The expression for thermo e.m.f. in a thermocouple is given by the relation E = 40 θ - 
, where θ is the temperature difference of two junctions. For this, the neutral temperature will be
|
(a) 100℃ |
(b) 200℃ |
(c) 300℃ |
(d) 400℃ |
(d) 400℃
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What are the colours of the Sun observed most during sunrise/sunset and noon?
Two bulbs, one of 50 watt and another of 25 watt are connected in series to the mains. The ratio of the currents through them is
|
(a) 2 : 1 |
(b) 1 : 2 |
|
(c) 1 : 1 |
(d) Without voltage, cannot be calculated |
The effective resistance of two resistors in parallel is 
. If one of the resistors is disconnected the resistance becomes 4 W. The resistance of the other resistor is
|
(a) 4 W |
(b) 3 W |
(c) |
(d) |
What is immaterial for an electric fuse wire
|
(a) Specific resistance of the wire |
(b) Radius of the wire |
|
(c) Length of the wire |
(d) Current flowing through the wire |
Five equal resistances each of value R are connected in a form shown alongside. The equivalent resistance of the network
|
(a) Between the points B and D is R |
(b) Between the points B and D is |
|
(c) Between the points A and C is R |
(d) b, c |
When a slow neutron goes sufficiently close to a 
nucleus, then the process that takes place is
|
(a) Fission of |
(b) Fusion of neutron |
(c) Fusion of |
(d) First (a) then(b) |
