1
JEE Advanced 2015 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
A conductor (shown in the figure) carrying constant current I is kept in the x-y plane in a uniform magnetic field B. If F is the magnitude of the total magnetic force acting on the conductor, then the correct statements is/are
A
if B is along $$\widehat z$$, F $$\propto$$ (L + R)
B
if B is along $$\widehat x$$, F = 0
C
if B is along $$\widehat y$$, F $$\propto$$ (L + R)
D
if B is along $$\widehat z$$, F = 0
2
JEE Advanced 2015 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
In an aluminium (Al) bar of square cross section, a square hole is drilled and is filled with iron (Fe) as shown in the figure. The electrical resistivities of Al and Fe are 2.7 $$\times$$ 10$$-$$8$$\Omega$$ m and 1.0 $$\times$$ 10$$-$$7 $$\Omega$$ m, respectively. The electrical resistance between the two faces P and Q of the composite bar is
A
$${{2475} \over {64}}\mu \Omega$$
B
$${{1875} \over {64}}\mu \Omega$$
C
$${{1875} \over {49}}\mu \Omega$$
D
$${{2475} \over {132}}\mu \Omega$$
3
JEE Advanced 2015 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
For photo-electric effect with incident photon wavelength $$\lambda$$, the stopping potential is V0. Identify the correct variation(s) of V0 with $$\lambda$$ and $${1 \over \lambda }$$.
A
B
C
D
4
JEE Advanced 2015 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
Two independent harmonic oscillators of equal masses are oscillating about the origin with angular frequencies $$\omega$$1 and $$\omega$$2 and have total energies E1 and E2, respectively. The variations of their momenta p with positions x are shown in the figures. If $${a \over b} = {n^2}$$ and $${a \over R} = n$$, then the correct equations is/are
A
E1$$\omega$$1 = E2$$\omega$$2
B
$${{{\omega _2}} \over {{\omega _1}}} = {n^2}$$
C
$${\omega _1}{\omega _2} = {n^2}$$
D
$${{{E_1}} \over {{\omega _1}}} = {{{E_2}} \over {{\omega _2}}}$$
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