Important MCQ's for PIEAS Entry Test
- A child walks 5 meters north, then 4 meters east and finally 2 meters south. What is the magnitude of resultant displacement of the child after the entire walk?
- a) 1m
- b) 3m
- c) 5m
- d) 11m
2. A ball is dropped from the roof at the same time as another ball is thrown upward from the roof. The two balls_______
- a) Have the same velocity when they reaches the ground
- b) Have the same acceleration when they reaches the ground
- c) Reach the ground at the same time
- d) None of these
3. An inelastic collision conserves
- a) Momentum but not KE
- b) Both momentum and KE
- c) KE but not momentum
- d) Neither momentum not K
4. If 1 joule of work is required to move 1 coulomb charge between two points in an electriv field, the potential difference between two points is
- a. 1*10^0 V
- b. 6.3*10^18 V
- c. 9.0*10^9 V
- d. 1.6*10^-19 V
5. The magnetic field of an electromagnetic wave is
- a. Parallel to electric field and to the wave direction
- b. Parallel to the electric field and perpendicular to wave direction
- c. Perpendicular to electric field and to the wave direction
- d. Perpendicular to electric field and parallel to wave direction
6. A physics student notices that 4 waves arrive at the beach every 2 seconds. The frequency of these waves is
- a. 80 Hz
- b. 16 Hz
- c. 5 Hz
- d. 0.2 Hz
7. The resolution power of the lens can be improved by increasibg which of the following
- a. The diameter of the lens
- b. The object distance
- c. The wavelength of the light
- d. The brightness of the light
8. What is the approximate electrostatic force between two protons separated by the distance of 1*10^-6 m
- a. 2.3*10^-6 N and repulsive
- b. 2.3*10^-6 N and attractive
- c. 9.0*10^21 N and repulsive
- d. 9.0*10^21 N and attractive
9. Beta rays are the electrons
- a. Knocked out from the outershell of the atom
- b. Knocked out from the innershell of an atom
- c. Electrons which are located inside the nucleus
- d. None
10. A certain radionuclide has a half life of 1 day. Starting from 1.00 g of nuclide the amount left after 3 days will be
- a. 0.333 g
- b. 0.250 g
- c. 0.125 g
- d. 0.062 g
11. An object with mass 4 kg is kept motionless on an inclined plane by aforce parallel to the plane. The angle of the plane from the horizontal is 30 degree. The object is at vertical height of 10 meters above the bottom,friction is negligible. The force in Newton is
- a. 19.6
- b. 9.8
- c. 4.9
- d. 39.2
12. If the length of the simple pendulum is reduced to half and the mass is doubled then the period is
- a. Remains unchanged
- b. Halved
- c. Doubled
- d. Decreases by a factor √2
13. If two sounds have the same wavelength in air at the same temperature what other property they must have same
1. Intensity
2. Amplitude
3. Frequency
- a. 1 and 2 only
- b. 3 only
- c. 1 only
- d. 2 and 3 only
14. At a particular instant water comes out of the valve at bottom of the tank with a speed of 20 ft/s. the height of the water in the tank is
- a. 20 ft
- b. 12.5 ft
- c. 6.25 ft
- d. 25 ft
15. A network of three 5 ohm resistors cannot have an equivalent resistance of
- a. 7.5 ohm
- b. 2.5 ohm
- c. 1.67 ohm
- d. 15 ohm
16. All of the following can become good magnets except
- a. Nickel
- b. Cobalt
- c. Iron
- d. Copper
17. Which of the following formulas has the correct units for the linear momentum of photon
- a. Hv/c
- b. Hc/v
- c. Hc/lambda
- d. Lambda/hc
19. Two wires of the same length and material have the diameter of A twice that of wire B. If the resistance of wire B is R, then the resistance of wire A is
- a. R/4
- b. R/2
- c. R
- d. 4R
20. A circuit that contains 0.5 µF , a 20 mH inductor and 8.0 Ω resistor has a resonance frequency of
- a. 10 kHz
- b. 1.6 kHz
- c. 1.0 kHz
- d. 2000 kHz
21. A change in temperature of 45 degree centigrade corresponds to a change in degree fahrenhiet of
- a. 81 degree Fahrenheit
- b. 45 degree Fahrenhiet
- c. 25 degree Fahrenheit
- d. 113 degree Fahrenhiet
22. A virtual image can be obtained by1. Plano mirror2. Convex lens3. Concave lens
- a. 1 and 3 only
- b. 1 and 2 only
- c. 1 only
- d. 1,2 and 3
23. Light with energy E is incident upon a surface area (A) per unit time (T). Simplify the units for E/(A*t).
24. What is energy of a 600 nm red light photon?
25.What is orbital speed of a satellite at the height of 8000 km above earth where value of g=6.2 m/s2?
26. What is the angle between equipotential lines and electric field lines? (parallel, orthogonal, acute, obtuse)
27. U23592 absorbs a neutron and emits two β particles. What will be the daughter element?
28. What quantity does change when a light
29) If a light ray propagates in direction of x-axis. In which plane is movement of its electric field? (Y-axis, X-axis, XY plane, YZ plane)
30) The transverse wave nature of light is confirmed by which phenomenon (interference, diffraction, polarization, refraction)
31) What is the best approximate for diameter of alpha particle (10-9,10-10, 10-12, 10-11)
32) What differs in two isotopes of an element (electrons, protons, neutrons, shells)
33) What changes by increasing voltage on electrodes of X-ray tube (Speed, frequency, no. of emitted photons, Energy)
34) Resistivity, length and resistance of a resistance are given, find the diameter of the wire.
35) A 450C temperature change corresponds to a change in 0F (128, 113, 450, 145)
36) Conductivity in metals depends upon (electrons, ions, molecules)
37) A spring with a constant ‘k’ is cut into three equal parts, what is the spring constant of newly formed parts? (k/3, 3k, k, None)
38) What is the total current if 6 bulbs of 100 watt are connected to 120 volts?
39) If 50 N force is used to lift 240 N weight with pulley system. And if weight is lifted 1 m by pulling rope 5 m towards us. What’s the efficiency??
40) A force of 300N lifts a mass of 120kg with help of lever whose length is 2.4 m. The distance between fulcrum and mass is
- a) 40cm
- b) 48cm
- c) 80cm
- d) 171cm
41) A satellite at 8000 km and where gravity is 6.2 what is it velocity?
42) What happens to entropy when a solid melts into liquid
- a) increase
- b) decreases
- c) remains constant
43)If the equation of a wave exhibiting SHM is : 5sin(.1t-.3x)
What is phase and what’s frequency here
44) The gravitational force of earth is F and its mass is 81 times more than of moon. Then the gravitati0nal force of m00n on earth is
- a. F
- B. F/81
- c. 81F
- d. N0ne
45) if an object is placed b/w two mirrors then hoe many images will u see?
46) If green light fall on red rose which colour will u see??
47) If electron is brought inward towards other electron. ELECTRIC P.E of system?? Increases or decrease
48) on changing direction of velocity and magnetic field, the force experienced by charge changes its direction through??
0 comments:
Confused? Feel Free To Ask
Your feedback is always appreciated. We will try to reply to your queries as soon as time allows.