The relation between voltage sensitivity (
) and current sensitivity (
) of a moving coil galvanometer is (Resistance of Galvanometer = G)
|
(a) |
(b) |
(c) |
(d) |
(a) 
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A galvanometer of 25 W resistance can read a maximum current of 6mA. It can be used as a voltmeter to measure a maximum of 6 V by connecting a resistance to the galvanometer. Identify the correct choice in the given answers
|
(a) 1025 W in series |
(b) 1025 W in parallel |
(c) 975 W in series |
(d) 975 W in parallel |
The unit of mutual conductance of a triode valve is
|
(a) Siemen |
(b) Ohm |
(c) Ohm metre |
(d) Joule Coulomb–1 |
The correct graph between the maximum energy of a photoelectron and the inverse of wavelength of the incident radiation is given by the curve
|
(a) A |
(b) B |
(c) C |
(d) None of the above |
3.8 days is the half-life period of a sample. After how many days, the sample will become 1/8th of the original substance
|
(a) 11.4 |
(b) 3.8 |
(c) 3 |
(d) None of these |
A radioactive sample of U238 decay to Pb through a process for which half life is 4.5 × 109 years. The ratio of number of nuclei of Pb to U238 after a time of 1.5 × 109 years (given 21/3 = 1.26)
|
(a) 0.12 |
(b) 0.26 |
(c) 1.2 |
(d) 0.37 |
Donor type impurity is found in
|
(a) Trivalent elements |
(b) Pentavalent elements |
|
(c) In both the above |
(d) None of these |
