A galvanometer can be converted into an ammeter by connecting
|
(a) Low resistance in series |
(b) High resistance in parallel |
|
(c) Low resistance in parallel |
(d) High resistance in series |
(c) Low resistance in parallel
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$\alpha<\beta$
$\alpha<\beta \text{ if}\text{ A}<\text{B}$
$\alpha<\beta \text{ if}\text{ A}>\text{B}$
$\alpha<\beta \text{ if}\text{ A}=\text{B}$
The time taken by sunlight to cross a 5 mm thick glass plate (μ = 3/2) is
|
(a) 0.25 |
(b) 0.167 |
(c) 2.5 |
(d) 1.0 |
A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of combination is
|
(a) – 1.5 D |
(b) – 6.5 D |
(c) + 6.5 D |
(d) + 6.67 D |
What will be the angular width of central maxima in Fraunhoffer diffraction when light of wavelength 6000 
is used and slit width is 12
|
(a) 2 rad |
(b) 3 rad |
(c) 1 rad |
(d) 8 rad |
If a dielectric substance is introduced between the plates of a charged air-gap capacitor. The energy of the capacitor will
|
(a) Increase |
(b) Decrease |
|
(c) Remain unchanged |
(d) First decrease and then increase |
A transparent cube of 15 cm edge contains a small air bubble. Its apparent depth when viewed through one face is 6 cm and when viewed through the opposite face is 4 cm. Then the refractive index of the material of the cube is
|
(a) 2.0 |
(b) 2.5 |
(c) 1.6 |
(d) 1.5 |
