- AMeasurement of voltage only
- BMeasurement of resistance
- CMeasurement of small currents
- DMeasurement of electric field
Explanation:
Moving Coil Galvanometer is an instrument used for the detection and measurement of current.
It is sensitive instrument and can measure current even if it is only a few microamperes.
It was invented by Johann Schweigger in the 1800s.
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The resultant capacitance between A and B in the following figure is equal to
|
(a) 1 μF |
(b) 3 μF |
(c) 2 μF |
(d) 1.5 μF |
What will be the angle of diffracting for the first minimum due to Fraunhoffer diffraction with sources of light of wave length 550 nm and slit of width 0.55 mm
|
(a) 0.001 rad |
(b) 0.01 rad |
(c) 1 rad |
(d) 0.1 rad |
Electric current is due to drift of electrons in
| (a) Metallic conductors | (b) Semi-conductors | (c) Both (a) and (b) | (d) None of these |
A convex lens of ______ focal length gives a greater magnification than lenses of _______ focal length.
When the electrical conductivity of a semi- conductor is due to the breaking of its covalent bonds, then the semiconductor is said to be
|
(a) Donar |
(b) Acceptor |
(c) Intrinsic |
(d) Extrinsic |
Crystal structure of NaCl is
|
(a) Fcc |
(b) Bcc |
(c) Both of the above |
(d) None of the above |
The unit for molar susceptibility is
|
(a) m3 |
(b) kg-m–3 |
(c) kg–1 m3 |
(d) No units |