- APositive.
- BNegative.
- CZero.
- DAll of the above.
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In the circuit shown, A and V are ideal ammeter and voltmeter respectively. Reading of the voltmeter will be
|
(a) 2 V |
(b) 1 V |
(c) 0.5 V |
(d) Zero |
We have a galvanometer of resistance 25 Ω. It is shunted by a 2.5 Ω wire. The part of total current that flows through the galvanometer is given as
|
(a) |
(b) |
(c) |
(d) |
In an interference experiment, third bright fringe is obtained at a point on the screen with a light of 700 nm. What should be the wavelength of the light source in order to obtain 5th bright fringe at the same point
|
(a) 500 nm |
(b) 630 nm |
(c) 750 nm |
(d) 420 nm |
The radius of a metallic sphere if its capacitance is 1/9 F, is
|
(a) |
(b) |
(c) |
(d) |
If a white light is used in Young’s double slit experiments then a very large number of coloured fringes can be seen
|
(a) With first order violet fringes being closer to the central white fringes |
|
(b) First order red fringes being closer to the central white fringes |
|
(c) With a central white fringe |
|
(d) With a central black fringe |
An object placed 10 cm in front of a lens has an image 20 cm behind the lens. What is the power of the lens (in dioptres)
|
(a) 1.5 |
(b) 3.0 |
(c) – 15.0 |
(d) + 15.0 |
If and
are the electric and magnetic field vectors of E.M. waves then the direction of propagation of E.M. wave is along the direction of
|
(a) |
(b) |
(c) |
(d) None of these |