MCQ
A moving coil galvanometer is based on the:
- AHeating effect of current
- BMagnetic effect of current
- CChemical effect of current
- DPeltier effect of current
Explanation:
Torque acts on the coil due to magnetic field when current flows in it.
Hence, it is based on magnetic effect of current.
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A current of 2 A flows in a system of conductors as shown. The potential difference ( will be
|
(a) +2V |
(b) +1V |
(c) -1V |
(d) -2V |
For the production of characteristic
X-ray, the electron transition is
|
(a) n = 2 to n = 1 |
(b) n = 3 to n = 2 |
(c) n = 3 to n = 1 |
(d) n = 4 to n = 1 |
A small coil of N turns has area A and a current I flows through it. The magnetic dipole moment of this coil will be
|
(a) NI/A |
(b) |
(c) |
(d) NIA |