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AIEEE test questions

Question 1

A body of density enters a tank of water of density ' after falling through height h. The maximum depth to which it sinks in water is

Question 2.
A charged particle q is shot towards another charged particle Q which is fixed, with speed v. It approaches Q up to a closest distance r and then returns. If q were given a speed 2v , the distance of approach would be
(a) r
(b) 2r
(c) r/2
(d) r/4

Question 3.
The Young’s modulus of a perfectly rigid body is
(a)  zero
(b)  unity
(c)  infinity
(d)  may have any finite non zero value

Question 4.
When an EM wave enters an ionised layer of earth atmosphere present in ionosphere
(a)  the electron cloud will not oscillate in the electric field of the wave
(b) the electron cloud will oscillate in the electric field of wave in  phase of sinusoidal EM wave
(c) the electron cloud will oscillate in the electric field of wave in the opposite phase of sinusoidal EM wave
(d) the electron cloud will oscillate in the electric field of wave with a phase retardation of 90 degree for a sinusoidal EM wave

Question 5.
Two bodies are charged by rubbing one against the other. During the process one becomes positively charged while other becomes negatively charged. then
(a) mass of each body remains unchanged
(b) mass of each body changes marginally
(c) mass of each body changes slightly and hence the total mass
(d) mass of each body changes slightly but total mass remains the same

1. (a)
2. (d)
3. (c)
4. (d)