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26 Cards in this Set
- Front
- Back
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Of the folowing quantities, the one that is vector in character is electric
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field
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The magnitude of the electric field in the region between two parallel oppositely charged metal plates is
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uniform throughout the region
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From its definition, the unit of electric field E is the N/C. An equivalent unit of E is the
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V/m
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A system of two charges has a positive potential energy. This signifies that
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both charges are positive or both are negative
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An electron and a proton are accelerated through the same potential difference.
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The elctron has the greater speed
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The electron volt is a unit of
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energy
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The energy content of a charged capacitor resides in its
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electric field
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When a slab of insulating material is placed between the plates of a charged capacitor, the electric field there relative to what it was before is
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less
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The farad is not equivalent to which of the following combination of units?
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C*V^2
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The plate area of a parallel-plate capacitor of capacitance C is doubled and the distance between the platesis halved, so that the volume of the dielectric remains the same. The new capacitance of the capacitor is
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4C
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A parallel-plate capacitor with air between its plates is charged until a potential difference of V appears across it. Another capacitor, having hard rubber (dielectric constant = 3) between its plates but otherwise identical, is also charged to the same potential difference. If the energy of the first capacitor is W, that of the second is
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3W
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An electric field of magnitude 200V/m can be produced by applying a potential difference of 10 V to a pair of parallel metal plates separated by
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50 mm
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A charge of 10^-10 C between two parallel metal plates 1 cm apart experiences a force of 10^-5 N. The potential difference between the plates is
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10^3 V
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In charging a storage battery, a total of 2.0 x 10^5 C is transferred from one set of electrodes to another. The potential difference between the elctrodes is 12 V. The energy stored in the battery is
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2.4 x 10^6 J
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A storage battery is being charged at a rate of 100W at a potential difference of 13.6 V. The rate at which charge is being transferred between its plates is
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7.35 C/s
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An electron between two metal plates 40 mm apart experiences an acceleration of 1.0 x 10^12 m/s. The potential difference between the plates is
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0.23 V
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An electron whose speed is 1.0 x 10^7 m/s has a KE of
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0.28keV
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An electron whose KE is 150keV has a speed of
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7.3 x 10^6 m/s
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A capacitor acquires a charge of 0.002 C when connected across a 50-V battery. Its capacitance is
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40uF
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A 50-uF capacitor has a potential difference of 8V across it. Its charge is
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4 x 10^-4 C
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If a 20-uF capacitor is to have an energy content of 2.5 J, it must be placed across a potential difference of
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500 V
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A parallel-plate capacitor has a capacitance of 50pF in air and 110pF when immersed in turpentine. The dielectric constant of turpentine is
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2.2
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Two 50-uF capacitors are connected in series. The equivalent capacitance of the combination is
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25uF
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The capacitor combination in (Two 50-uF capacitors are connected in series. The equivalent capacitance of the combination is)(25uF) is connected across a 100-V battery. The potential difference across each capacitor is
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50 V
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Two 50-uF capacitors are connected in parallel. The equivalent capacitance of the combination is
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100uF
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100uF capacitance is connected across a 100-V battery. The potential difference across each capacitor is
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100 V
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