Physics
The magnetic field lines produced by passing current in a long wire is shown alongside. Identify the correct condition for the intensity of the magnetic field to be maximum.
| Distance from the wire | The amount of current | |
|---|---|---|
| (a) | small | small |
| (b) | small | large |
| (c) | large | small |
| (d) | large | large |
- Option (a)
- Option (b)
- Option (c)
- Option (d)
Related Questions
Two blocks P and Q of different metals having their masses in the ratio 3 : 2 are given the same amount of heat. Their temperature rise by the same amount. The ratio of their specific heat capacities is :
- √3 : √2
- 9 : 4
- 2 : 3
- 3 : 2
The temperature of a substance on heating rises because :
- average potential energy of molecules increases
- average kinetic energy of molecules increases
- average kinetic energy of molecules decreases
- average potential energy of molecules remains the same
An endoscope uses optical fiber to transmit high resolution images of internal organs without loss of information. The phenomenon of light that governs the functioning of the optical fiber is:
- refraction
- reflection
- scattering
- total internal reflection