- A$n=5$ to $n=3$
- B$n=6$ to $n=2$
- ✓$n=2$ to $n=0$
- D$n=0$ to $n=2$
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Two different metals are joined end to end. One end is kept at constant temperature and the other end is heated to a very high temperature. The graph depicting the thermo e.m.f. is
|
(a) |
(b) |
(c) |
(d) |
If a number of sine waves with modulation indices n1, n2, n3 ........ modulate a carrier wave, then total modulation index (n) of the wave is
|
(a) n1 + n2 .... + 2(n1 + n2.....) |
(b) |
|
(c) |
(d) None of these |
A thin circular wire carrying a current I has a magnetic moment M. The shape of the wire is changed to a square and it carries the same current. It will have a magnetic moment
|
(a) M |
(b) |
(c) |
(d) |
The neutral temperature of a thermocouple is 350℃ when the cold junction is at 0℃ When the cold junction is immersed in a bath of 30℃, the inversion temperature is
|
(a) 700℃ |
(b) 600℃ |
(c) 350℃ |
(d) 670℃ |
Lines which represent places of constant angle of dip are called
| (a) Isobaric lines | (b) Isogonic lines | (c) Isoclinic lines | (d) Isodynamic lines |