Physics Quiz 9

1 / 50

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

2 / 50

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

3 / 50

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

4 / 50

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

5 / 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_______________?**

6 / 50

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

7 / 50

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

8 / 50

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

9 / 50

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

10 / 50

**Dimension of pressure is__________________?**

11 / 50

**One pico stands for_________________?**

12 / 50

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

13 / 50

**Rest mass of a photon is________________?**

14 / 50

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

15 / 50

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

16 / 50

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

17 / 50

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

18 / 50

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

19 / 50

**Electromagnetic waves emitted from antenna are________________?**

20 / 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________________?**

21 / 50

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

22 / 50

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

23 / 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__________________?**

24 / 50

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

25 / 50

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

26 / 50

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

27 / 50

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

28 / 50

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

29 / 50

**Slope of velocity time graph is_____________________?**

30 / 50

**Gravitation force of moon is_________?**

31 / 50

**Unit vector n^ is along______________?**

32 / 50

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

33 / 50

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

34 / 50

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

35 / 50

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

36 / 50

**Torque acting on a body determines_______________?**

37 / 50

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

38 / 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_______________?**

39 / 50

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

40 / 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_____________?**

41 / 50

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

42 / 50

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

43 / 50

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

44 / 50

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

45 / 50

**The phase of SHM describes________________?**

46 / 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 ?**

47 / 50

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

48 / 50

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

49 / 50

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

50 / 50

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

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