Electric Field Due to Disk and Infinitely Large Sheet

Q.

The magnitude of electric field due to an infinite uniformly charged insulating sheet is 10 N/C at a point which is at a distance 3m away from it. The surface charge density of the sheet will be?

1. $\sigma =5{\epsilon }_{0}C/m^2$

2. $\sigma =20{\epsilon }_{0}C/m^2$

3. $\sigma ={\epsilon }_{0}C/m^2$

4. None of these

Q. For the given electric field lines configurations, which of the following charge has greater magnitude?

1. $Q_1$
2. $Q_4$
3. $Q_2$
4. $Q_3$

Q.

The S.I. unit of surface charge density is……….

1. $Cc{m}^{-2}$

2. $A{m}^{-2}$

3. $Ac{m}^{-2}$

4. $C{m}^{-2}$

Q.
A neutral conducting rod is placed close to infinite charged plane then

1. Rod will be attracted towards plane.
2. Rod will be repulsed from plane
3. Net force on rod will be zero
4. Can't predict

Q. A large conducting plate is placed between 2 positive charges $Q_1$ and $Q_2$.

1. $Q_1$ will be attracted towards plate
2. $Q_1$ will be repelled away from plate
3. There will be no net force on $Q_1$
4. net force on $Q_1$ will be away from $Q_2$

Q. For the given electric field lines configurations, which of the following charge has greater magnitude?

1. $Q_4$
2. $Q_2$
3. $Q_3$
4. $Q_1$

Q. A proton is released from position near to positive plate. It reaches to opposite plate in time $t_1$, now one $\alpha$ particle is released & it reaches to opposite plate in time $t_2$, then $t_1:t_2$

1. $1:1$
2. $1:2$
3. $2:1$
4. $1:\sqrt{2}$