Free Printable GP12

1.

Which of the following types of charging would create an opposite charge, without contact, and is considered temporary since electrons do not transfer between objects?

a)

Induction

b)

Friction

c)

Conduction

d)

Grounding

2.

Two similar metal spheres are side by side. One has a charge of -6 x $10^{-9}$ C and the other is neutral. After contact and separation, what is the charge on the sphere that was initially neutral?

a)

-6 x $10^{-9}$

b)

-3 x $10^{-9}$

c)

+6 x $10^{-9}$

d)

+3 x $10^{-9}$

3.

You use a positively charged PVC pipe to charge an initially neutral metal sphere by conduction. During conduction the sphere becomes __________.

a)

negative

b)

positive

c)

neutral

d)

zero

4.

Two like charges (+) and (+) will _________.

a)

attract

b)

repel

c)

attract and repel

d)

either attract or repel

5.

Which is NOT true about electrostatic interactions?

a)

like charges repel

b)

unlike charges attract

c)

any charged object repel on a neutral object

d)

any charged object can attract a neutral object

6.

What is the unit of electric charge?

a)

Ohms

b)

Coulomb

c)

Newton

d)

N/ $m^2$

7.

The following are materials that does not allow current to pass through, EXCEPT:

a)

cloth

b)

steel

c)

glass

d)

rubber

8.

Charging of objects could happen through

i. friction ii. induction iii. Conduction

a)

i and ii only

b)

ii and iii only

c)

i and iii only

d)

i, ii, iii

9.

Which type of circuit use branches to allow current to pass through more than one path?

a)

series

b)

parallel

c)

open

d)

closed

10.

Who developed the Kirchhoff’s Rule?

a)

Guztav Kirchhoff

b)

Justav Kirchhoff

c)

Gustav Kirchhoff

d)

Juztav Kirchhoff

11.

When you bring a neutrally charged body A near a strongly negative body B, its positive charges will be drawn near B and the negative charges will be pushed to the other side. This resulting condition polarizes the body and forms a ________.

a)

bipole

b)

flux

c)

dipole

d)

field

12.

In using electric field lines, positive charges are drawn ______.

a)

outward

b)

inmost

c)

inward

d)

inside

13.

Which is the energy transferred to or from an object via the application of force along a displacement?

a)

Potential Energy

b)

Gravitational Energy

c)

Mechanical Energy

d)

Work

14.

What is the electric potential from a source charge of 5 nC if a test charge will be placed 10cm from it?

Formula: $V\ =\ \frac{k\left|Q\right|}{r}$

a)

449.5 V

b)

4.50 V

c)

4495 V

d)

44.95V

15.

A point charge has a charge of 8 µC. At what distance from the point charge is the electrical potential 6 V?

Formula: $r\ =\ \frac{k\left|Q\right|}{V}$

a)

11.99m

b)

11986.67 m

c)

1.20 x $10^{16}$ m

d)

1.20x $10^{19}$

16.

Which electric component impedes the continuous passage of electric current and stores it until it is discharged at a latter time?

a)

diode

b)

transistor

c)

capacitor

d)

resistor

17.

Which type of capacitor where its capacitance varies directly with its length?

a)

parallel plate

b)

cylindrical

c)

spherical

d)

triangular

18.

Which circuit have gap(s) where current cannot flow thus, electric current cannot be delivered to the load where it is needed?

a)

open circuit

b)

closed circuit

c)

electric circuit

d)

electric current

19.

What is the capacitance if the value of charge stored is 1.5 nC and the voltage supplied is 3 V?

Formula: $C\ =\ \frac{Q}{V}$

a)

0.5 F

b)

2 F

c)

2 x $10^9$ F

d)

500 x $10^{-12}$ F

20.

Which type of capacitor where its capacitance varies directly with its overall radius?

a)

parallel plate

b)

cylindrical

c)

spherical

d)

triangular

21.

Which diagrams used to make it easy to draw circuits?

a)

Fish bone

b)

Schematic

c)

Concept

d)

Structure

22.

What electrical component is shown in the picture?

a)

Power Pack

b)

Single Cell

c)

Battery

d)

Switch-Open

23.

What is the total capacitance (C_total)?

a)

1.55nF

b)

1.55pF

c)

1.55µF

d)

1.55mF

24.

What is the total voltage?

a)

500 V

b)

1000 V

c)

1500 V

d)

750 V

25.

If the total capacitance is 2pF and the total voltage is 200V, what is the total charge?

Formula: $Q\ =\ CV$

a)

400nC

b)

400µC

c)

400mC

d)

400pC

26.

The following are the factors that affect the resistance of a conductor, EXCEPT:

a)

The resistivity of the material

b)

The total length of the conductor

c)

The cross-sectional area of the inductor

d)

The temperature of the conductor

27.

Calculate the time needed to produce a charge of 100 C and 20A.

Formula: $t\ =\ \frac{Q}{I}$

a)

5 mins

b)

5 hrs

c)

5 seconds

d)

5

28.

Which are units of Current (I)?

i. Ampere (A) ii. Coulomb per second (C/s) iii. Ohm-meter

a)

i and ii

b)

i and iii

c)

i only

d)

i, ii, iii

29.

Which is an intrinsic property of material that describes how it resists the electric current flowing through it?

a)

electrical resistivity

b)

electrical conductivity

c)

electrical capacitance

d)

electrical current

30.

