### questions

Title
###### The force between two charges is 120 N. If the distance between the charges is doubled,the force will be

The force between two charges is 120 N. If the distance between the charges is doubled,the force will be

1. 60 N
2. 30 N
3. 40 N
4. 15 N
###### The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. Ifthe distance is reduced to 2 metres, the field intensity will be

The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. Ifthe distance is reduced to 2 metres, the field intensity will be

1. 400 N/C
2. 600 N/C
3. 800 N/C
4. 1200 N/C
###### The lines of force due to charged particles are

The lines of force due to charged particles are

1. always straight
2. always curved
3. sometimes curved
4. none of the above
###### The electric field at a point situated at a distance d from straight charged conductor is

The electric field at a point situated at a distance d from straight charged conductor is

1. proportional to d
2. inversely proportional to d
3. inversely proportional to d
4. none of the above
###### The direction of electric field due +0 positive charge is

The direction of electric field due +0 positive charge is .

1. away from the charge
2. towards the charge
3. both (a) and (6)
4. none of the above
###### A field line and an equipotential surface are

A field line and an equipotential surface are

1. always parallel
2. always at 90°
3. inclined at any angle 0
4. none of the above
###### The ability of charged bodies to exert force on 6ne another is attributed to the existenceof

The ability of charged bodies to exert force on 6ne another is attributed to the existenceofa

1. electrons
2. protons
3. neutrons
4. electric field
###### If the sheet of a bakelite is inserted between the plates of an air capacitor, thecapacitance will

If the sheet of a bakelite is inserted between the plates of an air capacitor, thecapacitance will

1. decrease
2. increase
3. remains unchanged
4. become zero
###### A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is

A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is

1. 0.024 F
2. 0.12 F
3. 0.6 F
4. 0.8 F
###### For making a capacitor, it is better to select a dielectric having

For making a capacitor, it is better to select a dielectric having

1. low permittivity
2. high permittivity
3. permittivity same as that of air
4. permittivity slightly more than that of air
###### The units of capacitance are

The units of capacitance are

1. volts/coulomb
2. coulombs/volt
3. ohms
4. henry/Wb
###### If three 15 uF capacitors are connected in series, the net capacitance is

If three 15 uF capacitors are connected in series, the net capacitance is

1. 5 uF
2. 30 uF
3. 45 uF
4. 50 uF
###### If three 10 uF capacitors are connected in parallel, the net cararitance is

If three 10 uF capacitors are connected in parallel, the net cararitance is

1. 20 uF
2. 30 uE
3. 40 uF
4. 50 uF
###### A dielectric material must be

A dielectric material must be

1. resistor
2. insulator
3. good conductor
4. semi conductor
###### An electrolytic capacitor can be used for

An electrolytic capacitor can be used for

1. D.C. only
2. AC. only
3. both D.C. as well as A.C.
4. none
###### The capacitance of a capacitor is not affected by

The capacitance of a capacitor is not affected by

1. distance between plates
2. area of plates
3. thickness of plates
4. all of the above
###### Which of the following is not a vector ?

Which of the following is not a vector ?

1. Linear momentum
2. Angular momentum
3. Electric field
4. Electric potential
###### Two plates of a parallel plate capacitor after being charged from a constant voltagesource are separated apart by means of insulated handles, then the

Two plates of a parallel plate capacitor after being charged from a constant voltagesource are separated apart by means of insulated handles, then the

1. Voltage across the plates increases
2. voltage across the plates decreases
3. charge on the capacitor decreases
4. charge on the capacitor increases
###### If A.C. voltage is applied to capacitive circuit, the alternating current can flow in thecircuit because

If A.C. voltage is applied to capacitive circuit, the alternating current can flow in thecircuit because

1. varying voltage produces the charg¬ing and dicharging currents
2. of high peak value
3. charging current can flow
4. discharge current can flow
###### Voltage applied across a ceramic dielectric produces an electrolytic field 100 timesgreater than air. What will be the value of dielectric constant ?

Voltage applied across a ceramic dielectric produces an electrolytic field 100 timesgreater than air. What will be the value of dielectric constant ?

1. 50
2. 100
3. 150
4. 200

MCQs

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