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Physics

Physics
Magnetism at the centre of a bar magnet is

maximum
zero
minimum
minimum or maximum

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Physics
In superconductors, the energy gap is due to

Electron-photon intercation
Electron-phonon interaction
Electron-electron interaction
Phonon-phonon interaction

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Physics
Which type of radiation has the lowest penetrating ability?

Beta
All of these
Alpha
Gamma

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Physics
The unit of magnetic permeability is

Henry/meter
Henry
Weber/meter
Weber

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Physics
The final image in a simple microscope is

Real, diminished and inverted
Virtual, diminished and erect
Virtual, magnified and erect
Real, magnified and erect

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Physics
Working of safety fuses depends upon1. magnetic effect of the current2. chemical effect of the current3. magnitude of the current4. heating effect of the currentSelect the correct answer using the code given below.

4 only
1, 2 and 3 only
3 and 4 only
1, 2, 3 and 4

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