1
IIT-JEE 2011 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1

The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 $$\mathop A\limits^o $$. The wavelength of the second spectral line in the Balmer series of singly-ionized helium atom is

A
1215 $$\mathop A\limits^o $$
B
1640 $$\mathop A\limits^o $$
C
2430 $$\mathop A\limits^o $$
D
4687 $$\mathop A\limits^o $$
2
IIT-JEE 2011 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1

A meter bridge is set up as shown, to determine an unknown resistance X using a standard 10 $$\Omega$$ resistor. The galvanometer shows null point when tapping-key is at 52 cm mark. The end-corrections are 1 cm and 2 cm, respectively, for the ends A and B. The determined value of X is

IIT-JEE 2011 Paper 1 Offline Physics - Current Electricity Question 13 English

A
10.2 $$\Omega$$
B
10.6 $$\Omega$$
C
10.8 $$\Omega$$
D
11.1 $$\Omega$$
3
IIT-JEE 2011 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2

A metal rod of length L and mass m is pivoted at one end. A thin disk of mass M and radius R ( < L) is attached at its centre to the free end of the rod. Consider two ways the disc is attached : (case A). The disc is not free to rotate about its centre and (case B) the disc is free to rotate about its centre. The rod-disc system performs SHM in vertical plane after being released from the same displaced position. Which of the following statement(s) is(are) true?

IIT-JEE 2011 Paper 1 Offline Physics - Rotational Motion Question 17 English

A
Restoring torque in case A = Restoring torque in case B.
B
Restoring torque in case A < Restoring torque in case B.
C
Angular frequency for case A > Angular frequency for case B.
D
Angular frequency for case A < Angular frequency for case B.
4
IIT-JEE 2011 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2

A composite block is made of slabs A, B, C, D and E of different thermal conductivities (given in terms of a constant K) and sizes (given in terms of length, L) as shown in the figure. All slabs are of same width. Heat Q flows only from left to right through the blocks. Then, in steady-state

IIT-JEE 2011 Paper 1 Offline Physics - Properties of Matter Question 14 English

A
heat flow through A and E slabs are same.
B
heat flow through slab E is maximum.
C
temperature difference across slab E is smallest.
D
heat flow through C = heat flow through B + heat flow through D.
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