When cells are connected in parallel, then
|
(a) The current decreases |
(b) The current increases |
|
(c) The e.m.f. increases |
(d) The e.m.f. decreases |
(b) The current increases
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Five capacitors of 10 μF capacity each are connected to a d.c. potential of 100 volts as shown in the adjoining figure. The equivalent capacitance between the points A and B will be equal to
|
(a) 40 μF |
(b) 20 μF |
(c) 30 μF |
(d) 10 μF |
How should people wearing spectacles work with a microscope?
The bit rate for a signal, which has a sampling rate of 8 kHz and where 16 quantisation levels have been used is
|
(a) 32000 bits/sec |
(b) 16000 bits/sec |
(c) 64000 bits/sec |
(d) 72000 bits/sec |
A man suffering from myopia can read a book placed at 10 cm distance. For reading the book at a distance of 60 cm with relaxed vision, focal length of the lens required will be
|
(a) 45 cm |
(b) – 20 cm |
(c) – 12 cm |
(d) 30 cm |
The measurement of voltmeter in the following circuit is
|
(a) 2.4 V |
(b) 3.4 V |
(c) 4.0 V |
(d) 6.0 V |
The length of a wire of a potentiometer is 100 cm, and the emf of its standard cell is E volt. It is employed to measure the e.m.f of a battery whose internal resistance is 0.5 W. If the balance point is obtained at l = 30 cm from the positive end, the e.m.f. of the battery is (where i is the current in the potentiometer)
|
(a) |
(b) |
(c) |
(d) |
