- Ain alternating current of direct current
- ✓alternating current into direct current
- Chigh voltage to low voltage or low voltage to high voltage
- Dchanging direct current into fixed direct current
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In a thermocouple, the temperature that does not depend on the temperature of the cold junction is called
|
(a) Neutral temperature |
(b) Temperature of inversion |
|
(c) Both the above |
(d) None of the above |
A person cannot see distinctly at the distance less than one metre. Calculate the power of the lens that he should use to read a book at a distance of 25 cm
|
(a) + 3.0 D |
(b) + 0.125 D |
(c) – 3.0 D |
(d) + 4.0 D |
In Cu-Fe couple, the flow of current at the temperature of inversion is
|
(a) From Fe to Cu through the hot junction |
|
(b) From Cu to Fe through the hot junction |
|
(c) Maximum |
|
(d) None of the above |
A device which converts electrical energy into mechanical energy is
|
(a) Dynamo |
(b) generator |
(c) Electric motor |
(d) Induction coil |
The current in the given circuit is
|
(a) 8.31 A |
(b) 6.82 A |
(c) 4.92 A |
(d) 2 A |
A potentiometer consists of a wire of length 4 m and resistance 10 W. It is connected to cell of emf 2 V. The potential difference per unit length of the wire will be
|
(a) 0.5 V/m |
(b) 10 V/m |
(c) 2 V/m |
(d) 5 V/m |