Fs cos θ
Fs cosec θ
Fs sec θ
Fs sin θ
Fs tan θ
Correct answer is A
No explanation has been provided for this answer.
Which of the following will reduce the frequency of oscillation of a simple pendulum?
Decreasing the length of the string
Increasing the amplitude of oscillation
Increasing the length of the string
Increasing the mass of the bob
Reducing the mass of the bob.
Correct answer is C
No explanation has been provided for this answer.
Which of the following statements is correct?
Alpha particles have a large mass and high penetrating power
Alpha particles have a small mass and a low penetrating power
Beta partials have no mass and a high penetrating power
Beta particles have a large mass and a low penetrating power
Gamma rays have no mass and a high penetrating power
Correct answer is E
No explanation has been provided for this answer.
The charge of an alpha particle can be neutralized by
1 beta particle
2 photons of gamma rays
2 beta particles
4 beta particles
4 photons of gamma rays
Correct answer is C
No explanation has been provided for this answer.
Which of the following is used for shielding radioactive fallout?
Aluminum
Lead
Iron
Plastic
Wood
Correct answer is B
No explanation has been provided for this answer.
I only
III only
I and II only
I and III only
II and III only
Correct answer is D
No explanation has been provided for this answer.
12ms-1
7ms-1
6ms-1
5ms-1
4ms-1
Correct answer is D
No explanation has been provided for this answer.
Which of the following is NOT a component of an a.c. generator?
Armature
Carbon brushes
Magnet
Slip ring
Split rings
Correct answer is E
No explanation has been provided for this answer.
Which of the following is a non-renewable energy source?
Coal
Hydro
Ocean waves
Solar
Tides
Correct answer is A
Most non-renewable energy sources are fossil fuels: coal, petroleum, and natural gas
I only
II only
I and II only
II and III only
I, II and III
Correct answer is D
No explanation has been provided for this answer.
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