Thursday, 18 September 2014

MULTIPLE CHOICE PHYSICS QUESTIONS


1.       When a voltage V of 12.2 V is applied to a DC motor, the current I in the motor is 0.20 A. Which one of the following is the output power VI of the motor given to the correct appropriate number of significant digits?
A.      2 W
B.      2.4 W
C.      2.40 W
D.      2.44 W
2.Which one of the following lists a fundamental unit and a derived unit?

A.
ampere
second
B.
coulomb
kilogram
C.
coulomb
newton
D.
metre
kilogram
3.A student measures the current in a resistor as 677 mA for a potential difference of 3.6 V. A calculator shows the resistance of the resistor to be 5.3175775 Ω. Which one of the following gives the resistance to an appropriate number of significant figures?
A.      5.3 Ω
B.      5.32 Ω
C.      5.318 Ω
D.      5.31765775 Ω

4.Which one of the following is a vector quantity?
A.      Electric power
B.      Electrical resistance
C.      Electric field strength
D.      Electric potential difference

5.The diameter of a proton is of the order of magnitude of
A.      10–12 m.
B.      10–15 m.
C.      10–18 m.
D.      10–21 m.


6.Which one of the following is a scalar quantity?
A.      Pressure
B.      Impulse
C.      Magnetic field strength
D.      Weight
7.The resistive force F acting on a sphere of radius r moving at speed v through a liquid is given by
F = cvr
          where c is a constant. Which of the following is a correct unit for c?
A.      N
B.      N s–1
C.      N m2 s–1
D.      N m–2 s


8  Which one of the following contains three fundamental units?
A.
Metre
Kilogram
Coulomb
B.
Second
Ampere
Newton
C.
Kilogram
Ampere
Kelvin
D.
Kelvin
Coulomb
Second



9.The kWh is equal to
          A.      1.0 × 103 J.
          B.      3.6 × 103 J.
          C.      6.0 × 104 J.
          D.      3.6 × 106 J.
10.Which one of the following measurements is stated correctly to two significant digits?
A.      0.006 m
B.      0.06 m
C.      600 m
D.      620 m
11.Sub-multiples of units may be expressed using a prefix. Which one of the following lists the prefixes in decreasing order of magnitude?
A.
centi-
micro-
milli-
nano-
B.
milli-
centi-
nano-
micro-
C.
centi-
milli-
micro-
nano-
D.
milli-
micro-
centi-
nano-
12.Which one of the following includes three vector quantities?
A.
velocity
weight
field strength
B.
weight
mass
field strength
C.
velocity
energy
weight
D.
mass
energy
field strength

 13.The length of a page of the examination paper is approximately 30 cm.
    Which of the following gives the order of magnitude for the time taken for light to travel the length of the    page?
A.      10–7 s
B.      10–8 s
C.      10–9 s
D.      10–10 s      
14.The mass of a body is measured to be 0.600 kg and its acceleration to be 3 m s–2. The net force on the body, expressed to the correct number of significant figures is
A.      1.8 N.
B.      1.80 N.
C.      2 N.
D.      2.0 N.

15.The kilowatt-hour (kW h) is equivalent to
A.      6.0×104 J .
B.      6.0×104W .
C.      3.6×106 J .
D.      3.6×106W .
16.Which of the following contains three scalar quantities?
A.
mass
charge
speed
B.
density
weight
mass
C.
speed
weight
charge
D.
charge
weight
density 17.The order of magnitude of the weight of an apple is
A.      10–4 N.
B.      10–2 N.
C.      1 N.
D.      102 N.