Effective capacitance between A and B in the figure shown is (all capacitance are in mF)
|
(a) 21 mF |
(b) 23 mF |
(c) |
(d) |
Effective capacitance between A and B in the figure shown is (all capacitance are in mF)
|
(a) 21 mF |
(b) 23 mF |
(c) |
(d) |
(d)
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A coil of inductance 8.4 mH and resistance 6 W is connected to a 12 V battery. The current in the coil is 1.0 A at approximately the time
|
(a) 500 sec |
(b) 20 sec |
(c) 35 milli sec |
(d) 1 milli sec |
Consider a binary star system consisting of two stars of masses and
separated by a distance of 30 AU with a period of revolution equal to 30 years. If one of the two stars is 5 times farther from the centre of mass than the other. The masses of the two stars in terms of solar masses are
|
(a) 5, 15 |
(b) 25, 5 |
(c) 25, 10 |
(d) 7, 25 |
A 5.0 amp current is setup in an external circuit by a 6.0 volt storage battery for 6.0 minutes. The chemical energy of the battery is reduced by
|
(a) 1.08 × 104 J |
(b) 1.08 × 10-4 volt |
(c) 1.8 × 104 J |
(d) 1.8 × 104 volt |
The capacity of a parallel plate condenser is 10 μF, when the distance between its plates is 8 cm. If the distance between the plates is reduced to 4 cm, then the capacity of this parallel plate condenser will be
|
(a) 5 μF |
(b) 10 μF |
(c) 20 μF |
(d) 40 μF |
A particle of mass m and charge q moves with a constant velocity v along the positive x direction. It enters a region containing a uniform magnetic field B directed along the negative z direction, extending from x = a to x = b. The minimum value of v required so that the particle can just enter the region x > b is
|
(a) qb B/m |
(b) q(b – a) B/m |
(c) qaB/m |
(d) q(b + a)B/2m |