Physics Quiz 9

1 / 50

**The centripetal acceleration produced in a rotating body is commonly due to change on_________of body?**

2 / 50

**The simplest type of rectification known as half wave rectification is obtained by____________________?**

3 / 50

**Which one of the following is nearly monochromatic light ?**

4 / 50

**A cyclist cycling around a circular racing track skids because_____________?**

5 / 50

**Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called____________________?**

6 / 50

**The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is________________?**

7 / 50

**The direction of propagation of an electromagnetic waves is________________?**

8 / 50

**The relation between linear and angular acceleration is______________?**

9 / 50

**The maximum safe limit dose for persons working in a nuclear power station is ________________?**

10 / 50

**p-n junction when reversed biased acts as a_______________?**

11 / 50

**Three students measured the length of a needle with meter rod and recorded as : (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is a correct record ?**

12 / 50

**Which one of the following has the greatest energy gap ?**

13 / 50

**The power of a concave lens is_______________?**

14 / 50

**A convex lens of focal length f1 and a concave lens of focal length f2 are placed in contact. The focal length of the combination is_____________?**

15 / 50

**The phase of SHM describes________________?**

16 / 50

**Total distance travelled by a bob of the simple pendulum in one vibration is equal to________________?**

17 / 50

**The number 76.85 is rounded off up to two significant figures as_____________?**

18 / 50

**Torque acting on a body determines_______________?**

19 / 50

**Pair production cannot take place in a vacuum as ________________?**

20 / 50

**When light incident normally on thin film the path difference depends upon ________________?**

21 / 50

**Excited atoms return to their ground state in_______________?**

22 / 50

**The highest value of escape velocity in solar system is planet____________________?**

23 / 50

**One pico stands for_________________?**

24 / 50

**Slope of velocity time graph is_____________________?**

25 / 50

**The displacement of SHM is written as X = X`sin?t if the displacement is written by X = X? sont then phase constant will be equal to_______________?**

26 / 50

**The distance covered by a body in time t starting from rest is__________________?**

27 / 50

**An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________?**

28 / 50

**The band theory of solids explains satisfactorily the nature of_________________?**

29 / 50

**Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?**

30 / 50

**Moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be_______________?**

31 / 50

**Unit vector n^ is along______________?**

32 / 50

**Gravitation force of moon is_________?**

33 / 50

**A wire having very high value of conductance is said to be____________________?**

34 / 50

**The normal ear is the most sensitive in the frequency range___________________?**

35 / 50

**Very weak magnetic fields are detected by___________________?**

36 / 50

**The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________?**

37 / 50

**All electrical appliances are connected in parallel to each other between the main line and neutral wire to get ______________________?**

38 / 50

**During long jump, athlete runs before taking the jump. By doing so he__________________?**

39 / 50

**In scientific notation, numbers are expressed in________________?**

40 / 50

**The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine_______________?**

41 / 50

**A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part _________________?**

42 / 50

**In the nucleus of uranium, the number of neutrons will be _____________?**

43 / 50

**Rest mass of a photon is________________?**

44 / 50

**If stretching force T of wire increases, then its frequency __________________?**

45 / 50

**Radioactivity is a ______ (A) Spontaneous activity (B) Chemical property_____________?**

46 / 50

**The value of the steady current which when flowing through the same resistor produces heat at the same rate as the mean rate of heat produced by the alternating current is__________________?**

47 / 50

**Dimension of pressure is__________________?**

48 / 50

**The ration stress to strain in youngs modulus of the material then tension is__________________?**

49 / 50

**A photon of wavelength 900nm behaves like a particle of mass______________?**

50 / 50

**Electromagnetic waves emitted from antenna are________________?**

Provide Your Information