In the interference pattern, energy is
|
(a) Created at the position of maxima |
(b) Destroyed at the position of minima |
|
(c) Conserved but is redistributed |
(d) None of the above |
(c) Conserved but is redistributed
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A uniform wire is bent in the form of a circle of radius R. A current I enters at A and leaves at C as shown in the figure :
If the length ABC is half of the length ADC, the magnetic field at the centre O will be
|
(a) Zero |
(b) |
(c) |
(d) |
10 wires (same length, same area, same material) are connected in parallel and each has 1 Ω resistance, then the equivalent resistance will be
|
(a) 10 Ω |
(b) 1 W |
(c) 0.1 W |
(d) 0.001 W |
In a primary coil 5A current is flowing on 220 volts. In the secondary coil 2200V voltage produces. Then ratio of number of turns in secondary coil and primary coil will be
|
(a) 1 : 10 |
(b) 10 : 1 |
(c) 1 : 1 |
(d) 11 : 1 |
A 3volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I, in the circuit will be
|
(a) 1/3 A |
(b) 1 A |
(c) 1.5 A |
(d) 2 A |
X-rays are known to be electromagnetic radiations. Therefore the X-ray photon has
| (a) Electric charge |
| (b) Magnetic moment |
| (c) Both electric charge and magnetic moment |
| (d) Neither electric charge nor magnetic moment |
