Electrostatics Test

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Electrostatics Test - 3

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Question 1
1 / -0

Conductors are materials

A
that allow movement of protons

B
that allow movement of neutrons

C
that allow movement of electrons

D
that allow only random movement of electrons

Solution

Conductors are materials that permit electrons to flow freely from particle to particle. An object made of a conducting material will permit charge to be transferred across the entire surface of the object.
In conductors some electrons are unpaired so these electrons can move freely.
Question 2
1 / -0

A glass slab is held within the plates of a charged parallel plate condenser. Which of the following quantities does not change?

A
Energy of the condenser

B
Capacity

C
Intensity of electric field

D
Charge
Question 3
1 / -0

Charge is quantized means

A
charge cannot take any arbitrary values, but only values that are integral multiples of the fundamental charge(charge of proton/electron)

B
charges can take on any continuous value

C
charges can take on any discontinuous value

D
charges can take on discrete values that are multiples of charge on neutron

Solution

Total charge transferred from one body to other can be calculated by the number of electrons it is known as quantisation of charge given by q=±ne, where n= number of electrons , which should be an integer.
Question 4
1 / -0

A parallel plate capacitor has a voltage of 5 V between the two plates separated by 4 microns (1 micron = 10^-6 m). What is the electric field between the capacitor plates?

A
1.02 × 10⁵ V/m

B
1.25 × 10⁶V/m

C
3.4 × 10⁴V/m

D
4.3 × 10⁴V/m
Question 5
1 / -0

Two positive charges

A
repel each other

B
always attract each other

C
attract each other

D
attract each other at times and repel at other times

Solution

Acc to coulomb's law unlike charges always attract each other while like charges always repel each other so between two positive charges repulsion is working.
Question 6
1 / -0

A capacitor of capacitance C is fully charged by a 200 V supply. It is then discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat 2.5 × 10² J kg^–1 K^–1 and of mass 0.1 kg. If the temperature of the block rises by 0.4 K, then what is the value of C?

A
500 μF

B
400 μF

C
300 μF

D
200 μF

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Electrostatics Test - 3

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Electrostatics Test - 3

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Question 1

that allow movement of protons

that allow movement of neutrons

that allow movement of electrons

that allow only random movement of electrons

Solution

Question 2

Energy of the condenser

Capacity

Intensity of electric field

Charge

Question 3

charge cannot take any arbitrary values, but only values that are integral multiples of the fundamental charge(charge of proton/electron)

charges can take on any continuous value

charges can take on any discontinuous value

charges can take on discrete values that are multiples of charge on neutron

Solution

Question 4

1.02 × 105 V/m

1.25 × 106 V/m

3.4 × 104 V/m

4.3 × 104 V/m

Question 5

repel each other

always attract each other

attract each other

attract each other at times and repel at other times

Solution

Question 6

500 μF

400 μF

300 μF

200 μF

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1.02 × 10⁵ V/m

1.25 × 10⁶V/m

3.4 × 10⁴V/m

4.3 × 10⁴V/m