An electron revolves 6 × 1015 times/sec in circular loop. The current in the loop is
|
(a) 0.96 mA |
(b) 0.96 m A |
(c) 28.8 A |
(d) None of these |
(a) 0.96 mA
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Two resistors of resistance 
and 
having 
are connected in parallel. For equivalent resistance R, the correct statement is
|
(a) |
(b) |
(c) |
(d) |
A and B are two conductors carrying a current i in the same direction. x and y are two electron beams moving in the same direction
|
(a) There will be repulsion between A and B attraction between x and y |
|
(b) There will be attraction between A and B, repulsion between x and y |
|
(c) There will be repulsion between A and B and also x and y |
|
(d) There will be attraction between A and B and also x and y |
A capacitor of capacitance 5
is connected as shown in the figure. The internal resistance of the cell is 0.5 Ω. The amount of charge on the capacitor plate is
|
(a) 0 |
(b) 5 |
(c) 10 |
(d) 25 |
A coil of 100 turns carries a current of 5 mA and creates a magnetic flux of 10–5 weber. the inductance is
|
(a) 0.2 mH |
(b) 2.0 mH |
(c) 0.02 mH |
(d) None of these |
A moving conductor coil in a magnetic field produces an induced e.m.f. This is in accordance with
|
(a) Amperes law |
(b) Coulomb law |
(c) Lenz’s law |
(d) Faraday’s law |
