MCQS |

Question :- By using electroscope if the body is negatively charged then due to electrostatic induction then on the disk there will be appear

1. both positive and negative charges

2. negative charge

3. positive charge

4. no charge

Question :- If one unit of charge given to the plates of a capacitor produces a potential difference of 1 volt between the plates of the capacitor then its capacitance would be

1.both 1/2 farad

2.1 farad

3.2 farad

4.3 farad

Question :- In coulomb s law the force of attraction or repulsion between two charges is

1. inversely proportional to charges directly proportional to product of charges

2. directly proportional to square of distance between them

3. Inversely proportional to distance

4.between them

Question :- In the combination of parallel capacitors the left plate of each capacitor is connected to the battery s

1.no terminal

2.both negative and positive terminals

3.negative terminal

4.positive terminal

Question :- Like charges always

1. repel each other

2. attract each other

3. cancel each other

4. none of above

Question :- The charge stored on plates of capacitors is directly proportional to the

1. potential difference

2. electric field industry

3. electric field

4.electric field intensity

Question :- The electron in a hydrogen atom experiences an electric field from the atom s nucleus in the order of

1.1012 NC-1

2.1011 NC-1

3.1015 NC-1

4.108 NC-1

Question :- The lines of the electric field were introduced by

1. Newton

2. Michael Faraday

3. John burges

4. Henry Pascal

Question :- The SI unit of charge is

1. Newton

2. coulomb

3. Pascal

4. omega

Question :- The SI unit of electric potential is

1. volts

2.ohm

3. coulomb

4. newton

Question :- To distinguish between insulators and conductors we can use

1. electroscope

2. telescope

3. endoscope

4. fiberscope

Question :- 3 capacitors with capacitances 5�F 6�F and 7�F are arranged in parallel combination with a battery of 5V as 1�F = 10-6F the total capacitance should be

1. 18 �F

2. 20 �F

3. 12 �F

4. 40 �F

Question :- A capacitor holds 0.03 C of charge when fully charged by a 6V battery. To hold 2C of charge the voltage required would be

1. 150V

2. 100V

3. 300V

4. 400V

Question :- A charge in the electric field always

1.moves from lower potential to higher potential

2.moves from higher potential to lower potential

3.stay at higher potential

4.stay at lower potential

Question :- A charge in the electric field always

1. moves from lower potential to higher potential

2. moves from higher potential to lower potential

3. stay at higher potential

4. stay at lower potential

Question :- A fire or an explosion may occur due to excessive build-up of electric charges produced by

1.heat

2.friction

3.chemicals

4.work done

Question :- A glass rod rubbed with silk thread is dual charged

1. positively charged

2. negatively charged

3. not charged

4. dual charged

Question :- A person standing inside Faraday cage is not affected by the electric field because

1. electric potential is positive

2.electric potential is negative

3.zero electric potential

4. electric field outside the cage cancels the field inside

Question :- A region around a charge in which it exerts an electrostatic force on another

1.electroscope

2. electric field industry

3. electric shock

4. electric path

Question :- As per coulomb s law when the distance of separation increases the attraction of 2 positively charged objects

1.increases

2.decreases

3.remains unchanged

4.can not be determined

Question :- By rubbing a neutral body with another neutral body we can produce

1.heat

2.electric charge

3.light

4.atoms

Question :- By using electroscope if the body is negatively charged then due to electrostatic induction then on the disk there will be appear

1.both positive and negative charges

2.negative charge

3.positive charge

4.no charge

Question :- By using electroscope if the body is negatively charged then due to electrostatic induction then on the leaves there will be appear

1. both positive and negative charges

2. negative charge

3. positive charge

4.no charge

Question :- Capacitors which uses chemical reactions to store charge are

1. paper capacitors

2. electrolytic capacitor

3. parallel plate capacitor

4. mica capacitor

Question :- Due to electrostatic induction in aluminum rod due to charged plastic rod the total charge on the aluminum rod is

1. zero

2.positive

3.negative

4. dual

Question :- he spacing between field lines shows their

1. direction

2. position

3. strength

4. none of above

Question :- If 1 joule of work is done against the electric field in bringing 1C positive charge from infinity to a point in the electric field then the potential at that point will be

1.1/2 volt

2.1 volt

3.2 volt

4.3 volt

Question :- If a charge is moved from lower power potential to higher potential then energy should be

1. released

2. remains same

3.supplied

4.converted

Question :- If mica and woolen cloth are rubbed together then mica gets

1. positively charged

2. negatively charged

3. remains neutral

4. dual charged

Question :- If q1 and q2 are the magnitudes of two charges r is the distance between the two charges k is the constant of proportionality then coulomb s force F between the two charges is equal to

