- A$16,1$
- B$8,8$
- C$8,16$
- ✓$4,12$
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The S.I. unit of electric flux is
|
(a) Weber |
(b) Newton per coulomb |
|
(c) Volt × metre |
(d) Joule per coulomb |
Laser beams are used to measure long distance because
|
(a) They are monochromatic |
(b) They are highly polarised |
|
(c) They are coherent |
(d) They have high degree of parallelism |
In a working nuclear reactor, Cadmium rods, (control rods) are used to
|
(a) Speed up neutrons |
(b) Slow down neutrons |
|
(c) Absorb some neutrons |
(d) Absorb all neutrons |
In a transformer, the number of turns in primary coil and secondary coil are 5 and 4 respectively. If 240 V is applied on the primary coil, then the ratio of current in primary and secondary coil is
|
(a) 4 : 5 |
(b) 5 : 4 |
(c) 5 : 9 |
(d) 9 : 5 |
The internal resistance of a cell is the resistance of
|
(a) Electrodes of the cell |
(b) Vessel of the cell |
|
(c) Electrolyte used in the cell |
(d) Material used in the cell |