Review for 3Review for 3rdrd QuarterQuarter

Velocity is to speed as displacement is Velocity is to speed as displacement is to to

(A) acceleration (A) acceleration (B) momentum(B) momentum(C) time (C) time (D) distance(D) distance

The diagram shows a resultant vector, The diagram shows a resultant vector, R. Which diagram best represents a R. Which diagram best represents a pair of component vectors, A and B, that pair of component vectors, A and B, that would combine to form resultant vector R?would combine to form resultant vector R?

Which type of field is present near a moving Which type of field is present near a moving electric charge?electric charge?

(A) an electric field, only(A) an electric field, only(B) a magnetic field, only(B) a magnetic field, only(C) both an electric field and a magnetic field(C) both an electric field and a magnetic field(D) neither an electric field nor a magnetic (D) neither an electric field nor a magnetic

fieldfield

A negatively charged plastic comb is brought A negatively charged plastic comb is brought close to, but does not touch, a small piece of close to, but does not touch, a small piece of paper. If the comb and the paper are attracted paper. If the comb and the paper are attracted to each other, the charge on the paperto each other, the charge on the paper

(A) may be negative or neutral(A) may be negative or neutral(B) may be positive or neutral(B) may be positive or neutral(C) must be negative(C) must be negative(D) must be positive(D) must be positive

The current traveling from the cathode to the The current traveling from the cathode to the screen in a television picture tube isscreen in a television picture tube is5.0 × 105.0 × 10–5–5 ampere. How many electrons strike ampere. How many electrons strike the screen in 5.0 seconds? (1C = 6.2 E 18)the screen in 5.0 seconds? (1C = 6.2 E 18)

(A) 3.1 × 10(A) 3.1 × 1024 24

(B) 1.6 × 10(B) 1.6 × 101515

(C) 6.3 × 10(C) 6.3 × 1018 18

(D) 1.0 × 10(D) 1.0 × 1055

The diagram shows two identical metal spheres, A and B, separated by distance d. Each sphere has

mass m and possesses charge q.Which diagram best represents the electrostatic force Fe and the gravitational force Fg acting on sphere B

due to sphere A?

The electric circuit consists of a 12-volt The electric circuit consists of a 12-volt battery, a 3.0-ohm resistor, R1, and a variable battery, a 3.0-ohm resistor, R1, and a variable resistor, R2. At what value must the variable resistor, R2. At what value must the variable resistor be set to produce a current of 1.0 resistor be set to produce a current of 1.0 ampere through R1?ampere through R1?

(A) 6.0 Ω (A) 6.0 Ω (B) 3.0 Ω(B) 3.0 Ω(C) 9.0 Ω (C) 9.0 Ω (D) 12 Ω(D) 12 Ω

The diameter of a United States penny is The diameter of a United States penny is closest toclosest to

(A) 100 m (A) 100 m (B) 10(B) 10–2–2 m m(C) 10(C) 10–1–1 m m (D) 10(D) 10–3–3 m m

A 20-ohm resistor and a A 20-ohm resistor and a 30-ohm resistor are connected 30-ohm resistor are connected in parallel to a 12-volt battery as shown. An in parallel to a 12-volt battery as shown. An ammeter is connected as shown. What is the ammeter is connected as shown. What is the equivalent resistance of the circuit?equivalent resistance of the circuit?(A) 10. Ω (A) 10. Ω (B) 25 Ω(B) 25 Ω(C) 12 Ω (C) 12 Ω (D) 50. Ω(D) 50. Ω

A 20-ohm resistor and a A 20-ohm resistor and a 30-ohm resistor are connected 30-ohm resistor are connected in parallel to a 12-volt battery as shown. An in parallel to a 12-volt battery as shown. An ammeter is connected as shown. What is the ammeter is connected as shown. What is the current reading of the ammeter?current reading of the ammeter?(A) 1.0 A (A) 1.0 A (B) 0.40 A(B) 0.40 A(C) 0.60 A (C) 0.60 A (D) 0.20 A(D) 0.20 A

A 20-ohm resistor and a A 20-ohm resistor and a 30-ohm resistor are connected 30-ohm resistor are connected in parallel to a 12-volt battery as shown. An in parallel to a 12-volt battery as shown. An ammeter is connected as shown. What is the ammeter is connected as shown. What is the power of the 30.-ohm resistor?power of the 30.-ohm resistor?(A) 4.8 W (A) 4.8 W (B) 12 W(B) 12 W(C) 30 W(C) 30 W(D) 75 W(D) 75 W

Which graph best represents the relationship Which graph best represents the relationship between the magnitude of the electric field between the magnitude of the electric field strength, strength, E, E, around a point charge and the around a point charge and the distance, distance, rr, from the point charge?, from the point charge?

Several pieces of copper wire, all having the Several pieces of copper wire, all having the same length but different diameters, are kept at same length but different diameters, are kept at room temperature. Which graph best represents room temperature. Which graph best represents the resistance, the resistance, RR, of the wires as a function of , of the wires as a function of their cross-sectional areas, their cross-sectional areas, AA??

