MCQ
Potentiometer measures potential more accurately because:
- AIt measures potential in open circuit.
- BIt uses sensitive galvanometer for null deflection.
- CIt uses high resistance potentiometer wire.
- DIt measures potential in closed circuit.
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Which of the following transition will have highest emission wavelength
|
(a) n = 2 to n = 1 |
(b) n = 1 to n = 2 |
(c) n = 2 to n= 5 |
(d) n = 5 to n = 2 |
A particle moving in a magnetic field increases its velocity, then its radius of the circle
|
(a) Decreases |
(b) Increases |
(c) Remains the same |
(d) Becomes half |
If 4 energy is required to move a charge of 0.25 coulomb between two points. Then what will be the potential difference between them
|
(a) 178 V |
(b) 256 V |
(c) 356 V |
(d) None of these |
Which of the following is coldest planet
|
(a) Mercury |
(b) Pluto |
(c) Earth |
(d) Venus |
