1.Natalie
measures the mass and speed of a glider. The percentage uncertainty in her
measurement of the mass is 3% and in the measurement of the speed is 10%. Her
calculated value of the kinetic energy of the glider will have an uncertainty
of
A. 30%.
B. 23%.
C. 13%.
D. 10%.
2.A
student measures a distance several times. The readings lie between 49.8 cm and
50.2 cm. This
measurement is best recorded as
A. 49.8 ± 0.2 cm.
B. 49.8 ± 0.4 cm.
C. 50.0 ± 0.2 cm.
D. 50.0 ± 0.4 cm.
3.The
power dissipated in a resistor of resistance R carrying a current I
is equal to I2R. The value of I has an
uncertainty of ±2% and the value of R has an uncertainty of ±10%. The
value of the uncertainty in the calculated power dissipation is
A. ±8%.
B. ±12%.
C. ±14%.
D. ±20%.
4.Which
one of the following is a fundamental unit?
A. Coulomb
B. Ohm
C. Volt
D. Ampere
5.A
student measures two lengths as follows:
T = 10.0 ± 0.1 cm
S = 20.0 ± 0.1 cm.
S = 20.0 ± 0.1 cm.
The
student calculates:
FT, the fractional
uncertainty in T
FS, the fractional uncertainty in S
FT–S, the fractional uncertainty in (T – S)
FT+S, the fractional uncertainty in (T + S).
FS, the fractional uncertainty in S
FT–S, the fractional uncertainty in (T – S)
FT+S, the fractional uncertainty in (T + S).
6.Which of these uncertainties has the largest
magnitude?
A. FT
B. FS
C. FT–S
D. FT+S
7.The
volume V of a cylinder of height h and radius r is given
by the expression
V
= πr2h.
In a particular experiment, r is
to be determined from measurements of V and h. The uncertainties
in V and in h are as shown below.
V

± 7%

h

± 3%

The approximate uncertainty in r is
A. 10%.
B. 5%.
C. 4%.
D. 2%.
8.The
radius of a loop is measured to be (10.0 ± 0.5) cm. Which of the following is
the best estimate of the uncertainty in the calculated area of the loop?
A. 0.25%
B. 5%
C. 10%
D. 25%
9.The
relationship between two measured quantities P and Q is of the
form
P
= kQn
where
k and n are constants.
A plot of lg P (yaxis)
against lg Q (xaxis) will enable the value of k to be
determined by measuring only
A. the intercept on the lg P axis.
B. the intercept on the lg Q axis.
C. the slope of the graph.
D. the reciprocal of the slope of the graph.
10.The
volume V of a cylinder of height h and radius r is given
by the expression
V
= pr2h.
In a particular experiment, r
is to be determined from measurements of V and h. The
uncertainties in V and in h are as shown below.
V

±7%

h

±3%

The
approximate uncertainty in r is
A. 10%.
B. 5%.
C. 4%.
D. 2%.