If the magnitude of the gravitational force of Earth on the Moon is F, the magnitude of the gravitational force of the Moon on Earth is

(A) smaller than F (B) larger than F (C) equal to F

An electroscope is a device with a metal knob, a metal stem, and freely hanging metal leaves used to detect charges. The leaf electroscope is positively charged. As a positively charged glass rod is brought near the knob of the electroscope, the separation of the electroscope leaves will

(A) decrease (B) increase (C) remain the same

In the circuit diagram, what are the correct readings of voltmeters V1 and V2?

(A) V1 reads 2.0 V and V2 reads 4.0 V (B) V1 reads 4.0 V and V2 reads 2.0 V (C) V1 reads 3.0 V and V2 reads 3.0 V (D) V1 reads 6.0 V and V2 reads 6.0 V

: F = : F = kkee q q11qq22 Gravity Force F == Gravity Force F == G mG m11mm22 1 C = 6.24 E18 1 C = 6.24 E18

dd22 d d22

  

kkee = 9E9 = 9E9 NmNm22 G = 6.67E-11G = 6.67E-11 Nm Nm22 1 amp = 1C/s 1 amp = 1C/s

CC22 kg kg22    

Electric Potential V = Joules/Coulomb Electric Field E = Electric Potential V = Joules/Coulomb Electric Field E = kkeeqq (N/C) (N/C)

dd22

ee-1-1 mass = 9.11E-31 kg mass = 9.11E-31 kg ee-1-1 charge = -1.60E-19 charge = -1.60E-19

Proton mass = +1.67E-27 kg Proton charge = 1.60E-19Proton mass = +1.67E-27 kg Proton charge = 1.60E-19

P = IVP = IV V = IRV = IR #turns (amperage) = #turns (amperage)#turns (amperage) = #turns (amperage)

1818

A point charge of +3.0 E-7 coulomb is placed A point charge of +3.0 E-7 coulomb is placed 2.0 E-2 meter from a second point charge of 2.0 E-2 meter from a second point charge of +4.0 E-7 coulomb. The magnitude of the +4.0 E-7 coulomb. The magnitude of the electrostatic force between the charges is electrostatic force between the charges is

A. 2.7 NA. 2.7 N

B. 5.4 E-2 NB. 5.4 E-2 N

C. 3.0 E-10 NC. 3.0 E-10 N

D. 6.0 E-12 ND. 6.0 E-12 N

1919

An apple weighing 1 Newton on An apple weighing 1 Newton on the surface of Earth has a mass of the surface of Earth has a mass of approximatelyapproximately

(A) 1×10(A) 1×10–1–1 kg kg(B) 1×10(B) 1×1011 kg kg (C) 1×10(C) 1×1000 kg kg(D) 1×10(D) 1×1022 kg kg

Which diagram best represents magnetic flux lines around a bar magnet?

What is the total resistance of the circuit segment?

(A) 1.0 (B) 9.0(C) 3.0 (D) 27

Which circuit diagram shows voltmeter V and ammeter A correctly positioned to measure the total potential difference of the circuit and the current through each resistor?

What is the total electrical energy used by a 1500-watt hair dryer operating for 6.0 minutes?

(1) 4.2 J (2) 250 J(3) 9.0×103 J (4) 5.4×105 J

Moving 2.5 × 10Moving 2.5 × 10–6 –6 coulomb of charge from coulomb of charge from point point A A to point to point B B in an electric field requires in an electric field requires 6.3 × 106.3 × 10–4–4 joule of work. The potential joule of work. The potential difference between points difference between points A A and and B B is is approximatelyapproximately(A) 1.6 × 10(A) 1.6 × 10–9–9VV(B) 4.0 × 10(B) 4.0 × 10–3–3V V (C) 2.5 × 10(C) 2.5 × 1022 V V(D) 1.0 × 10(D) 1.0 × 101414 V V

Three neutral metal spheres, Three neutral metal spheres, x, y, x, y, and and z, z, are in contact and on are in contact and on insulating stands. Which diagraminsulating stands. Which diagrambest represents the charge distribution on the best represents the charge distribution on the spheres when a positively charged rod is spheres when a positively charged rod is brought near sphere brought near sphere x, x, but does not touch it?but does not touch it?

A. B. C. D. A. B. C. D.

When a neutral metal sphere is charged When a neutral metal sphere is charged by contact with a positively charged by contact with a positively charged glass rod, the neutral sphereglass rod, the neutral sphere(A) loses electrons (A) loses electrons (B) loses protons(B) loses protons(C) gains electrons (C) gains electrons (D) gains protons(D) gains protons

2828

When a neutral metal sphere is charged When a neutral metal sphere is charged by induction with a positively charged by induction with a positively charged glass rod, the neutral sphereglass rod, the neutral sphere(A) loses electrons (A) loses electrons (B) loses protons(B) loses protons(C) gains electrons (C) gains electrons (D) gains protons(D) gains protons

30

If 10 coulombs of charge are transferred If 10 coulombs of charge are transferred through an electric circuit in 5.0 seconds, through an electric circuit in 5.0 seconds, then the current in the circuit isthen the current in the circuit is

