3rd quarter exam (Gen Physics II)

Question 1

refers to the flow of electric charge. It is a fundamental concept in understanding how electricity works.

Answer 1

CURRENT

Question 2

One basic characteristic of materials that measures how much they can obstruct the flow of electricity is called

Answer 2

RESISTIVITY

Question 3

is a force that opposes the flow of current.

Answer 3

Electrical resistance

Question 4

are used to express resistance values

Answer 4

Ohms (Ω)

Question 5

is the opposition that an electrical device has to the flow of electrical current.

Answer 5

Resistance

Question 6

is a measure of the opposition to current flow in an electrical circuit.

Answer 6

Resistance

Question 7

States that the current is directly proportional to the voltage and inversely proportional to its resistance.

Answer 7

OHM’S LAW

Question 8

The Ohm’s law was named after the German physicist

Answer 8

Georg Ohm

Question 9

The total amount of work done to force the current flow through an electric circuit

Answer 9

Energy

Question 10

How much energy generated or consumed instantaneously (at any insta) OR the rate of transferred energy per unit time

Answer 10

Power

Question 11

are objects that produce magnetic fields and attract metals like iron, nickel and cobalt.

Answer 11

Magnets

Question 12

is no longer familiar in the study of magnetism because practically all magnets nowadays are artificial.

Answer 12

the Iodestone or the natural magnet

Question 13

Common magnet

Answer 13

Horseshoe magnet

Question 14

Bar magnets has

Answer 14

north pole and south pole

Question 15

a bar magnet that always points north

Answer 15

compass

Question 16

like poles __ and opposite poles ___

Answer 16

repel and attract may

Question 17

iron, colbalt, and nickle can lead to

Answer 17

ferromagnetism

Question 18

the person that describes the magnetic field through magnetic lines of force

Answer 18

Michael Faraday (1820)

Question 19

the magnetic poles are about __ from the geographic poles

Answer 19

1500 km

Question 20

the magnetic poles arise due to the distribution of iron in ___

Answer 20

earth’s core

Question 21

Collision with atmospheric particles produce

Answer 21

Aurora borrealis (northern lights)

Question 22

the area around a magnet, magnetic object, or an electric charge in which magnetic force is exerted.

Answer 22

Magnetic Field

Question 23

Magnetic field affect the paths of

Answer 23

Charged particles

Question 24

technique used to show the direction of field

Answer 24

Right hand rule

Question 25

the force experienced by a charged particle moving through an electromagnetic field. This will cause the electron to experience a sideways force perpendicular to both its velocity and the magnetic field direction. This force will cause the electron to curve its path.

Answer 25

Lorentz force

Question 26

the Lorentz force law is after the Dutch physicist

Answer 26

Hendrik Antoon Lorentz

Question 26

the particle will experience a force in the direction of the field, regardless of the motion of the particle

Answer 26

electric field

Question 26

the particle will experience a force perpendicular to both the field direction and its direction of travel.

Answer 26

magnetic field

Question 26

The trajectory of a charged particle in an electric field will tend to be a straight line or a curve, while the general trajectory of a charged particle in a magnetic field will be a spiral.

Answer 26

true

Question 27

In Electric charge, protons give what kind of charges?

Answer 27

Positive Charge

Question 28

In Electric charge, Electrons give what kind of charges?

Answer 28

Negative Charge

Question 29

In Electric charge, Neutrons give what kind of charges?

Answer 29

Zero Charge

Question 30

What unit of measurement is given to the value of an electron/proton

Answer 30

Coulombs

Question 31

Electric charge has a constant as expressed in Coulombs, C.

Answer 31

Discrete Natural Units/ Coulombs

Question 32

It is an intrinsic property of property of particles that makes up all matter, charge can be positive and negative.

Answer 32

Electric Charge

Question 33

Is an equation that gives the magnitude and direction of the electrostatic force between two charged objects.

Answer 33

Coulombs Law

Question 34

In the coulombs law of equation, it refers to the straight-line distance between the two charges.

Answer 34

r

Question 35

Units for electrostatic force of each object

Answer 35

F

Question 36

Charges can be able to move freely.

Answer 36

Conductor

Question 37

Charges cannot be able to move freely.

Answer 37

Insulator

Question 38

Charging by rubbing different materials against each other.

Answer 38

Friction

Question 39

Charging of neutral object by contact with an already charged object.

Answer 39

Conduction

Question 40

Charging of neutral object without contact of other charged objects.

Answer 40

Induction

Question 41

A device used to store electric charge.

Answer 41

Capacitor

Question 42

The Dielectric Constant (K) of glass Pyrex is equivalent to?

Answer 42

5

Question 43

The Dielectric Constant (K) of Neoprene is equivalent to?

Answer 43

6.7

Question 44

The Dielectric Constant (K) of Paper is equivalent to?

Answer 44

3

Question 45

The Dielectric Constant (K) of Polyethylene is equivalent to?

Answer 45

2.5

Question 46

The Dielectric Constant (K) of Drywood is equivalent to?

Answer 46

2.9

Question 47

It is an electronic device used to store energy and create its own energy and power.

Answer 47

Capacitor

Question 48

What indicates negative terminal in a capacitor?

Answer 48

stripes

Question 49

Capacitors contain an insulating material made mostly of?

Answer 49

Aluminium

Question 50

It is the part responsible for non-touching of Electrodes.

Answer 50

Dielectric

Question 51

In dielectrics, molecules are neutral unless attached to charged terminals this process is called.

Answer 51

Polarization

Question 52

Biot-Savart Law was created by two french physicists

Answer 52

Jean Baptiste Biot and Felix Savart in 1820

Question 53

is an equation describing the magnetic field generated by a constant electric current.

Answer 53

Biot-Savart Law

Question 54

The magnitude of the magnetic field (dB) and the length of the element (dl) is directly proportional to the current (I). While, the square of the distance r is inversely proportional to it.

Answer 54

true

Question 55

is a useful law that relates the net magnetic field doing a closed loop to the electric field current passing through the loop.

Answer 55

Amphere’s law

Question 56

Amphere’s law is first discovered by

Answer 56

Andre-marie ampere in 1825.

Question 57

he realized that the equation provided by the ampere was incomplete, and extended his law by including that the magnetic field arises due to the electric current by giving a mathematical formulation.

Answer 57

James Clerk Maxwell

Question 58

All currents have to be steady and do not change with time. Only currents crossing the area inside the path are taken into account. Current have to be taken with their algebraic sign by using the Right Hand Rule.

Answer 58

true

Question 59

a device that is used to detect a small electric current or measure its magnitude.

Answer 59

Galvanometer

Question 60

(also known as a volt-ohm-milliammeter, volt-ohmmeter or VOM) is a measuring instrument that can measure multiple electrical properties.

Answer 60

Multimeter

Question 61

(abbreviation of Ampere meter) is an instrument used to measure the current in a circuit.

Answer 61

Ammeter

Question 62

instrument that measures voltages of either direct or alternating electric current on a scale usually graduated in volts, millivolts (0.001 volt), or kilovolts (1,000 volts).

Answer 62

Voltmeter