The thunderclouds are charged by friction between

  • clouds and air
  • layers of clouds
  • water molecules and air
  • layers of air

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

  • 10 mC
  • 5 mC
  • 4 mC
  • 15 mC

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

  • 150V
  • 100V
  • 300V
  • 400V

To distinguish between insulators and conductors, we can use

  • electroscope
  • telescope
  • endoscope
  • fiberscope

On a dry day if we walk in a carpeted room and then touch some conductor we will fell

  • heat
  • small electric shock
  • large electric shock
  • light

The ability of a capacitor to store charge is

  • capacitance
  • resistance
  • friction
  • coulomb's force

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

  • electric field intensity
  • electric force
  • electric field
  • coulomb's force

SI unit of capacitance is

  • newton
  • volt
  • ohm
  • faraday

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

  • electric path
  • electric shock
  • electric field industry
  • electric field

Paper capacitor and mica capacitor are the examples of

  • ceramic capacitors
  • fixed capacitors
  • parallel plate capacitors
  • electrolytic capacitors

The electrostatic force acting on two charges of 1C separated by 1m is about

  • 4×109
  • 6×109
  • 8×109
  • 9×109

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

  • 18 µF
  • 20 µF
  • 12 µF
  • 40 µF

One micro coulomb is equal to

  • 10-6
  • 10-8
  • 10-4
  • 10-9

To store a large amount of charge at relatively low voltage, we use

  • ceramic capacitors
  • fixed capacitors
  • parallel plate capacitors
  • electrolytic capacitors

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

  • 1/2 volt
  • 1 volt
  • 2 volt
  • 3 volt

If one negative particle is 1.6×10-19, then the charge of how many particles would be equal to 100µC?

  • 7.25×1014
  • 6.25×107
  • 6.25×1014
  • 8.35×1014

In coulomb's law, the force of attraction or repulsion between two charges is

  • inversely proportional to charges
  • directly proportional to product of charges
  • directly proportional to square of distance between them
  • Inversely proportional to distance between them

The ability of a capacitor to store charge is affected by

  • area of the plates
  • distance between the plates
  • type of insulators used
  • all of above

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

  • magnetic induction
  • electrostatic induction
  • chemical induction
  • capacity

The study of charges at rest is called

  • chemical electricity
  • heat electricity
  • static electricity
  • mechanical electricity

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

  • both positive and negative charges
  • negative charge
  • positive charge
  • no charge

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

  • 1012 NC-1
  • 1011 NC-1
  • 1015 NC-1
  • 108 NC-1

The lines of the electric field were introduced by

  • Newton
  • Michael Faraday
  • John burges
  • Henry Pascal

A charge in the electric field always

  • moves from lower potential to higher potential
  • moves from higher potential to lower potential
  • stay at higher potential
  • stay at lower potential

Due to electrostatic induction in aluminum rod due to charged plastic rod, the total charge on the aluminum rod is

  • zero
  • positive
  • negative
  • dual

A person standing inside "Faraday cage" is not affected by the electric field because

  • electric potential is positive
  • electric potential is negative
  • zero electric potential
  • electric field outside the cage cancels the field inside

Unlike charges always

  • cancel each other
  • repel each other
  • attract each other
  • none of above

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

  • 15 NC-1
  • 12 NC-1
  • 10 NC-1
  • 5 NC-1

Like charges always

  • repel each other
  • attract each other
  • cancel each other
  • none of above

In the combination of capacitors in series, the right plate of one capacitor is connected to the next capacitor's

  • middle plate
  • right plate
  • left plate
  • none of above
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