In a Young’s double slit experiment, the source illuminating the slits is changed from blue to violet. The width of the fringes
|
(a) Increases |
(b) Decreases |
(c) Becomes unequal |
(d) Remains constant |
(b) Decreases
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The equivalent resistance between the points P and Q in the network given here is equal to (given r = 
)
|
(a) |
(b) 1 W |
(c) |
(d) 2 W |
Choose the correct option:
If a glass prism is dipped in water, its dispersive power:
A circular coil of diameter 7cm has 24 turns of wire carrying current of 0.75A. The magnetic moment of the coil is
|
(a) 6.9 |
(b) 2.3 |
|
(c) |
(d) |
The charge on a hole is equal to the charge of
|
(a) Zero |
(b) Proton |
(c) Neutron |
(d) Electron |
In the circuit shown in figure, each capacitor has a capacity of 3μF. The equivalent capacity between A and B is
|
(a) |
(b) 3 |
(c) 6 |
(d) 5 |
The magnetic flux linked with a coil at any instant ‘t’ is given by f = 5t3 – 100t + 300, the e.m.f. induced in the coil at t = 2 second is
|
(a) – 40 V |
(b) 40 V |
(c) 140 V |
(d) 300 V |
