1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
A wire carrying current $$I$$ has the shape shown in adjoining figure.

AIPMT 2015 Cancelled Paper Physics - Moving Charges and Magnetism Question 63 English
Linear parts of the wire are very long and parallel to X-axis while semicircular protion of radius R is lying in Y-Z plane. Magtnetic field at pont $$O$$ is
A
$$\overrightarrow B = - {{{\mu _0}I} \over {4\pi R}}\left( {\pi \widehat i + 2\widehat k} \right)$$
B
$$\overrightarrow B = {{{\mu _0}I} \over {4\pi R}}\left( {\pi \widehat i - 2\widehat k} \right)$$
C
$$\overrightarrow B = {{{\mu _0}I} \over {4\pi R}}\left( {\pi \widehat i + 2\widehat k} \right)$$
D
$$\overrightarrow B = - {{{\mu _0}I} \over {4\pi R}}\left( {\pi \widehat i - 2\widehat k} \right)$$
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
A resistance 'R' draws power 'P' when connected to an AC source. If an inductance is now placed in series with the resistance, such that the impedance of the circuit becomes 'Z'. the power drawn will be
A
$$P\left( {{R \over Z}} \right)$$
B
P
C
$$P{\left( {{R \over Z}} \right)^2}$$
D
$$P\sqrt {{R \over Z}} $$
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
A radiation of energy 'E' falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (C = Velocity of light)
A
$${{2E} \over {{C^2}}}$$
B
$${E \over {{C^2}}}$$
C
$${E \over C}$$
D
$${{2E} \over C}$$
4
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
For a parallel beam of monochromatic light of wavelength '$$\lambda $$' , diffraction is produced by a single slit whose width 'a' is of the order of the wavelength of the light. If 'D' is the distance of the screen from the slit, the wifth of the central maxima will be
A
$${{Da} \over \lambda }$$
B
$${{2Da} \over \lambda }$$
C
$${{2D\lambda } \over a}$$
D
$${{D\lambda } \over a}$$
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