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JEE Questions for Physics Electrostatics Ii Quiz 9 - MCQExams.com
JEE
Physics
Electrostatics Ii
Quiz 9
Assertion
: The coulomb force is the dominating force in the universe.
Reason
: The coulomb force is weaker than the gravitational force.
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If both assertion and reason are true but reason is not the correct explanation of the assertion
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If both assertion and reason are true but reason is not the correct explanation of the assertion.
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If assertion is true but reason is false.
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If the assertion and reason both are false.
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If assertion is false but reason is true
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If assertion is false but reason is true.
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If both assertion and reason are true but reason is not the correct explanation of the assertion.
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If both assertion and reason are true but reason is not the correct explanation of the assertion.
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If assertion is true but reason is false.
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If the assertion and reason both are false.
Assertion
: A metallic shield in form of a hollow shell may be built to block an electric field.
Reason
: In a hollow spherical shield, the electric field inside it is zero at every point.
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If assertion is true but reason is false.
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If the assertion and reason both are false.
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If assertion is false but reason is true.
Assertion
: Electrons move away from a low potential to high potential region.
Reason
: Because electrons have negative charge
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If assertion is true but reason is false.
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If the assertion and reason both are false.
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If assertion is false but reason is true
Assertion
: If the distance between parallel plates of a capacitor is halved and dielectric constant is made three times, then the capacitance becomes 6 times.
Reason
: Capacity of the capacitor does not depend upon the nature of the material.
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If the assertion and reason both are false.
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If assertion is false but reason is true
Assertion
: A parallel plate capacitor is connected across battery through a key. A dielectric slab of constant K is introduced between the plates. The energy which is stored becomes K times.
Reason
: The surface density of charge on the plate remains constant or unchanged.
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If both assertion and reason are true but reason is not the correct explanation of the assertion.
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If the assertion and reason both are false.
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If assertion is false but reason is true
Assertion
: Electric lines of force cross each other.
Reason
: Electric field at a point superimpose to give one resultant electric field.
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If both assertion and reason are true but reason is not the correct explanation of the assertion.
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If assertion is true but reason is false.
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If the assertion and reason both are false.
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If assertion is false but reason is true
Assertion
: If a proton and an electron are placed in the same uniform electric field. They experience different acceleration.
Reason
: Electric force on a test charge is independent of its mass.
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If assertion is true but reason is false.
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If the assertion and reason both are false.
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If assertion is false but reason is true
Assertion
: Dielectric breakdown occurs under the influence of an intense light beam.
Reason
: Electromagnetic radiations exert pressure.
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If the assertion and reason both are false.
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Assertion
: When charges are shared between any two bodies, no charge is really lost, but some loss of energy does occur.
Reason
: Some energy disappears in the form of heat, sparking etc.
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A simple pendulum has a length
l
and the mass of the bob is
m
. The bob is given a charge
q
coulomb. The pendulum is suspended between the vertical plates of a charged parallel plate capacitor. If
E
is the electric field strength between the plates, the time period of the pendulum is
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A fully charged capacitor has a capacitance
C
. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity
s
and mass
m
. If the temperature of the block is raised by ∆
T
, the potential difference
V
across the capacitance is
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Three capacitors C
1
, C
2
and C
3
are connected as shown in the figure to a battery of V volt. If the capacitor C
3
breaks down electrically, the change in total charge on the combination of capacitors is
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