A simple pendulum of mass m moves along an arc pf a circle radius R in a vertical plane as shown above. What is the work done by gravity in a downward swing through the angle q to 0 degree
mgR sinθ
MgR (1- cos θ)
mgR
mgR (1 - sinθ)
Correct answer is B
No explanation has been provided for this answer.
The fig above shows a uniform circular object, center R and diameter PS. A circular section 6 and Diameter PR is cut from it. if PQRS is a straight line, where is center of gravity of the figure
Q
R
A point between P and R
A point between R and S
Correct answer is D
A particle is injected perpendicularly into an electric field, it travels along a curved path as depicted in the image above,the particle is
gamma ray
electron
neutron
proton
In the circuit diagram above, the ammeter reads a current of 3A when R is 5 ohms and 6A when R is 6 ohms,the value of the unknown resistance X is
1
2
3
4
Correct answer is A
The wire X in the figure above is at right angles to the plane of the paper and carries a current into the paper. at which of the points labelled 1-4, will the magnetic flux density due to this current be in the same direction as that of the horizontal component of earth's magnetic field
Correct answer is C
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