Electric field

The electric field inside a spherical shell of uniform surface charge density is

• Constant, less than zero

• Directly proportional to the distance from the centre

• zero

• None of the above

Tags

NGSS.HS-PS2-4

Electric lines of force about negative point charge are

• Circular, anticlockwise

• Circular, clockwise

• Radial, outward

• Radial, inward

Tags

NGSS.HS-PS2-4

Figure shows the electric lines of force emerging from a charged body. If the electric field at A and B are E_A and E_B respectively and if the displacement between A and B is r then

• E_A > E_B

• E_{A <} E_B

• E_{A =} E_{B / r}

• E_{A =} E_{B / r}²

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

 ABC is an equilateral triangle. Charges +q are placed at each corner. The electric intensity at O will be

•  $\frac{1}{4\pi\in_0}\left(\frac{q}{r^2}\right)$  

•  $\frac{1}{4\pi\in_0}\left(\frac{q}{r^{ }}\right)$  

•  $\frac{1}{4\pi\in_0}\left(\frac{3q}{r^2}\right)$  

• zero

Tags

NGSS.HS-PS2-4

An electron and a proton are in a uniform electric field, the ratio of their accelerations will be

• Zero

• Unity

• The ratio of the masses of proton and electron

• The ratio of the masses of electron and proton

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

The distance between the two charges 25 $\mu$ C and 36 $\mu$ C is 11 cm At what point on the line joining the two, the intensity will be zero 

• At a distance of 5cm from 25 $\mu$ C

• At a distance of 5cm from 36 $\mu$ C

• At a distance of 10cm from 25 $\mu$ C

• At a distance of 11 cm from 36 $\mu$ C

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

A charge particle is free to move in an electric field. It will travel

• Always along a line of force

• Along a line of force, if its initial velocity is zero

• Along a line of force, if it has some initial velocity in the direction of an acute angle with the line of force

• None of the above

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Conduction electrons are almost uniformly distributed within a conducting plate. When placed in an electrostatic field , the electric field 'E' within the plate

• Is zero

• Depends upon E

• Depends upon the atomic number of the conducting element

• Depends upon $\overrightarrow{E}$

Tags

NGSS.HS-PS2-4

The unit of electric field is not equivalent to

• N/C

• J/C

• V/m

• J/Coulomb.meter

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

There is a solid sphere of radius ‘R’ having uniformly distributed charge. What is the relation between electric field ‘E’ (inside the sphere) and radius of sphere ‘R’ is

•  $E\propto R^{-2}$  

•  $E\propto R^{-1}$  

•  $E\propto R^2$  

•  $E\propto\frac{1}{R^3}$  

Tags

NGSS.HS-PS2-4