1
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
A circular loop of radius $$0.3$$ $$cm$$ lies center of the small loop is on the axis of the bigger loop. The distance between their centers is $$15$$ $$cm.$$ If a current of $$2.0$$ $$A$$ flows through the smaller loop, than the flux linked with bigger loop is
A
$$9.1 \times {10^{ - 11}}\,$$ weber
B
$$6 \times {10^{ - 11}}\,$$ weber
C
$$3.3 \times {10^{ - 11}}\,$$ weber
D
$$6.6 \times {10^{ - 9}}\,$$ weber
2
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
A metallic rod of length $$'\ell '$$ is tied to a string of length $$2$$$$\ell $$ and made to rotate with angular speed $$w$$ on a horizontal table with one end of the string fixed. If there is a vertical magnetic field $$'B'$$ in the region, the $$e.m.f$$ induced across the ends of the rod is JEE Main 2013 (Offline) Physics - Alternating Current and Electromagnetic Induction Question 234 English
A
$${{2B\omega \ell } \over 2}$$
B
$${{3B\omega \ell } \over 2}$$
C
$${{4B\omega {\ell ^2}} \over 2}$$
D
$${{5B\omega {\ell ^2}} \over 2}$$
3
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
In an $$LCR$$ circuit as shown below both switches are open initially. Now switch $${S_1}$$ is closed, $${S_2}$$ kept open. ($$q$$ is charge on the capacitor and $$\tau $$ $$=RC$$ is Capacitance time constant). Which of the following statement is correct ? JEE Main 2013 (Offline) Physics - Alternating Current and Electromagnetic Induction Question 233 English
A
Work done by the battery is half of the energy dissipated in the resistor
B
$$t = \,\tau ,\,q = CV/2$$
C
At $$t = \,2\tau ,\,q = CV\left( {1 - {e^{ - 2}}} \right)$$
D
At $$t = \,2\tau ,\,q = CV\left( {1 - {e^{ - 1}}} \right)$$
4
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
The magnetic field in a travelling electromagnetic wave has a peak value of $$20$$ $$n$$$$T$$. The peak value of electric field strength is :
A
$$3V/m$$
B
$$6V/m$$
C
$$9V/m$$
D
$$12V/m$$
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