- A49:4
- ✓4:49
- C3:7
- DNone of these
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An e.m.f. of 12 volt is produced in a coil when the current in it changes at the rate of 45 amp/minute. The inductance of the coil is
|
(a) 0.25 henry |
(b) 1.5 henry |
(c) 9.6 henry |
(d) 16.0 henry |
Two capacitors of 3pF and 6pF are connected in series and a potential difference of 5000 V is applied across the combination. They are then disconnected and reconnected in parallel. The potential between the plates is
|
(a) 2250 V |
(b) 2222 V |
(c) 2.25 |
(d) 1.1 |
When current flows through a conductor, then the order of drift velocity of electrons will be
|
(a) |
(b) |
(c) |
(d) |
If the ratio of intensities of two waves is 1 : 25, then the ratio of their amplitudes will be
|
(a) 1 : 25 |
(b) 5 : 1 |
(c) 26 : 24 |
(d) 1 : 5 |