10th Physics Chapter 4: Electrostatics

Sr #	Questions	A	B	C	D
1	What is the SI unit of capacitance?	Ohm	Volt	Farad	Ampere
2	An electrostatic precipitator is most commonly used to remove:	Water droplets from air	Dust particles from industrial exhaust gases	Metal ions from solutions	Static charges from materials
3	What is electric potential?	The electric charge stored in a capacitor	The electric energy stored in an electric field	The electric field intensity in a region	The electric potential energy per unit charge at a point in an electric field
4	Which instrument is used to detect the presence and magnitude of electric charge?	Voltmeter	Ammeter	Electroscope	Galvanometer
5	Lightning occurs due to the discharge of static electricity between:	Clouds and the ground	Metal objects and the ground	Positive and negative charges within a cloud	Lightning rods and buildings
6	If the distance between two charges is doubled, what happens to the electric force between them?	It becomes one-fourth	It becomes half	It remains the same	It doubles
7	What happens when two objects with like charges are brought close to each other?	They repel each other	They attract each other	They remain unaffected	They create a magnetic field
8	Which of the following is an application of electrostatics used for removing dust particles from industrial exhaust gases?	Electro painting	Electrostatic precipitator	Lightning rod	Electroscope
9	In a series combination of capacitors, the total capacitance is:	Equal to the sum of individual capacitances	Less than the capacitance of the smallest capacitor	Greater than the capacitance of the largest capacitor	Equal to the product of individual capacitances
10	What is the purpose of using capacitors in electronic circuits?	To store energy permanently	To regulate voltage levels	To convert AC to DC	To temporarily store and release electrical energy
11	What is the SI unit of electric field intensity?	Coulomb	Volt	Tesla	Newton per Coulomb
12	Which type of capacitor is commonly used in high-frequency applications such as radio frequency circuits?	Ceramic capacitor	Electrolytic capacitor	Tantalum capacitor	Variable capacitor
13	When capacitors are connected in parallel, the total capacitance is:	Equal to the sum of individual capacitances	Less than the capacitance of the smallest capacitor	Greater than the capacitance of the largest capacitor	Equal to the product of individual capacitances
14	What is a common problem associated with electrostatics in industries?	Decreased efficiency of electric motors	Corrosion of metal surfaces	Accidental fires or explosions	Reduced conductivity of materials
15	A cylindrical capacitor consists of two concentric cylinders. If the radius of the inner cylinder is doubled while keeping the radius of the outer cylinder constant, what happens to the capacitance?	It doubles	It halves	It quadruples	It remains the same
16	A capacitor stores electric charge by:	Converting charge into magnetic energy	Converting charge into gravitational energy	Creating an electric field between its plates	Converting charge into kinetic energy
17	Which of the following materials is commonly used as a dielectric in capacitors?	Aluminum	Copper	Glass	Plastic
18	The phenomenon of static electricity can sometimes lead to:	Increased conductivity of materials	Improved adhesion of surfaces	The formation of sparks causing fires or explosions	Reduction in friction between objects
19	What principle does an electrostatic precipitator rely on to remove dust particles?	Coulomb's law	Faraday's law	Ohm's law	Gauss's law
20	Coulomb’s law states that the force between two charges is:	Directly proportional to the product of their charges and inversely proportional to the square of the distance between them	Inversely proportional to the product of their charges and directly proportional to the square of the distance between them	Directly proportional to the product of their charges and directly proportional to the square of the distance between them	Inversely proportional to the product of their charges and inversely proportional to the square of the distance between them
21	Work done in moving a unit positive charge from one point to another in an electric field is defined as:	Electric field intensity	Electric resistance	Electric potential	Electric potential difference
22	What is the process by which a charged object induces a charge in a neutral object?	Electrostatic discharge	Electric polarization	Electrostatic induction	Electric field creation
23	What is the effect of adding a dielectric material between the plates of a capacitor?	Decreases the capacitance	Increases the capacitance	No effect on the capacitance	Changes the polarity of the capacitor
24	Which of the following particles carries a negative electric charge?	Proton	Neutron	Electron	Positron
25	Electro painting is a process used for:	Removing rust from metal surfaces	Applying a protective coating on surfaces using electric charges	Generating electricity from electrochemical reactions	Extracting dust particles from air
26	Electric field lines:	Start from positive charges and end at negative charges	Start from negative charges and end at positive charges	Start from negative charges and end at positive charges	Do not exist in a vacuum
27	A parallel plate capacitor has a capacitance of 10 microfarads. If the distance between the plates is doubled, what will be the new capacitance?	5 microfarads	10 microfarads	20 microfarads	40 microfarads
28	The spacing between electric field lines indicates:	The strength of the electric field	The number of charges	The type of charges	The magnitude of voltage
29	The SI unit of electric potential is:	Joule	Volt	Newton	Coulomb
30	The direction of the electric field intensity at a point due to a positive charge is:	Away from the charge	Toward the charge	Parallel to the charge	Perpendicular to the charge