Physics MCQ Quiz Hub

1. Name a device through which the truthness of the human being is examined?
 Paicnometer
Quadrant
Polygraph
Radiometer

2. Which devise is used to measure the intensity of the earthquake?
Seismograph
Oscilliograph
 Comograph
 Cardiograph

3. Which device is used to listen the vibrations of the heart and lungs?
Spectroscope
Stethoscope
 Stereoscope
None of the above

4. What is the formula for calculating resistivity of the material of a conductor?
Resistivity = R * A/ L
Resistivity = R + A/ I
Resistivity = R - A/ I
Resistivity = R * A

5. What is the SI unit of resistivity?
Meter
Watt
Ohm-metre
Volt

6. On what does the resistivity of a substance depends?
Length
Thickness
Temperature
All of the above

7. What is the resistivity of aluminium?
 2.63 * 10-8 ohm-meter
1.60 * 10-8 ohm-meter
44 * 10-8 ohm-meter
184.0 * 10-8 ohm-meter

8.  Which of the following metals has the lowest resistivity?
Nickel
Manganese
Silver
Mercury

9. Which alloy is used to make the heating elements of electric iron, electric kettle, geysers etc.?
Constantan
Manganin
Nichrome
All of the above

10.  The heating elements of electric iron and toaster are made of:
Metals
Alloys
Glass
Hard rubber

11. Semi-conductors are used for making:
Solar cells
 Toasters
 Geysers
Room heaters

12. Which of the following are semi-conductors?
Nichrome
Copper
 Silicon
Aluminium

13. What is the SI unit of electric power?
Coulomb
Watt
Volt
 Meter

14. Which of the following is measured in Pa (Pascal)?
Thrust
Pressure
Frequency
Conductivity

15. Why the Planets do not twinkle?
Because they emit light of a constant intensity
Because their distance from the earth does not change with time
Because they are very far away from the earth resulting in decrease in intensity of light
Because they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable

16. What make the metals are good conductors of electricity?
Because they contain free electrons
Because the atoms are lightly packed
Because they have high melting point
All of the above

17. What will happen to the water when a thin capillary tube is replaced with another insufficient length of tube?
will overflow
will not rise
depressed
change its meniscus

18. Which of the following is the correct pair that have not identical dimension of physical quantities?
Pressure and Young's modules
Planck's constant and Angular momentum
Impelling force or strength and moment of force
Physical energy or intensity and rate of change of linear momentum

19. Which of the following is the correct function of Rectifiers (convertor)?
Direct current to Alternating current
Alternating current to Direct current
High voltage to low voltage
Low voltage to high voltage

20. Which of the following is not emitted by radioactive substance?
Electrons
Electromagnetic radiations
Alpha particles
Neutrons

21. Which of the following statement (s) is/are correct about viscosity?
It is a measure of its resistance to gradual deformation by shear stress or tensile stress.
It is typically measured in dynes/cm, the force in dynes required to break a film of length 1 cm.
It is the ability of a body to resist a distorting influence or stress and to return to its original size and shape when the stress is removed.
None of the above

22. Which of the following is the property of RADAR?  
Locating submerged submarines
Receiving signals in a radio receiver
Locating geostationary satellites
Detecting and locating the position of objects such as aeroplanes

23.  Which of the following is the function of superconductor?
It conduct electricity at low temperature
It offer high resistance to the flow of current
It offer no resistance to the flow of electricity
 It conduct electricity at high temperatures

24. Which of the following devices is run by power circuit in the house?
 Tube-lights
Electric iron
 Television
Radio

25. Which of the following wires is necessary in the house?
Live wire
Earth wire
Neutral wire
All of the above

26. Which colour of insulation covering is there on the earth wire that goes from main switch to our rooms?
 Red
Black
Green
Yellow

27. What is the advantage of parallel connection of circuits?
Same voltage is available
All appliances get fused
Fluctuation
All of the above

28.  Which of the following statement(s) is/are correct about the Refraction Rules for a Diverging Lens?
Any incident ray travelling parallel to the principal axis of a diverging lens will refract through the lens and travel in line with the focal point (i.e., in a direction such that its extension will pass through the focal point).
Any incident ray travelling towards the focal point on the way to the lens will refract through the lens and travel parallel to the principal axis.
Both A & B
None of the above

29.  Which of the following is/are the components of Camera?
The body which is light tight and contains all the mechanical parts.
The lens which is a convex (converging) lens).
The film or a charged couple device in the case of a digital camera.
 All of the above

30. Which of the following statement(s) is/are correct about Refraction Rules for a Converging Lens?
 Any incident ray travelling parallel to the principal axis of a converging lens will refract through the lens and travel through the focal point on the opposite side of the lens.
Any incident ray travelling through the focal point on the way to the lens will refract through the lens and travel parallel to the principal axis.
Both A & B
None of the above

31. Who discovered the magnetic field of current?
 William Gilbert
Hans Christian Oersted
Benjamin Franklin
Charles Augustin de Coulomb

32. Magnetic effect of current gives rise to which force?
Mechanical
Friction
Spring
Gravitational

33. Magnetic effect around a wire is due to:
 The presence of metal
Current flowing in it
Circular loop
No current in it

34. Which of the following utilise magnetic effect of current?
Electric motor
Telephone
Radio
All of the above

35. What kind of magnetic field lines will be produced around a straight wire carrying current?
Bigger circles
Straight
Concentrated circles
Parallel straight

36. According to Maxwell’s right-hand thumb rule, what gives the direction of magnetic field lines around the wire?
Direction of thumb
Direction of fingers encircling wire
Direction opposite to thumb
Direction of index finger

37.  Maxwell’s right-hand thumb rule is also known as:
Biot-Savart law
Hall Effect
Born rule
Corkscrew rule

38. Which of the following current carrying wires will have strong magnetic field?
Straight
Circular loop
 Solenoid
All of the above

39. The strength of magnetic field produced by a current carrying circular coil can be increased by:
Increasing number of turns of wire
 Increasing current flow
 Decreasing radius of coil
All of the above