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WorksheetsIB Physics Topic 5
Total questions: 24
Worksheet time: 48mins
Name
Class
Date
1.
The diagram shows a charged particle as it approaches a pair of charged parallel plates in a vacuum.
Which row describes the horizontal and vertical components of its motion as it travels between the plates?
Which row describes the horizontal and vertical components of its motion as it travels between the plates?
a)
A
b)
B
c)
C
d)
D
2.
A copper wire of cross-sectional area 2.0 mm2 carries a current of 10 A.
How many electrons pass through a given cross-section of the wire in one second?
How many electrons pass through a given cross-section of the wire in one second?
a)
1.0×101
b)
5.0×106
c)
6.3×1019
d)
3.1×1025
3.
A battery is marked 9.0 V.
What does this mean?
What does this mean?
a)
Each coulomb of charge from the battery supplies 9.0J of electrical energy to the whole circuit.
b)
The battery supplies 9.0 J to an external circuit for each coulomb of charge.
c)
The potential difference across any component connected to the battery will be 9.0 V.
d)
There will always be 9.0 V across the battery terminals.
4.
The resistance of a metal cube is measured by placing it between two parallel plates, as shown.
The cube has volume V and is made of a material with resistivity ρ. The connections to the cube have negligible resistance.
Which expression gives the electrical resistance of the metal cube between X and Y?
The cube has volume V and is made of a material with resistivity ρ. The connections to the cube have negligible resistance.
Which expression gives the electrical resistance of the metal cube between X and Y?
a)
A
b)
B
c)
C
d)
D
5.
The diagram shows part of a current-carrying circuit. The ammeter has negligible internal resistance.
What is the reading on the ammeter?
What is the reading on the ammeter?
a)
0.7 A
b)
1.3 A
c)
1.5 A
d)
1.7 A
6.
Four resistors of equal value are connected as shown.
How will the powers to the resistors change when resistor W is removed?
How will the powers to the resistors change when resistor W is removed?
a)
The powers to X, Y and Z will all increase.
b)
The power to X will decrease and the powers to Y and Z will increase.
c)
The power to X will increase and the powers to Y and Z will decrease.
d)
The power to X will increase and the powers to Y and Z will remain unaltered.
7.
In the circuit shown, XY is a length L of uniform resistance wire. R1 and R2 are unknown resistors. J is a sliding contact that joins the junction of R1 and R2 to points on XY through a small signal lamp S.
To determine the ratio V1/V2 of the potential differences across R1 and R2, a point is found on XY at which the lamp is off. This point is at a distance x from X. What is the value of the ratio V1/V2 ?
To determine the ratio V1/V2 of the potential differences across R1 and R2, a point is found on XY at which the lamp is off. This point is at a distance x from X. What is the value of the ratio V1/V2 ?
a)
A
b)
B
c)
C
d)
D
8.
Two positive point charges P and Q are held a certain distance apart.
At which point(s) could the electric field strength, due to the charges, be zero?
At which point(s) could the electric field strength, due to the charges, be zero?
a)
X only
b)
Y only
c)
Z only
d)
X and Z only
9.
The ampere is defined in terms of
a)
the force between a magnet and a coil carrying a current.
b)
the force between two long current carrying wires.
c)
the amount of charge that passes any cross-sectional area of a wire in unit time.
d)
the number of electrons that pass any cross-sectional area of a wire in unit time.
10.
Which one of the following shows a correct circuit, using ideal voltmeters and ammeters, for measuring the I-V characteristic of a filament lamp?
a)
A
b)
B
c)
C
d)
D
11.
Two 6Ω resistors are connected in series with a 6V cell. A student incorrectly connects an ammeter and a voltmeter as shown.
The readings on the ammeter and on the voltmeter are
The readings on the ammeter and on the voltmeter are
a)
A
b)
B
c)
C
d)
D
12.
Which diagram best represents the electric field due to a negatively charged conducting sphere?
a)
A
b)
B
c)
C
d)
D
13.
A current carrying wire is in the same plane as a uniform magnetic field. The angle between the wire and the magnetic field is θ .
The magnetic force on the current carrying wire is
The magnetic force on the current carrying wire is
a)
zero.
b)
into the plane of the paper.
c)
out of the plane of the paper.
d)
at an angle θ to the direction of the magnetic field.
14.
A battery is connected in series with a resistor R. The battery transfers 2 000 C of charge completely round the circuit. During this process, 2 500 J of energy is dissipated in the resistor R and 1 500 J is expended in the battery. The e.m.f. of the battery is
a)
2.00 V
b)
1.25 V
c)
0.75 V
d)
0.50 V
15.
In the circuit, which meter is not correctly connected?
a)
#1
b)
#2
c)
#3
d)
#4
16.
A charged particle of mass m and charge q is travelling in a uniform magnetic field with speed v such that the magnetic force on the particle is F. The magnetic force on a particle of mass 2m, charge q and speed 2v travelling in the same direction in the magnetic field is
a)
4F.
b)
2F.
c)
F.
d)
1/2F.
17.
The tungsten lament of a lamp has a cross-sectional area A and length L. For a potential difference V across the lament, the current in the lament is I. The resistivity of the tungsten equals
a)
A
b)
B
c)
C
d)
D
18.
Which of the following correctly gives the resistance of an ideal ammeter and resistance of an ideal voltmeter?
a)
A
b)
B
c)
C
d)
D
19.
In the diagram, a long current-carrying wire is normal to the plane of the paper. The current in the wire is directed into the plane of the paper.
Which of the arrows gives the direction of the magnetic field at point P?
Which of the arrows gives the direction of the magnetic field at point P?
a)
W
b)
X
c)
Y
d)
Z
20.
When will 1 C of charge pass a point in an electrical circuit?
a)
when 1 A moves through a potential difference of 1 V
b)
when a power of 1W is used for 1s
c)
when the current is 5 mA for 200 s
d)
when the current is 10A for 10s
21.
Two copper wires of the same length but different diameters carry the same current. Which statement about the flow of charged particles through the wires is correct?
a)
Charged particles are provided by the power supply. Therefore the speed at which they travel depends only on the voltage of the supply.
b)
The charged particles in both wires move with the same average speed because the current in both wires is the same.
c)
The charged particles move faster through the wire with the larger diameter because there is a greater volume through which to flow.
d)
The charged particles move faster through the wire with the smaller diameter because it has a larger potential difference applied to it.
22.
A power cable X has resistance R and carries current I.
A second cable Y has resistance 2R and carries current 1/2I.
What is the ratio: power dissipated in Y / power dissipated in X ?
A second cable Y has resistance 2R and carries current 1/2I.
What is the ratio: power dissipated in Y / power dissipated in X ?
a)
1/4
b)
1/2
c)
2
d)
4
23.
The diagram shows a circuit with four voltmeter readings V, V1, V2 and V3.
Which equation relating the voltmeter readings must be true?
Which equation relating the voltmeter readings must be true?
a)
V=V1+V2+V3
b)
V+V1=V2+V3
c)
V3 = 2(V2)
d)
V–V1=V3
24.
In the circuit shown, the battery and ammeter each have negligible resistance. The following combinations of resistors are placed in turn between the terminals X and Y of the circuit. Which combination would give an ammeter reading of 8 A?
a)
A
b)
B
c)
C
d)
D
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