1.k(q1q2)/r&sub2;

2.k(q1q2)/r

3.k(q1q2) + r&sub2;

4.k(q1q2) + r

Question :- If we bring charged plastic rod near-neutral aluminum rod then rods will

1. repel each other

2. attract each other

3. remain their position

4. exchange charges

Question :- In the combination of capacitors in series the right plate of one capacitor is connected to the next capacitor s

1. middle plate

2. right plate

3. left plate

4. none of above

Question :- In the combination of parallel capacitors the right plate of each capacitor is connected to the battery s

1. no terminal

2. both negative and positive terminals

3. negative terminal

4. positive terminal

Question :- In the presence of a charged body an insulated conductor develops a positive charge at one end and a negative charge at another end. This process is called capacity

1. magnetic induction

2. electrostatic induction

3. chemical induction

4.capacity

Question :- On a dry day if we walk in a carpeted room and then touch some conductor we

1. heat

2. small electric shock

3. large electric shock

4.electrolytic capacitors

Question :- One micro coulomb is equal to

1. 10-6

2. 10-8

3. 10-4

4.9-Oct

Question :- Paper capacitor and mica capacitor are the examples of

1. ceramic capacitors

2. fixed capacitors

3. parallel plate capacitors

4. electrolytic capacitors

Question :- SI unit of capacitance is

1. newton

2. volt

3. ohm

4. faraday

Question :- The ability of a capacitor to store charge is

1. capacitance

2. resistance

3. friction

4. coulomb s force

Question :- The ability of a capacitor to store charge is affected by

1. area of the plates

2. distance between the plates

3. type of insulators used

4. all of above

Question :- The basic property of material body due to which it attracts or repels another object is called

1.induction

2.repulsion

3.capacity

4.charge

Question :- The capacitance of a capacitor is 100? F and the potential difference between plates is 50 volts then charge stored on each plate is

1. 10 mC

2. 5 mC

3. 4 mC

4. 15 mC

Question :- The direction of free test charge will be the direction of

1. electric intensity

2.coulomb s force

3.magnetic intensity

4. protons

Question :- The divergence of leaves depends upon the

1. current

2. the amount of charge

3. nature of leaves

4. nature of disc

Question :- The electric charge between two bodies can be produced by

1. sticking

2.rubbing

3. oiling

4. passing AC current

Question :- The electric field 30cm away from a light bulb is roughly

1. 15 NC-1

2. 12 NC-1

3. 10 NC-1

4. 5 NC-1

Question :- The electron in a hydrogen atom experiences an electric field from the atom s nucleus in the order of

1. 1012 NC-1

2. 1011 NC-1

3. 1015 NC-1

4. 108 NC-1

Question :- The energy supplied by a unit charge as it moves from one point to the other in the direction of the field is called

1. potential difference

2. electric field industry

3. electric field

4. electric field intensity

Question :- The field lines always emerge from

1. negative charge

2. positive charge

3. the central point of both charges

4. all of above

Question :- The fundamental law of electric force between two stationary charged particles is established by

1.Newton

2.Ohm

3.Hooke

4.Coulomb

Question :- The lines of the electric field were introduced by

1.Newton

2.Michael Faraday

3.John burges

4.Henry Pascal

Question :- The major cause of fires and explosions in many places is

1.heat

2.thunderstorm

3.static electricity

4.automobiles

Question :- The region around a charge q in which it exerts a force on a test charge is called

1. electric field intensity

2. electric force

3.electric field

4. coulomb s force

Question :- The strength of an electric field at any point in space is known as

1. electric path

2. electric shock

3. electric field industry

4. electric field

Question :- The study of charges at rest is called

1. chemical electricity

2.heat electricity

3.static electricity

4.mechanical electricity

Question :- The study of charges at rest is called

1. chemical electricity

2. heat electricity

3. static electricity

4. mechanical electricity

Question :- The thunderclouds are charged by friction between

1. clouds and air

2. layers of clouds

3. water molecules and air

4. layers of air

Question :- To store a large amount of charge at relatively low voltage we use

1. fixed capacitors

2. fixed capacitors

3.parallel plate capacitors

4. electrolytic capacitors

Question :- To store the charge a device is used called

1. electric box

2. capacitor

3. plug

4. adopter

Question :- Unlike charges always

1.cancel each other

2.repel each other

3.attract each other

4.none of above

Question :- When a charge is released in an electric field it moves from a point of potential

1. in straight line

2. none of others

3. higher to lower

4. lower to higher