1
JEE Main 2016 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
In an experiment for determination of refractive index of glass of a prism by $$i - \delta ,$$ plot it was found thata ray incident at angle $${35^ \circ }$$, suffers a deviation of $${40^ \circ }$$ and that it emerges at angle $${79^ \circ }.$$ In that case which of the following is closest to the maximum possible value of the refractive index?
A
$$1.7$$
B
$$1.8$$
C
$$1.5$$
D
$$1.6$$
2
JEE Main 2016 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Two identical wires $$A$$ and $$B,$$ each of length $$'l'$$, carry the same current $$I$$. Wire $$A$$ is bent into a circle of radius $$R$$ and wire $$B$$ is bent to form a square of side $$'a'$$. If $${B_A}$$ and $${B_B}$$ are the values of magnetic fields at the centres of the circle and square respectively, then the ratio $${{{B_A}} \over {{B_B}}}$$ is:
A
$${{{\pi ^2}} \over {16}}$$
B
$${{{\pi ^2}} \over {8\sqrt 2 }}$$
C
$${{{\pi ^2}} \over {8}}$$
D
$${{{\pi ^2}} \over {16\sqrt 2 }}$$
3
JEE Main 2016 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
A galvanometer having a coil resistance of $$100\,\Omega $$ gives a full scale deflection, when a currect of $$1$$ $$mA$$ is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of $$10$$ $$A,$$ is :
A
$$0.1\,\Omega $$
B
$$3\,\Omega $$
C
$$0.01\,\Omega $$
D
$$2\,\Omega $$
4
JEE Main 2016 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
The temperature dependence of resistance of $$Cu$$ and undoped $$Si$$ in the temperature range $$300-400$$ $$K,$$ is best described by :
A
Linear increases for $$Cu,$$ exponential decrease of $$Si.$$
B
Linear decrease for $$Cu,$$ linear decrease for $$Si$$
C
Linear increase for $$Cu,$$ linear increase for $$Si.$$
D
Linear increase for $$Cu,$$ exponential increase for $$Si$$
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