1 |
Capacitor stores energy in the form of : |
Electric field
Both of these
Magnetic field
Gravitational field
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2 |
The law, governing the force between electric charges is known as: |
Ampere’s law
Ohm’s law
Coulomb’s law
Faraday’s law65y7uhnb
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3 |
Between the plates of a parallel plate condenser there is 1mm thick paper of dielectric constant 4. Itis
charged at 100 volt. The electric field in volt/meter between the plates of the capacitor is: |
100
25000
100000
400000
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4 |
The coulomb’s law is valid for the charges which are: |
Moving and point charges
Stationary and point charges
Moving and non-point charges
Stationary and large size charges
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5 |
The distance between the plates of a charged parallel plate capacitor is 4mm and potential
difference is 6 volts. If the distance between the plates is increased to 12mm, then : |
The potential difference of the capacitor will become 18 volts
The P.D become 20 volts
The P.D will remain unchanged
The charge on condenser will reduce to one third
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6 |
The electron is a cathode-ray tube are accelerated from cathode to anode by a potential differenceof
2000 V. If this p.d is increased to 8000 V, the electrons will arrive at the anode with: |
Twice the kinetic energy and four times the velocity
Four times the kinetic energy and twice the velocity
Four times the kinetic energy and sixteen times the velocity
Sixteen times the kinetic energy and four times the velocity
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