Electrostatics Test

Result

Electrostatics Test - 154

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Weekly Quiz Competition

Question 1
4 / -1

Two point charges of +16c and –9c are placed 8 cm apart in air. ............... distance of a point from –9c charge at which the resultant electric field is zero.

A
24 cm

B
9 cm

C
16 cm

D
35 cm

Solution
Question 2
4 / -1

A

B

C

D

Solution
Question 3
4 / -1

An inclined plane making an angle of 30^o with the horizontal is placed in an uniform electric field E = 100 Vm^–1 A particle of mass 1 kg and charge 0.01 c is allowed to slide down from rest from a height of 1m. If the coefficient of friction is 0.2 the time taken by the particle to reach the bottom is .......... sec.

A
2.337

B
4.337

C
5

D
1.337

Solution
Question 4
4 / -1

A
41.8^o

B
45^o

C
40.8^o

D
45.8^o

Solution
Question 5
4 / -1

A Semicircular rod is charged uniformly with a total charge Q coulomb. The electric field intensity at the centre of curvature is .......

A

B

C

D

Solution
Question 6
4 / -1

The electron is projected from a distance d and with initial velocity ν_o parallel to a uniformly charged flat conducting plate as shown in figure. It strikes the plate after travelling a distance l along the direction. The surface charge density of conducting plate is equal to

A

B

C

D

Solution
Question 7
4 / -1

Two point masses m each carrying charge –q and +q are attached to the ends of a massless rigid non-conducting rod of length l. The arrangement is placed in a uniform electric field E such that the rod makes a small angle 5^o with the field direction. The minimum time needed by the rod to align itself along the field is ........

A

B

C

D

Solution
Question 8
4 / -1

Two uniformely charged spherical conductors A and B having radius 1mm and 2mm are separated by a distance of 5 cm. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of the electric fields at the surfaces of spheres A and B is .........

A
4 : 1

B
1 : 2

C
2 : 1

D
1 : 4

Solution
Question 9
4 / -1

A

B

C

D
0

Solution
Question 10
4 / -1

Two point charges q₁ = 2 c and q₂ = 1 c are placed at distance b = 1cm and a = 2 cm from the origin on the y and x axes as shown in figure. The electric field vector at point P (a, b) will subtend an angle θ with the X – axis given by,

A

B

C

D

Solution