What is the unit of Electromotive Force (EMF)?

a)

Newton

b)

Volts

c)

S/m

d)

Ω-m

31.

Which Kirchhoff’s rule is expressed as the sum of current which is equal to zero?

a)

Junction Rule

b)

Point Rule

c)

Loop Rule

d)

Both A and B

32.

Which Kirchhoff’s rule states that as a charge goes around the loop and returns to its starting point, the sum of the changes of its potential energy is equal to zero?

a)

Point Rule

b)

Loop Rule

c)

Junction Rule

d)

Kirchhoff’s 1^st Law

33.

A conductor has an area of 5mm². How many meters of this material are needed to yield a resistance of 1Ω? The resistivity of the conductor is 2.65 x $10^{-8}$ Ω-m.

Formula: $L\ =\ \frac{RA}{ρ}$

a)

188679.25 m

b)

1886792.45 m

c)

18867924.53 m

d)

188679245.28 m

34.

A 20meter length of cable has a cross-sectional area of and a resistance of 50 $m^2$ and a resistance of 5ohms. Calculate the conductivity of the cable.

Formula: $σ\ =\ \frac{L}{RA}$

a)

0.0016 S/m

b)

0.08 S/m

c)

0.5 S/m

d)

2 S/m

35.

Which is the “push” given to the electric charges for them to flow from the source to the components of the circuit?

a)

Potential Energy

b)

Gravitational Force

c)

Electromotive Force

d)

Kinetic Energy

36.

Which electric component limits the flow of current passing through the circuit?

a)

diode

b)

transistor

c)

capacitor

d)

resistor

37.

In equation form, Ohm’s Law is stated as?

a)

$V\ =\ \frac{I}{R}$

b)

$V\ =\ \frac{I}{R}$

c)

V = IR

d)

$V\ =\ \frac{I}{Q}$

38.

Which device is used to measures electrical resistance?

a)

Voltmeter

b)

Ammeter

c)

electric meter

d)

Ohmmeter

39.

Who found lodestones that can attract pieces of iron?

a)

Ancient Greeks

b)

Native Americans

c)

Romans

d)

Persians

40.

How does magnetic poles interact with one another?

a)

Like poles and unlike poles repel each other

b)

Like poles repel and unlike ones attract each other

c)

Like poles and unlike poles attract each other

d)

Like poles attract each other and unlike ones repel

41.

Magnets can be demagnetized by the following, EXCEPT:

a)

pounding

b)

exposed to alternating current

c)

burning

d)

breaking into smaller pieces

42.

If you cut a magnet into pieces:

a)

each piece will have a north pole and a south pole

b)

some pieces will have a north pole only

c)

some pieces will have a south pole only

d)

some pieces will have two north poles

43.

A point charge Q₁ = 1 nC is at origin. How far should the second point charge of 10 nC be placed to have electric potential energy of 2 J?

Formula: $r\ =\ \frac{k\left|Q1Q2\right|}{U}$

a)

4.50 x $10^{-20}$ m

b)

4.50 x $10^{-8}$ m

c)

4.50 x $10^{-28}$ m

d)

4.50 x $10^{-2}$ m

44.

What is the electrostatic force of attraction between a -20 x $10^{-6}$ C charge and a 30 x $10^{-6}$ C charge if they are separated by a distance of 5 meters?

Formula: $F\ =\ \frac{k\left|Q1Q2\right|}{r^2}$

a)

-0.21N

b)

21.576 x $10^{-20}$ N

c)

0.21N

d)

-21.576 x $10^{-20}$ N

45.

Based on the figure, the assumed direction of loop is the same with the direction of current, what would be its voltage or potential?

a)

positive potential

b)

negative potential

c)

either positive or negative

d)

neither positive nor negative

46.

I₁ = 3mA, I₂= -5mA, I₄ = 6mA, I₅ = -2mA, what is the value of I₃?

a)

-6mA

b)

6mA

c)

2mA

d)

-2mA

47.

Using Kirchhoff’s Current Law, what is the total current in the circuit at point A?

a)

I₁ + I₂= I₃+ I₄

b)

I₁ + I₂+ I₃+ I₄

c)

I₁ - I₂+ I₃+ I₄= 0

d)

I₁ = I₂+ I₃+ I₄

48.

Using Kirchhoff’s Voltage Law, what is the equation to compute for the value of current, I at loop 1?

a)

15V – 1KΩI₁ - 2KΩ I₂ = 0

b)

15V + 1KΩI₁ + 2KΩ I₂ = 0

c)

-15V – 1KΩI₁ - 2KΩ I₂ = 0

d)

-15V + 1KΩI₁ + 2KΩ I₂ = 0

49.

What is the electric flux of E = 1000N/C where A = 20 $m^2$ and Ɵ = 30⁰?

Formula: $\phi\ =\ EA\cos\theta$

a)

346410.16 Nm²/C

b)

17320.51 Nm²/C

c)

1732.05 Nm²/C

d)

34641.16 Nm²/C

50.

Where will you expose a demagnetized magnet so that it can be magnetized again?

a)

another magnet with a strong magnetic field

b)

cold place

c)

alternating current

d)

heat

GP12

Total questions: 50

Worksheet time: 1hrs 5mins

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