3 capacitors with capacitances 5µF, 6µF and 7µF are arranged in parallel combination with a battery of 5V, as 1µF = 10-6F, the voltage across each capacitor is

  • 15V
  • 5V
  • 18V
  • 20V

The charge on capacitor plates is directly proportional to

  • current
  • electric field intensity
  • potential difference
  • resistance

In equation Q=CV, C is the constant of proportionality called the capacitor's

  • power
  • capacitance
  • heat
  • electric intensity

Coulomb is equal to the charge of

  • 8.25×1018
  • 6.25×1018
  • 7.25×1018
  • 5.25×1018

A sensitive instrument for detecting charges is called

  • gold leaf electroscope
  • telescope
  • compound microscope
  • chemical electroscope

3 capacitors with capacitances 5µ F, 6µ F and 7µ F are arranged in series combination with a battery of 5V, as 1µ F = 10-6F, the quantity of charge on each plate of the capacitor is

  • 2.5µC
  • 1.96µC
  • 3.6µC
  • 2.89µC

Electroscope can be charged by

  • convection
  • radiation
  • conduction
  • all of above

The capacitor which has a dielectric between its plates and is made of a flexible material that can be rolled into the shape of a cylinder is called

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

To paint new cars automobile workers use

  • current electricity
  • static electricity
  • capacitor
  • inductor

Capacitor plates are separated by an insulator known as

  • non-metal
  • dielectric
  • paper
  • wood

The capacitors which use chemical reactions to store charge are called

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

A negative charge

  • repels neutral charge
  • attracts neutral charge
  • repels negative charge
  • repel positive charge

If the test charge is free to move, it will always move in the direction of

  • electric field intensity
  • electric field industry
  • electric field
  • electric shock

Plastic rod rubbed with fur and glass rod rubbed with silk

  • repel each other
  • mix up with each other
  • attract each other
  • none of above

Electric intensity being a force is a

  • unmeasurable quantity
  • vector quantity
  • scalar quantity
  • basic quantity

If the body is positively or negatively charged the leaves of electroscope will

  • diverge
  • converge
  • stay still
  • shrink

The amount of work done in bringing unit positive charge from infinity to a point in electric field is called

  • coulomb's force
  • electrostatic force
  • electric potential
  • resistance

As per Coulomb's law, the force of attraction or repulsion between two point charges is inversely proportional to the

  • sum of the magnitude of charges
  • square of the distance between them
  • product of the magnitude of charges
  • cube of the distance

The resonant circuits that tune radios to particular frequencies are called

  • plate circuits
  • radio circuits
  • filter circuits
  • fiber circuits

The property of material due to which it attracts or repels other objects is

  • friction
  • velocity
  • current
  • charge

In electrostatic air cleaner, air mixed with dust and pollen enters device across

  • positively charged mesh
  • negatively charged mesh
  • neutral mesh
  • dual charged mesh

If the medium between two charges is air, then the value of constant k in SI units will be

  • 5 × 109 Nm²C-2
  • 7 × 109 Nm²C-2
  • 8 × 109 Nm²C-2
  • 9 × 109 Nm²C-2

1 micro farad (1µF) is equal to

  • 1×10-9F
  • 1×10-12F
  • 1×10-6F
  • 1×10-10F

In the combination of capacitors in series, the capacitors are connected

  • parallel
  • side by side
  • up and down
  • none of above

The coulomb's force between the 2 point charges 10µC and 5µC placed at a distance of 150cm is

  • 0.2 N
  • 0.5 N
  • 2 N
  • 10 N

If 5 J of work is required to shift 10 C charge from one place to another then the potential difference is

  • 0.5 V
  • 2 V
  • 5 V
  • 10 V

The value of k in coulomb's law depends upon

  • magnitude of charges
  • distance between charges
  • medium between two charges
  • all of above

A device which stores charge is called

  • Resistor
  • Inductor
  • capacitor
  • transistor

To relieve the discomfort of allergy sufferers in homes, we use

  • vacuum cleaner
  • electrostatic air cleaner
  • wind cleaner
  • none of above

Coulomb's law is only true for point charges whose sizes are

  • medium
  • very large
  • very small
  • large
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0