MCQ
The size of the nucleus is approximately :
- A$10^{-10}$ meters
- ✓$10^{-15}$ meters
- C$10^{-5}$ meter
- D$10^{-18}$ meters
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A transformer has 100 turns in the primary coil and carries 8 A current. If input power is one kilowatt, the number of turns required in the secondary coil to have 500V output will be
|
(a) 100 |
(b) 200 |
(c) 400 |
(d) 300 |
The momentum of a photon is 2
gm-cm/sec. Its energy is
|
(a) 0.61 |
(b) 2.0 |
(c) 6 |
(d) 6 |
Two free parallel wires carrying currents in opposite direction
| (a) Attract each other |
| (b) Repel each other |
| (c) Neither attract nor repel |
| (d) Get rotated to be perpendicular to each other |