1
JEE Main 2017 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
A magnetic needle of magnetic moment 6.7 $$\times$$ 10-2 A m2 and moment of inertia 7.5 $$\times$$ 10-6 kg m2 is performing simple harmonic oscillations in a magnetic field of 0.01 T. Time taken for 10 complete oscillations is:
A
8.76 s
B
6.65 s
C
8.89 s
D
6.98 s
2
JEE Main 2017 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
JEE Main 2017 (Offline) Physics - Current Electricity Question 282 English
In the given circuit, the current in each resistance is:
A
0 A
B
1 A
C
0.25 A
D
0.5 A
3
JEE Main 2017 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following statements is false?
A
Kirchhoff’s second law represents energy conservation.
B
Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.
C
In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.
D
A rheostat can be used as a potential divider.
4
JEE Main 2017 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
In the given circuit diagram when the current reaches steady state in the circuit, the charge on the capacitor of capacitance C will be:

JEE Main 2017 (Offline) Physics - Capacitor Question 124 English
A
$$CE{{{r_1}} \over {({r_1} + r)}}$$
B
CE
C
$$CE{{{r_1}} \over {({r_2} + r)}}$$
D
$$CE{{{r_2}} \over {(r + {r_2})}}$$
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