stored in the capacitor is decreased by the same factor.
False
An electric charge moves in the magnetic field. A Lorentz force always does work on the moving charge.
False
Two negative point charges are fixed at a certain distance r from each other. When both charges are released, they start moving away from each other with a continuously increasing acceleration.
False
Two negative point charges are fixed at a certain distance r from each other. When both charges are released, they start moving away from each other with a continuously increasing speed.
True
An infinitely long straight line of charge produces a uniform electric field.
False
An electric field is equal to zero anywhere inside a uniformly charged insulating sphere.
False
An electric field is equal to zero anywhere inside a charged conducting sphere.
True
Electrostatic forces have a limited range of action;
False
An electric field in the space between two parallel very large positively charged planes with equal surface charge density is zero.
True
When a negatively charged particle moves from a region of higher electrostatic potential Vi to a region of lower electrostatic potential Vf, its kinetic energy will increase.
False
A parallel-plate capacitor is connected to a battery. The amount of charge on the electrodes will stay the same irrespective of the distance between them.
False
Two parallel-plate capacitors with electrodes of the same area have the same amount of charge on them. A capacitor with the larger distance between the plates has the larger electric field in it.
False
Two identical bulbs connected in series to a battery will be dimmer than when they are connected to the same battery in parallel.
True
A slab of a dielectric is placed between the plates of the charged capacitor. As a result, the electric field between the plates increased.
False
When a charged particle moves in a uniform magnetic field, its kinetic energy does not change.
True
A 5-ohm resistor and a 10-ohm resistor are connected in series to a battery. In this configuration, the 10-ohm resistor dissipates more power than the 5-ohm resistor.
True
A 5-ohm resistor and a 10-ohm resistor are connected in parallel to a battery. In this configuration, the 10-ohm resistor dissipates more power than the 5-ohm resistor.
False
Two opposite point charges moving in parallel in the same direction with the same speed exert an attractive Lorentz force upon each other.
False
An infinitesimal current element located at the origin (x=y=z=0)carries current I in the positive y-direction. The strength of the magnetic field at the location (x=L; y=0; z=0) is larger than at the location (x=0; y=L; z=0).
True
An emf induced by a changing magnetic flux through a stationary conducting loop is due to the Lorentz force acting on the charge carriers in the loop.
False
Faraday's law relates an integrated magnetic field around a straight wire to the electric current passing through the wire.
False
In the R-C circuit (a resistor, capacitor and battery connected in series), the maximum charge stored in the capacitor is affected by the resistor.
False
A time-changing electric field generates a steady magnetic field.
False
An electron enters a space with a uniform magnetic field parallel to the field lines. It keeps moving along the same trajectory unperturbed.
True
In an inductor, a self-induced emf does not oppose the current itself but it does oppose any change in the current.
True
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