PHY101 - Physics - Question No: 1 ( M - 1 )
The number of significant figures in 0.00150 is:
► 5
► 4
► 3
► 2
PHY101 - Physics - Question No: 2 ( M - 1 )
One revolution is the same as:
► 1 rad
► 57 rad
► π/2 rad
► π rad
► 2π rad
PHY101 - Physics - Question No: 3 (M - 1)
For a body to be in equilibrium under the combined action of several forces:
► All the forces must be applied at the same point
all the forces must be applied at the same point
► all of the forces form pairs of equal and opposite forces
► any two of these forces must be balanced by a third force
► the sum of the torques about any point must equal zero
PHY101 - Physics - Question No: 4 ( M - 1 )
A bucket of water is pushed from left to right with increasing speed across a
horizontal surface.
Consider the pressure at two points at the same level in the water.
► It is the same
► It is higher at the point on the left
► It is higher at the point on the right
► At first it is higher at the point on the left but as the bucket speeds up it
is lower there
PHY101 - Physics - Question No: 5 (M - 1)
An organ pipe with both ends open is 0.85m long. Assuming that the speed of sound is 340m/s, the frequency of the third harmonic of this pipe is:
► A. 200 Hz
► B. 300 Hz
► C. 400 Hz
► D. 600 Hz
PHY101 - Physics - Question No: 6 ( M - 1 )
Capacitors C1 and C2 are connected in series. The equivalent capacitance is
given by
► C1C2/(C1 + C2)
► (C1 + C2)/C1C2
► 1/(C1 + C2)
► C1/C2
PHY101 - Physics - Question No: 7 ( M - 1 )
If the potential difference across a resistor is doubled:
► only the current is doubled
► only the current is halved
► only the resistance is doubled
► only the resistance is halved
PHY101 - Physics - Question No: 8 ( M - 1 )
By using only two resistors, R1 and R2, a student is able to obtain resistances of 3Ω, 4Ω, 12Ω, and 16 Ω. The values of R1 and R2 (in ohms) are:
► 3, 4
► 2, 12
► 3, 16
► 4, 12
PHY101 - Physics - Question No: 9 ( M - 1 )
Faraday's law states that an induced emf is proportional to:
► the rate of change of the electric field
► the rate of change of the magnetic flux
► the rate of change of the electric flux
► the rate of change of the magnetic field
PHY101 - Physics - Question No: 10 ( M - 1 )
A generator supplies 100V to the primary coil of a transformer. The primary has 50 turns and the secondary has 500 turns. The secondary voltage is:
► 1000V
► 500V
► 250V
► 100V
PHY101 - Physics - Question No: 11 (M - 1)
The wavelength of red light is 700 nm. Its frequency is ____________________.
► 4.30 * 104 Hertz
► 4.30 * 103 Hertz
► 4.30 * 105 Hertz
► 4.30 * 102 Hertz
PHY101 - Physics - Question No: 12 ( M - 1 )
PHY101 - Physics - Question No: 13 ( M - 1 )
A laser in a compact disc player generates light that has a wavelength of 780 nm in air. The light then enters into the plastic of a CD. If the index of refraction of plastic is 1.55, the speed of this light once enter the plastic is ________.
► 3.00 * 108 m/s
► 1.94 * 108 m/s
► 4.29 * 108 km/h
► 3.00 * 108 km/h
PHY101 - Physics - Question No: 14 ( M - 1 )
Which of the following electromagnetic radiations has photons with the
greatest energy?
► blue light
► yellow light
► x rays
► radio waves
PHY101 - Physics - Question No: 15 ( M - 1 )
A virtual image is one:
► toward which light rays converge but do not pass through
► from which light rays diverge as they pass through
► toward which light rays converge and pass through
► from which light rays diverge but do not pass through
PHY101 - Physics - Question No: 16 ( M - 1 )
What is the unit of magnification factor?
► meter.Kelvin
► radian.Kelvin
► degree.Kelvin
► no units
PHY101 - Physics - Question No: 17 ( M - 1 )
During an adiabatic process an object does 100 J of work and its temperature
decreases by 5K. During another process it does 25 J of work and its
temperature decreases by 5 K. Its heat capacity for the second process is.
► 20 J/K
► 100 J/K
► 15 J/K
► 5 J/K
PHY101 - Physics - Question No: 18 ( M - 1 )
An ideal gas expands into a vacuum in a rigid vessel. As a result there is:
► a change in entropy
► a decrease of internal energy
► an increase of pressure
► a change in temperature
PHY101 - Physics - Question No: 19 ( M - 1 )
The Stern-Gerlach experiment makes use of:
► a strong uniform magnetic field
► a strong non-uniform magnetic field
► a strong uniform electric field
► a strong non-uniform electric field
