physics MCQs - 10th class Chapter 04 Mcqs

1

The study of charges at rest is called?

A

Magnetism

B

Electrostatics

C

Current Electricity

D

Electromagnetism

2

When a plastic rod is rubbed with fur, what charge does it acquire?

A

Positive charge

B

Neutral charge

C

Negative charge

D

No charge

3

Repulsion is considered the sure test of charge on a body because?

A

Attraction can occur between a charged and an uncharged body

B

Repulsion only occurs between like charges

C

Attraction is weaker than repulsion

D

Both A and B

4

The process of charging a conductor by bringing a charged body near it without touching is called?

A

Friction

B

Conduction

C

Electrostatic induction

D

Polarization

5

A gold leaf electroscope is used for?

A

Measuring current

B

Detecting charge

C

Storing charge

D

Measuring potential difference

6

If you bring a negatively charged rod near the disk of a neutral electroscope, the leaves will?

A

Remain neutral

B

Diverge with positive charge

C

Diverge with negative charge

D

Collapse

7

The force between two point charges is directly proportional to the?

A

Distance between them

B

Square of the distance between them

C

Product of the charges

D

Sum of the charges

8

What is the value of Coulomb's constant 'k' in SI units when the medium is air?

A

9x10^9 N m^2 C^-2

B

6.67x10^-11 N m^2 kg^-2

C

9x10^-9 N m^2 C^-2

D

8.85x10^-12 C^2 N^-1 m^-2

9

Coulomb's law is applicable to?

A

Large sized charges

B

Moving charges

C

Point charges

D

Neutral bodies

10

The region around a charge where it exerts an electrostatic force on another charge is known as?

A

Gravitational field

B

Magnetic field

C

Electric field

D

Nuclear field

11

The SI unit of electric field intensity is?

A

N C

B

N/C

C

V/m

D

Both B and C

12

Electric field lines originate from?

A

Negative charges

B

Positive charges

C

The midpoint between charges

D

Infinity

13

Electric field lines for an isolated positive point charge are?

A

Directed inwards

B

Directed outwards

C

Circular

D

Parallel

14

Electric potential is defined as the work done in moving a unit positive charge from?

A

A point to another point

B

Infinity to that point

C

That point to infinity

D

A positive plate to a negative plate

15

The SI unit of electric potential is?

A

Joule

B

Coulomb

C

Ampere

D

Volt

16

One volt is equal to?

A

One Joule / One Coulomb

B

One Coulomb / One Joule

C

One Newton / One Coulomb

D

One Newton-meter / One second

17

A device used for storing electric charge is called a?

A

Resistor

B

Inductor

C

Capacitor

D

Transistor

18

The ability of a capacitor to store charge is called?

A

Resistance

B

Inductance

C

Capacitance

D

Conductance

19

The SI unit of capacitance is?

A

Volt

B

Coulomb

C

Farad

D

Ohm

20

One farad is equal to?

A

One Volt / One Coulomb

B

One Coulomb / One Volt

C

One Joule / One Volt

D

One Ampere / One Volt

21

When capacitors are connected in parallel, the total capacitance is?

A

The sum of individual capacitances

B

The reciprocal of the sum of reciprocals

C

Less than the smallest individual capacitance

D

The average of all capacitances

22

In a parallel combination of capacitors, which quantity remains the same across each capacitor?

A

Charge

B

Capacitance

C

Potential difference

D

Energy stored

23

When capacitors are connected in series, the equivalent capacitance is?

A

Greater than the largest individual capacitance

B

The sum of individual capacitances

C

Always 1 Farad

D

Less than the smallest individual capacitance

24

In a series combination of capacitors, which quantity is the same for each capacitor?

A

Potential difference

B

Charge

C

Capacitance

D

Energy

25

Which of the following is an example of a fixed capacitor?

A

Mica capacitor

B

Tuning capacitor in a radio

C

Variable air capacitor

D

All of the above

26

The dielectric in a paper capacitor is usually?

A

Mica sheet

B

Air

C

Oiled or greased paper

D

A vacuum

27

Which type of capacitor is used to store a large amount of charge at low voltages?

A

Paper capacitor

B

Mica capacitor

C

Variable capacitor

D

Electrolytic capacitor

28

In a variable capacitor, capacitance is changed by altering the?

A

Distance between plates

B

Dielectric material

C

Common area of the plates

D

Voltage applied

29

Electrostatic spray painting works on the principle of?

A

Like charges repel

B

Unlike charges attract

C

Magnetic fields

D

Conduction

30

In an electrostatic air cleaner, dust particles are precipitated on a?

A

Positively charged mesh

B

Negatively charged mesh

C

Neutral mesh

D

Heated filament

31

The phenomenon of lightning is caused by?

A

Friction between clouds and air molecules

B

Nuclear fusion in the atmosphere

C

Magnetic storms

D

The Earth's rotation

32

A lightning conductor is used to?

A

Attract lightning

B

Store the charge from lightning

C

Provide a safe path for discharge to the Earth

D

Repel lightning

33

Static electricity can be a fire hazard in areas with?

A

Water vapor

B

Oxygen

C

Petrol vapor

D

Nitrogen gas

34

During rubbing, the transfer of which particle causes objects to become charged?

A

Protons

B

Neutrons

C

Electrons

D

Ions

35

If two plastic rods rubbed with fur are brought near each other, they will?

A

Attract each other

B

Repel each other

C

Have no effect on each other

D

First attract, then repel

36

A glass rod rubbed with silk and a plastic rod rubbed with fur will?

A

Repel each other

B

Attract each other

C

Not interact

D

Both become neutral

37

The force between two charges is 16 N. If the distance between them is doubled, the force will be?

A

8 N

B

32 N

C

4 N

D

64 N

38

Which of the following materials is a good conductor?

A

Plastic

B

Wood

C

Copper

D

Rubber

39

If the leaves of a positively charged electroscope diverge more when a body is brought near its disk, the body is?

A

Negatively charged

B

Neutral

C

Positively charged

D

A conductor

40

If the leaves of a positively charged electroscope collapse when a body is brought near its disk, the body is?

A

Positively charged

B

Negatively charged

C

An insulator

D

Neutral

41

The formula for capacitance is?

A

C = V/Q

B

C = Q/V

C

C = QV

D

C = Q^2/V

42

One microfarad (µF) is equal to?

A

10^-3 F

B

10^-6 F

C

10^-9 F

D

10^-12 F

43

One picofarad (pF) is equal to?

A

10^-6 F

B

10^-9 F

C

10^-12 F

D

10^-15 F

44

Capacitors are used in the tuning circuits of radios to?

A

Amplify the signal

B

Create the sound

C

Filter frequencies

D

Power the device

45

In an electrolytic capacitor, the dielectric is a thin layer of?

A

Metal oxide

B

Paper

C

Mica

D

Polymer

46

The direction of the electric field is the same as the direction of the force on a?

A

Positive test charge

B

Negative test charge

C

Neutron

D

Electron

47

What happens to the force between two charges if the magnitude of one charge is doubled?

A

It is halved

B

It is doubled

C

It remains the same

D

It becomes four times

48

Which of these factors affects the ability of a capacitor to store charge?

A

Area of the plates

B

Distance between the plates

C

Type of insulator used

D

All of the above

49

Two 5µF capacitors are connected in series. Their equivalent capacitance is?

A

10 µF

B

2.5 µF

C

5 µF

D

0.4 µF

50

Two 5µF capacitors are connected in parallel. Their equivalent capacitance is?

A

10 µF

B

2.5 µF

C

5 µF

D

0.4 µF