JS01 Physics
Name:
Which of the following statement is true regarding Bohr's postulates?
Electrons revolve around atom in an elliptical orbit
When electrons jump from higher to lower energy levels, energy is absorbed.
Electrons revolve in very unstable orbits with fixed energy values.
The energy absorbed or emitted is in the form of Radiation.
N/A
The ratio of time periods for an object falling freely for a fixed distance is.
1 : 3 : 5 :
1.41 : 1.73 : 2
0.4 : 0.33 : 0.27
0.34 : 0.23 : 0.12
N/A
International Space station and Geostationary satellites are located respectively at
408 km, 3580 km
3580 km, 408 km
408 km, 35800 km
35800 km, 408 km
N/A
A boat is moving with a speed 8 km/hr. If the speed of the boat alone is 6.92 km/hr. What is that angle of the boat making with the flow of the river? (Hint: 6.92 is 4 * 1.73)
30
150
120
60
N/A
In Davisson Germar's experiment, the maximum Intensity of electrons diffracted was observed at a voltage _____
64 V
54 V
45 V
60 V
N/A
An object of mass m moves with a constant speed in a circular path of Radius R under the action of a force constant magnitude F. The Kinetic Energy of the object is
0.5 FR
FR
2 FR
0.25 FR
N/A
Four persons P, Q , R and S are initially at four corners of a square of side d. Each person now moves with a constant speed v in such a way that P always moves directly towards Q, Q towards R, R towards S, S towards P. The four persons will meet after the time
d/2v
They will never meet
3d/2v
d/v
N/A
Which of the statement is correct for the given graph?
Velocity is variable till 4th second and constant from 4th to 6th second.
Acceleration is constant till 4th second and there is no acceleration from 4th to 6th second.
There is no acceleration at any instant.
There is no velocity at any instant.
N/A
Distance x is given by x = 60 t - 12 t^2. The body does
Acceleration = 12 m/s^2
Retardation = 12 m/s^2
Acceleration = 48 m/s^2
Retardation = 48 m/s^2
N/A
The height at which the weight of the body becomes 1/16th of its weight on the surface of the earth is (R=Radius of Earth)
4R
5R
15R
3R
N/A
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