Question # 1

The SI unit of current is

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watt

coulomb

volt

ampere

The concept of field theory was put forward by

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Franklin

Kepler

Oersted

Michael Faraday

In a charged capacitor the energy is stored in

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Both in positive and negative charges

Positive charges

The edges of the capacitor plates

The electric field between the plates

If electric and gravitational force on an electron in a uniform electric field will be

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E=mg/q

E=q/mg

E=,g/q

E=qg/m

The electric intensity outside the two oppositely charged parallel metal plates is

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Maximum

Minimum

Zero

Infinite

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

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3/5 ohm

2 ohm

6/5 ohm

3 ohm

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

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negative charges

positive charges

protons

electrons

If a 40 watt light bulb burns for 2 hours. how much heat is generated

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288 x 10³J

288 x 10⁸J

288 x 10⁵J

288 x 10⁶J

Physicist George Simon ohm was a

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German physical

French physicist

Chinese physicist

Russian physicist

One coulomb per second is equal to

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One volt

One ampere

One hom

One henry

Which one of the following has larger value of relative permitivity E_rat room temperature?

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Vaccum

Air

Glass

Water

The unit of intensity of electric field is

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newton/coluomb

jule/coluomb

volt x metre

newton/metre

The SI unit of electric flux is

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Weber

Nm²C^-1

NmC^-1

Nm^-2C

The liquid which conduct current is known as

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heating effect

chemical energy

electrolyte

ohm's law

Cause of heat production in a current carrying conductor is

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Collisions of free electrons with one another

High drift speed of free electrons

Collisions of free electrons with atoms or ions of conductor

High resistance value

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

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108 g

10.8 g

0.8 g

108/0.8 g

The resistivity of a substance depends upon the

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length

mass

area

temperature

The fractional change in resistance per kelvin is known as

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temperature coefficient

resistance coefficient

super temperature

critical temperature

Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be

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711μF

611μF

811μF

511μF

A conducting wire is drawn to double its length. Final resistivity of the material will be

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Double of the original one

Half of the original one

One fourth of the original one

Same as original one

The nature of capacity of electrostatic capacitor depends on

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Shape

Size

Thickness of plates

Area

The electric field will be uniform

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Near a positive point charge

Near a negative point charge

Between two oppositely charged parallel metal plates

None of above

The electrode connected with the positive terminal of the current source is called

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cathode

anode

electrolyte

position

The SI unit of electric field intensity is

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CN^-1

NC^-1or Vm^-1

JC^-1

AV^-1

Electric generators which convert mechanical energy into

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solar energy

thermal energy

kinetic energy

electrical energy

The energy stored in a charge capacitor

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1/2CV²

1/2C²V

1/2C/V²

None of these

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then

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R₁= 2R₂

R₂= 2R₁

R₂=4R₁

R₁= 4R₂

The capacity of a parallel plat capacitor depends on the

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Type to metal used

Thickness of plates

Potential applied across the plates

Separation between the plates

Surface density of charge is defined as

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Charge per unit volume

Charge per unit length

Charge per unit area

Charge per unit mass

If the distance of separation between two chares is increased, the electrical potential energy of the system will

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Increase

Decrease

May increase or decrease

Remain the same

Electric flux is defined by the relation

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E.A.

E x A

E/A

none of these

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