Electrostatics Test

Result

Electrostatics Test - 87

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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

In the following diagram, the charge and potential difference across 8 μF capacitance will be respectively

A
320 μC, 40 V

B
420 μC, 50 V

C
214 μC, 27 V

D
360 μC, 45 V

Solution
Question 3
4 / -1

A conducting sphere of radius R, and carrying a charge q is joined to a conducting sphere of radius 2R, and carrying a charge –2q. The charge flowing between them will be

A

B

C
q

D

Solution
Question 4
4 / -1

An arc of radius r carries charge. The linear density of charge is λ and the arc subtends a angle π /3at the centre. What is electric potential at the centre

A

B

C

D

Solution
Question 5
4 / -1

A neutral water molecule (H₂O) in it\'s vapor state has an electric dipole moment of magnitude 6.4 × 10^–30 C–m. How far apart are the molecules centres of positive and negative charge

A
4 m

B
4 mm

C
4µm

D
4 pm

Solution
Question 6
4 / -1

A charge Q is fixed at a distance d in front of an infinite metal plate. The lines of force are represented by

A

B

C

D
Question 7
4 / -1

In a parallel plate capacitor the separation between the plates is 3 mm with air between them. Now a 1 mm thick layer of a material of dielectric constant 2 is introduced between the plates due to which the capacity increases. In order to bring its capacity to the original value the separation between the plates must be made

A
1.5 mm

B
2.5 mm

C
3.5 mm

D
4.5 mm

Solution
Question 8
4 / -1

Find equivalent capacitance between A and B

A
6C

B
5C

C
3C

D
2C

Solution
Question 9
4 / -1

The radii of the inner and outer spheres of a condenser are 9 cm and 10 cm respectively. If the dielectric constant of the medium between the two spheres is 6 and charge on the inner sphere is 18 ×10^–9 coulomb, then the potential of inner sphere will be, if the outer sphere is earthed

A
180 volts

B
30 volts

C
18 volts

D
90 volts

Solution
Question 10
4 / -1

In the following figure, the charge on each condenser in the steady state will be

A
3 μC

B
6μC

C
9μC

D
12μC

Solution