# NCERT Class 12/MCQ Questions for Class 12 Physics Chapter 1 Electric Charges and Field Sample Test,Sample questions

## Question: `1 coulomb is equal to:`

1.3 Ã— 109 e.s.u.

2.13 Ã— 109 e.s.u

3.3 Ã— 1010 e.s.u

4.13 Ã— 1010 e.s.u.

Posted Date:-2021-12-15 13:01:37

## Question: `1 V equals to:`

1.1 J

2.1 JC-1

3.1 CJ-1

4.1 JC

Posted Date:-2021-12-15 15:29:35

## Question: `1 V m-1 equals to:`

1.1 N

2.1 Mm-1

3.1 NC-1

4.1 J-1

Posted Date:-2021-12-15 15:30:38

## Question: `A parrot comes and sits on a bare high power line. It will:`

1. experience a mild shock â€˜

2.experience a strong shock

3.get killed instantaneously

4.not be affected practically

Posted Date:-2021-12-15 14:36:10

## Question: `A soap bubble is given a negative charge, then its radius:`

1.increases

2.decreases

3.Remains unchanged

4.may increase or decrease

Posted Date:-2021-12-15 14:41:00

## Question: `A soap bubble is given a negative charge, then its radius:`

1.increases

2.decreases

3.Remains unchanged

4.may increase or decrease

Posted Date:-2021-12-15 14:41:13

## Question: `An electron is sent in an electric field of magnitude 9.1 Ã— 106NC-1. The acceleration produced in it is :`

1.1.6 ms-2

2.1.6 Ã— 1018ms-2

3.0.8 Ã— 1018 ms-2

4.0.8 Ã— 1018 ms-2

Posted Date:-2021-12-15 14:43:37

## Question: `Corona discharge takes place:`

1.at the surface of a conductor

2.near the sharp points of a conductor

3.outside the conductor

4.at the centre of the conductor

Posted Date:-2021-12-15 15:17:29

## Question: `Each of the two point charges are doubled and their distance is halved. Force of interaction becomes p times, w here p is :`

1.1

2.4

3.116

4.16

Posted Date:-2021-12-15 13:02:28

## Question: `Electric field in a cavity of metal:`

1.depends upon the surroundings

2.depends upon the size of cavity

3. is always zero

4.is not necessarily zero

Posted Date:-2021-12-15 12:59:58

## Question: `If an electric dipole is kept in a uniform electric field then resultant electric force on it is :`

1.always zero

2.never zero

3.depend upon capacity of dipole

4.None

Posted Date:-2021-12-15 12:56:15

## Question: `If sphere of bad conductor is given charge then it is distributed on:`

1.surface

2.inside the surface

3.only inside the surface

4.None

Posted Date:-2021-12-15 12:59:03

## Question: `If two conducting sphere are connected after charging separately then`

1.Electrostatic energy sphere energy will remain conserved

2.Electrostatic energy charges remains conserved

3.Electrostatic energy energy and charge remains conserved

4.None

Posted Date:-2021-12-15 14:39:53

## Question: `In non-uniform electric field, electric dipole experiences:`

1.torque only

2.torque as well as net force

3.force only

4.None of the above

Posted Date:-2021-12-15 14:42:03

## Question: ```oulombâ€™s law in vector form can be written as Fâƒ— = (14Ï€Îµn) (q1q2r2)râƒ— where Îµ0 is the permitivity of free space. The SI units of Îµ0 will be:```

1.N-1m-2C-2

2.Nm-2C2 (

3. N-1m-2C9

4.Nm-2C2

Posted Date:-2021-12-15 13:03:31

## Question: `Quantisation of charge implies:`

1.Charge does not exist

2.Charge exists on particles

3.There is a minimum permissible magnitude of charge

4.Charge canâ€™t be created

Posted Date:-2021-12-15 15:24:38

## Question: `The belt of a Vande Graaf generator gets charge by :`

1.corona discharge (b) (c)

2.induction

3.electrification

4.None of the these

Posted Date:-2021-12-15 15:23:14

## Question: `The conservation of electric charge implies that:`

1.Charge canâ€™t be created

2.Charge canâ€™t be destroyed

3.The number of charged particle in the universe is constant

4.Simultaneous creation of equal and opposite charges is permissible

Posted Date:-2021-12-15 15:26:01

## Question: `The dielectric constant of a metal is:`

1. 0

2.1

3.âˆž

4.-1

Posted Date:-2021-12-15 13:00:48

## Question: `The dimensional representation of cu will be :`

1.[MLT4 A2]

2.[M-1L-3T4A2]

3.[ML-2T ]

4.None of the above

Posted Date:-2021-12-15 14:34:37

## Question: `The graph drawn between V are r for a non-conducting charged solid sphere of radius R for r < R will be :`

1.straight line

2.parabola

3.hyperbola

4.None of the above

Posted Date:-2021-12-15 15:15:22

## Question: `The minimum amount of charge observed so far is:`

1.1 C

2.4.8 Ã— 1-13 C

3.1.6 Ã— 10-19 C

4.1.6 Ã— 1019 C

Posted Date:-2021-12-15 15:31:33

## Question: `The number of electron-taken out from a body to produce 1 coulomb of charge will be :`

1.6.25 Ã— 1018

2.625 Ã— 1018

3.6.023 Ã— 1023

4.None

Posted Date:-2021-12-15 12:57:03

## Question: `The number of electrons contained in one coulomb of charge is:`

1.6.25 Ã— 1018

2.6.25 Ã— 1017

3.6.25 Ã— 1019

4.1.6 Ã— 1019

Posted Date:-2021-12-15 15:27:21

## Question: `The SI units of electric dipole moment are:`

1.C

2. Cm-1

3.Cm

4.Nm-1

Posted Date:-2021-12-15 14:38:53

## Question: `The unit of intensity of electric field is :`

1.metre/volt

2.Joule/newton

3.Coulomb/newton

4.Newton/coulomb

Posted Date:-2021-12-15 15:28:29

## Question: `The unit of intensity of electric field is :`

1.metre/volt

2.Joule/newton

3.Coulomb/newton

4.Newton/coulomb

Posted Date:-2021-12-15 15:28:30

## Question: `The work done in rotating an electric dipole in an electric field:`

1.W = ME (1 â€“ cos Î¸)

2.W = ME tan Î¸

3.W = ME sec Î¸

4.None

Posted Date:-2021-12-15 12:57:54

## Question: `Three charges + 3q + q and Q are placed on a st. line with equal separation. In order to maket the net force on q to be zero, the value of Q will be :`

1.+3q

2. +2q

3.-3q

4.-4q

Posted Date:-2021-12-15 12:55:24

## Question: `Two point charges +8q and -2q are located at ,v = O and ,v = L respectively. The location of a point on the .v-axis at which the net electric field due to these two point charges b is zero :`

1.4L

2.8L

3.L/4

4.2L

Posted Date:-2021-12-15 14:45:25

## Question: `When placed in a uniform field, a dipole experiences:`

1.a net force

2.a torque

3.both a net force and torque

4.neither a net force nor a torque

Posted Date:-2021-12-15 14:35:19

## Question: `Which one of the following is the unit of electric field?`

1.Coulomb

2.Newton

3.Volt

4.N/C

Posted Date:-2021-12-15 12:54:02

## More MCQS

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