Welcome to your Physics national exam 2012
1.
According to the kinetic theory of gases, the
2.
At t=0, an object undergoing SHM has maximum displacement of 0.650 m and angular frequency of 7.40rad/s. Which of the following is correct about the motion of the oscillator?
3.
A 0.35 kg mass attached to the end of a spring oscillates 2.5 times per second with amplitude of 0.15 m. Which of the following is true about the motion of the mass?
4.
Identify a true statement about a mechanical wave.
5.
Which one of the following is correct statement about the intensity of sound?
6.
Which of the following is correct about Doppler effect?
7.
Huygens’s principle states that
8.
Which one of the following is correct about the law of reflection and the law of refraction?
9.
Choose correct statement about interference pattern due to diffraction to light through single and doubles slits.
10.
In order for interference of light waves to occur, the interfering light waves should
12.
Which one of the following is correct about accuracy and precision of a measurement?
13.
In an experiment to measure the velocity of a ball rolling along o-axis, a student recorded the distance traveled and time taken by ball. Which of the following data represent constant of the ball?
14.
A position vector of an object
15.
Consider two force vectors in x-y plane: F1= 10 N making a 300 angle above the horizontal and F2 = 20 N making a 600 angle above the Which of the following is true?
17.
While going to school, a student travels 3 km, East and then 4 km, North in 2 hrs. The magnitude of student's average velocity and speed are, respectively
18.
A boy throws a ball vertically upward with an initial speed of 20 m/s Neglecting air resistance, which of the following is true about the motion of the ball?
19.
Choose a correct about centripetal force and centripetal acceleration.
20.
According to Newton's law of Universal Gravitation.
21.
Which one of the following is correct about diffraction of light?
22.
In Millikan’s oil drop experiment,
23.
Many chemical reactions release energy. Suppose that at the begging of a reaction, an electron and a proton are separated by 0.110 mm, and their final separation is 0.100 mm. The change in the electric potential energy in this reaction (in eV ) is
24.
When an insulator is placed in an external uniform electric field,
25.
Consider a parallel; plate capacitor with plate area A, plate separation d, charge Q, capacitance H, potential difference V and electric field E between the plates. The electrical energy density stored by the capacitor
26.
A potential difference V is applied across the ends of a uniform conducting wire of length 1 , cross -sectional area A, and containing 1 free charge carriers per unit volume. Which one of the following is true?
27.
Three resistors are connected across a battery as shown below.
The potential difference across the resistors
Rs R 2 R 3 are, respectively.
28.
According to Kirchhoff’s junction rule,
29.
Which of the following is true about galvanometer?
30.
A galvanometer has an internal persistence of 100 Ω and deflects full a small for 1 mA. The shunt resistance required to use it as an ammeter to read currents up to 1.0 A, and the resistance required to use it as a voltmeter to give a full scale deflection of 100 V are, respectively,
31.
Equilibrium is the state of an object when
32.
The fulcrum of a uniform 20 kg seesaw that is 4.0 m in long is located 2.5 in from one end. A 30 kg child sits on the long end. The weight of
33.
A materiel rod that is 4.00 m long and 0.50 CM2 in cross sectional area is found to stretch 0.20 cm under a tension of 5000 N. The Young's Modulus for this material is
34.
Which one of the following is NOT true about Pascal's principle and its application?
35.
Which one of the following is NOT correct about factors that affecting the streamlining of objects moving in a fluid?
36.
Which of the following is correct?
38.
A glass contains 12 mole of water molecule (H2O). The number of water molecules, the mass of water, and the mass of each molecule in the glass are, respectively (Molar mass of H is 1.0 g and O is 16.0 g )
39.
Which one of the following statements is correct about thermodynamic processes?
41.
Which one of the following is true about fundamental forces?
43.
Which of the following is correct about an astronaut inside an international space orbiting the Earth?
44.
Two masses of m1 and m2 are balanced on a horizontal stick of negligible mass pivoted at the center on mass of the system. If the distance from m1 to the center of mass is 3.0 m and the distance from the mass m2 to the center of mass is 0.1 in, the ratio of m1 tom2 (m1/ m2 )
45.
Identify the correct statement about energy, work, and force.
46.
Distinguish between conservative and non-conservative forces.
47.
A crane raises 75.0 kg of bricks from the ground to a height of 45.0 m in in 52.0 s a constant speed. The average power of the crane is
48.
For a rigid body rotating about a fixed axis,
49.
A disk of radius 0.10 and mass 0.1 kg is set into motion by a tangential force of 2.0 N applied at the edge of the disk. If the angular acceleration of the disk is 400rad/s2, the torque and angular velocity at 2.0 s are, respectively
50.
Identify the correct statement about torque and angular momentum.