(A) 0.50 A(A) 0.50 A(B) 2.0 A (B) 2.0 A (C) 15 A(C) 15 A(D) 50. A(D) 50. A

As the potential difference across a As the potential difference across a given resistor is increased, the power given resistor is increased, the power expended in moving charge through the expended in moving charge through the resistorresistor

(A) decreases(A) decreases(B) increases(B) increases(C) remains the same(C) remains the same

An electric iron operating at 120 volts An electric iron operating at 120 volts draws 10 amperes of current. How much draws 10 amperes of current. How much heat energy is delivered by the iron in 30 heat energy is delivered by the iron in 30 seconds?seconds?(A) 3.0 × 10(A) 3.0 × 1022 J J(B) 1.2 × 10(B) 1.2 × 1033 J J (C) 3.6 × 10(C) 3.6 × 1033 J J(D) 3.6 × 10(D) 3.6 × 1044 J J

One watt is equivalent to oneOne watt is equivalent to one

(A) N•m (A) N•m (B) J•s(B) J•s(C) N/m (C) N/m (D) J/s(D) J/s

The mass of a high school football player is approximately

(A) 100 kg (C) 102 kg(B) 101 kg (D) 103 kg

What is the reading on ammeter A?What is the reading on ammeter A?(A) 1.3 A (A) 1.3 A (C) 3.0 A(C) 3.0 A(B) 1.5 A (B) 1.5 A (D) 0.75 A(D) 0.75 A

In the diagram above, proton p, neutron n, and electron e are located as shown between two oppositely charged plates. The magnitude of acceleration will be greatest for the

(A) neutron, because it has the greatest mass (B) neutron, because it is neutral (C) electron, because it has the smallest mass (D) proton, because it is farthest from negative plate

Two protons are located one meter apart. Compared to the gravitational force of attraction between the two protons, the electrostatic force between the protons is

(A) stronger and repulsive (B) weaker and repulsive (C) stronger and attractive (D) weaker and attractive

The diagram shows a bar magnet. Which The diagram shows a bar magnet. Which arrow best represents the direction of the arrow best represents the direction of the needle of a compass placed at point needle of a compass placed at point AA??(A) ↑ (A) ↑ (C) →(C) →(B) ↓ (B) ↓ (D) ←(D) ←

The diagram represents the electric field surrounding two charged spheres, A and B. What is the sign of the charge of each sphere?

(A) Sphere A is positive and sphere B is negative.(B) Sphere A is negative and sphere B is positive.(C) Both spheres are positive.(D) Both spheres are negative.

What is a machine that produces electrical current by rotating a coil within a stationary magnetic field?

A. Generator B. TransformerC. Light bulb D. Motor

What is a machine that produces rotation of a coil within a stationary magnetic field by an electrical current?

A. Generator B. TransformerC. Light bulb D. Motor

According to Faraday’s law the induce voltage in a coil is ______ to the product of number of loopsA. Not relatedB. Inversely proportionalC. Proportional

For a transformer:The primary voltage is 6000 volts

and the primary amperage is 2 amps, the power is _____ watts.

For a transformer:If the primary voltage is 6000 volts

and the primary amperage is 2 amps, the power is _____ watts in the

secondary.

For a transformer:If the primary voltage is 6000 volts and the primary amperage is 2 amps with 50:1 ratio, what is the voltage in

the secondary?

For a transformer:If the primary voltage is 6000 volts and the primary amperage is 2 amps with 50:1 ratio, what is the amperage

in the secondary?

• For a transformer:For a transformer:

• The primary has a voltage of 6000 volts and The primary has a voltage of 6000 volts and amperage is 200 amps.amperage is 200 amps.

• What is the power in the primary?What is the power in the primary?

4848

• For a transformer:For a transformer:

• The primary has a voltage of 6000 volts and The primary has a voltage of 6000 volts and amperage is 200 amps.amperage is 200 amps.

• The secondary has a voltage of 480,000 volts and The secondary has a voltage of 480,000 volts and amperage is 1.5 amps.amperage is 1.5 amps.

• What is the power in the secondary?What is the power in the secondary?

4949

• For a transformer:For a transformer:

• The primary has a voltage of 6000 volts and The primary has a voltage of 6000 volts and amperage is 200 amps.amperage is 200 amps.

• The secondary has a voltage of 480,000 volts and The secondary has a voltage of 480,000 volts and amperage is 1.5 amps.amperage is 1.5 amps.

• What is the percent efficiency of the transformer?What is the percent efficiency of the transformer?

5050

What is a device used for changing the potential difference (voltage) of alternating currents?

A. An ammeter.B. A voltmeter. C. A direct current. D. A transformer. E. Not possible

What is a device used for changing the current (amperage) of alternating currents?

A. An ammeter.B. A voltmeter. C. A direct current. D. A transformer. E. Not possible

What is a device used for changing the power (watts) of alternating currents?

A. An ammeter.B. A voltmeter. C. A direct current. D. A transformer. E. Not possible