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WorksheetsPHY 102 Pre-exam
Total questions: 45
Worksheet time: 23mins
The SI unit of electric charge is:
Volt
Ampere
Coulomb
Joule
Coulomb's law states that the electrostatic force between two charges is proportional to:
The sum of charges
The product of charges
The difference of charges
None
The electrostatic force is:
Always attractive
Always repulsive
Either attractive or repulsive
Independent of charges
The electric field intensity due to a point charge is:
E = F/q
E = Fq
q/F
q/r²
Electric field lines:
Intersect each other
Never intersect
Are parallel lines
Form closed loops always
The potential at infinity due to a point charge is taken as:
Zero
One
Infinity
Undefined
The SI unit of electric potential is:
Newton
Coulomb
Volt
Joule
A positive test charge placed in an electric field experiences a force:
Along the field lines
Opposite the field lines
At 90° to the field lines
None
The work done in moving a charge in an electrostatic field depends on:
The path taken
The end points only
The medium only
None
Equipotential surfaces are always:
Parallel lines
Perpendicular to electric field lines
Tangent to field lines
None
The electric flux through a closed surface depends on:
The shape of the surface
The charges enclosed
The distance of charges outside
Both A and C
Gauss's law relates electric flux to:
Magnetic field
Charge enclosed
Voltage
Resistance
The electric field inside a conductor in electrostatic equilibrium is:
Maximum
Zero
Constant
Infinite
The capacitance of a parallel plate capacitor increases when:
Plate area decreases
Distance between plates increases
Dielectric constant increases
Dielectric is removed
The force between two charges separated by distance r is:
F = k((Q1Q2)/r2)
F = kQ1Q2r2
F = (Q1Q2)/r
F = k((Q1+Q2)/r2)
The SI unit of electric current is:
Watt
Ampere
Ohm
Coulomb
Current is defined as:
Rate of flow of charge
Force per unit charge
Energy per unit charge
Resistance per unit charge
The current density J is given by:
J = I/A
J = IA
J = I × R
J = V/I
The relation V = IR is known as:
Coulomb's law
Ohm's law
Gauss's law
Faraday's law
The resistance of a wire is proportional to:
Its length
Its cross-sectional area
Square of its length
Temperature only
The unit of resistivity is:
Ohm-meter
Ohm
Coulomb
Watt
Conductors allow:
Free movement of charges
No charges
Partial charge movement
Only negative charges
The drift velocity of electrons is:
Very high
Very small
Infinite
Zero
The power dissipated in a resistor is:
P = VI
P = I/R
P = V/R
P = V + I
When resistors are connected in series, the total resistance is:
Smaller than each resistor
Larger than each resistor
Equal to the smallest
Zero
When resistors are connected in parallel, the equivalent resistance is:
Larger than each
Smaller than each
Same as one resistor
Infinite
Kirchhoff's current law states that:
Current entering a junction equals current leaving
Voltage around a loop is zero
Resistance is proportional to length
Charge is quantized
The unit of electric conductivity is:
S/m
Ohm
Coulomb
Joule
A superconductor has resistance equal to:
Very large
Zero
Small but finite
Infinite
The heating effect of current is given by:
Joule's law
Coulomb's law
Gauss's law
Ohm's law
The SI unit of magnetic field is:
Tesla
Weber
Henry
Ampere
The direction of magnetic field around a current-carrying conductor is given by:
Fleming's left hand rule
Right-hand grip rule
Ohm's law
Ampere's law
The magnetic flux is measured in:
Henry
Weber
Tesla
Joule
The force on a charge q moving with velocity v in a magnetic field B is:
F = qvB sin θ
F = qvB
F = qB/v
F = qv/B
Magnetic lines of force:
Begin and end on charges
Form closed loops
Intersect each other
Are straight
Earth's magnetic field has:
Only vertical component
Only horizontal component
Both vertical and horizontal components
No components
A magnetic material strongly attracted by a magnet is:
Diamagnetic
Ferromagnetic
Paramagnetic
Non-magnetic
A diamagnetic material is:
Weakly repelled by magnetic field
Strongly attracted
Not affected
Strongly repelled
Which of the following is paramagnetic?
Aluminium
Copper
Gold
Bismuth
The unit of magnetic moment is:
A·m²
A/m
Wb/m²
T·m
The angle between geographic north and magnetic north is:
Declination
Dip
Latitude
Longitude
A solenoid carrying current behaves like:
A straight conductor
A bar magnet
A capacitor
An insulator
The force between two parallel current-carrying conductors is due to:
Electric field
Magnetic field
Gravity
Resistance
The unit of magnetic permeability is:
H/m
Wb
T
A
The device that measures magnetic field strength is:
Ammeter
Galvanometer
Magnetometer
Voltmeter
