Physics Quiz 9
1 / 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__________________?
2 / 50
The ration stress to strain in youngs modulus of the material then tension is__________________?
3 / 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 ?
4 / 50
A cyclist cycling around a circular racing track skids because_____________?
5 / 50
Rest mass of a photon is________________?
6 / 50
A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part _________________?
7 / 50
One pico stands for_________________?
8 / 50
The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine_______________?
9 / 50
In scientific notation, numbers are expressed in________________?
10 / 50
The centripetal acceleration produced in a rotating body is commonly due to change on_________of body?
11 / 50
p-n junction when reversed biased acts as a_______________?
12 / 50
A photon of wavelength 900nm behaves like a particle of mass______________?
13 / 50
The normal ear is the most sensitive in the frequency range___________________?
14 / 50
Radioactivity is a ______ (A) Spontaneous activity (B) Chemical property_____________?
15 / 50
The distance covered by a body in time t starting from rest is__________________?
16 / 50
The maximum safe limit dose for persons working in a nuclear power station is ________________?
17 / 50
During long jump, athlete runs before taking the jump. By doing so he__________________?
18 / 50
Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?
19 / 50
Which one of the following has the greatest energy gap ?
20 / 50
The number 76.85 is rounded off up to two significant figures as_____________?
21 / 50
The band theory of solids explains satisfactorily the nature of_________________?
22 / 50
The highest value of escape velocity in solar system is planet____________________?
23 / 50
Very weak magnetic fields are detected by___________________?
24 / 50
Dimension of pressure is__________________?
25 / 50
Excited atoms return to their ground state in_______________?
26 / 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_______________?
27 / 50
Unit vector n^ is along______________?
28 / 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_______________?
29 / 50
Torque acting on a body determines_______________?
30 / 50
Which one of the following is nearly monochromatic light ?
31 / 50
When light incident normally on thin film the path difference depends upon ________________?
32 / 50
Total distance travelled by a bob of the simple pendulum in one vibration is equal to________________?
33 / 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________________?
34 / 50
The direction of propagation of an electromagnetic waves is________________?
35 / 50
In the nucleus of uranium, the number of neutrons will be _____________?
36 / 50
Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called____________________?
37 / 50
The simplest type of rectification known as half wave rectification is obtained by____________________?
38 / 50
An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________?
39 / 50
A wire having very high value of conductance is said to be____________________?
40 / 50
The phase of SHM describes________________?
41 / 50
Electromagnetic waves emitted from antenna are________________?
42 / 50
All electrical appliances are connected in parallel to each other between the main line and neutral wire to get ______________________?
43 / 50
If stretching force T of wire increases, then its frequency __________________?
44 / 50
The power of a concave lens is_______________?
45 / 50
Gravitation force of moon is_________?
46 / 50
The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________?
47 / 50
Slope of velocity time graph is_____________________?
48 / 50
Pair production cannot take place in a vacuum as ________________?
49 / 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_____________?
50 / 50
The relation between linear and angular acceleration is______________?
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