PHY101 - Physics - Question No: 1 ( M - 1 )
As a 2.0-kg block travels around a 0.50-m radius circle it has an angular speed of
12 rad/s. The circle is parallel to the xy plane and is centered on the z axis, a
distance of 0.75m from the origin. The z component of the angular momentum
around the origin is:
► 6.0kg · m2/s
► 9.0kg · m2/s
► 11 kg · m2/s
► 14 kg · m2/s
PHY101 - Physics - Question No: 2 ( M - 1 )
A net torque applied to a rigid object always tends to produce:
► linear acceleration
► rotational equilibrium
► angular acceleration
► rotational inertia
PHY101 - Physics - Question No: 3 ( M - 1 )
An object attached to one end of a spring makes 20 vibrations in 10 s. Its angular
frequency is:
► 1.57 rad/s
► 2.0 rad/s
► 6.3 rad/s
PHY101 - Physics - Question No: 4 ( M - 1 )
In simple harmonic motion, the restoring force must be proportional to the:
► amplitude
► frequency
► velocity
► displacement
PHY101 - Physics - Question No: 5 ( M - 1 )
Mercury is a convenient liquid to use in a barometer because:
► it is a metal
► it has a high boiling point
► it expands little with temperature
► it has a high density
PHY101 - Physics - Question No: 6 ( M - 1 )
The units of the electric field are:
► J/m
► J/(C·m)
► J/C
► J·C
PHY101 - Physics - Question No: 7 ( M - 1 )
A farad is the same as a
► J/V
► V/J
► C/V
► V/C
We desire to make an LC circuit that oscillates at 100 Hz using an inductance of
2.5H. We also need a capacitance of:
► 1 F
► 1mF
► 1 μF
► 100 μF
PHY101 - Physics - Question No: 9 ( 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: 10 ( M - 1 )
Which of the following statements is NOT TRUE about electromagnetic
waves?
► Electromagnetic waves satisfy the Maswell's Equation.
► Electromagnetic waves can not travel through space.
► The receptions of electromagnetic waves require an antenna.
► The electromagnetic radiation from a burning candle is
unpolarized.
PHY101 - Physics - Question No: 11 ( M - 1 )
Radio waves and light waves are ____________________________.
► Longitudinal waves
► Transverse waves
► Electromagnetic and transverse both
► Electromagnetic and longitudinal both
PHY101 - Physics - Question No: 12 ( M - 1 )
Wien's Law states that, lmax = ________ K.
► 2.90 * 10-3 Hertz
► 2.90 * 10-3 s
► 2.90 * 10-3 kg
► 2.90 * 10-3 m
PHY101 - Physics - Question No: 13 ( M - 1 )
Interference of light is evidence that:
► the speed of light is very large
► light is a transverse wave
► light is a wave phenomenon
► light is electromagnetic in character
PHY101 - Physics - Question No: 14 ( M - 1 )
Fahrenheit and Kelvin scales agree numerically at a reading of:
► -40
► 0
► 273
► 574
PHY101 - Physics - Question No: 15 ( M - 1 )
According to the theory of relativity:
► moving clocks run fast
► energy is not conserved in high speed collisions
► the speed of light must be measured relative to the ether
► none of the above are true
PHY101 - Physics - Question No: 16 ( M - 1 )
Light from a stationary spaceship is observed, and then the spaceship moves
directly away from the observer at high speed while still emitting the light. As
a result, the light seen by the observer has:
► higher frequency and a longer wavelength than before
► lower frequency and a shorter wavelength than before
► higher frequency and a shorter wavelength than before
► lower frequency and a longer wavelength than before
PHY101 - Physics - Question No: 17 ( M - 1 )
How fast should you move away from a 6.0 × 1014 Hz light source to observe
waves with a frequency of 4.0 × 1014 Hz?
► 20c
► 38c
► 45c
► 51c
PHY101 - Physics - Question No: 18 ( M - 1 )
The quantum number n is most closely associated with what property of the
electron in a hydrogen atom?
► Energy
► Orbital angular momentum
► Spin angular momentum
► Magnetic moment
PHY101 - Physics - Question No: 19 ( M - 1 )
The quantum number ms is most closely associated with what property of the
electron in an atom?
► Magnitude of the orbital angular momentum
► Energy
► z component of the spin angular momentum
► z component of the orbital angular momentum
PHY101 - Physics - Question No: 20 ( M - 1 )
As the wavelength of a wave in a uniform medium increases, its speed will _____.
► Decrease
► Increase
► Remain the same
► None of these
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:
2π rad
► 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 3
Ω, 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
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
PHY101 - Physics - Question No: 20 ( M - 1 )
A large collection of nuclei are undergoing alpha decay. The rate of decay at any
instant is proportional to:
► the number of undecayed nuclei present at that instant
► the time since the decays started
► the time remaining before all have decayed
► the half-life of the decay
