If eight identical drops are joined to form a bigger drop, the potential on bigger as compared to that on smaller drop will be
|
(a) Double |
(b) Four times |
(c) Eight times |
(d) One time |
(b) Four times
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Two capacitors of 1mF and 2mF are connected in series, the resultant capacitance will be
|
(a) 4μF |
(b) |
(c) |
(d) 3 μF |
For principal quantum number n = 3, the possible values of orbital quantum number ‘l’ are
|
(a) 1, 2, 3 |
(b) 0, 1, 2, 3 |
(c) 0, 1, 2 |
(d) –1, 0, +1 |
Which of the following is wrong statement
|
(a) An emf can be induced between the ends of a straight conductor by moving it through a uniform magnetic field |
|
(b) The self induced emf produced by changing current in a coil always tends to decrease the current |
|
(c) Inserting an iron core in a coil increases its coefficient of self induction |
|
(d) According to Lenz's law, the direction of the induced current is such that it opposes the flux change that causes it |
A conducting rod AC of length 4l is rotated about a point O in a uniform magnetic field 
directed into the paper. AO = l and OC = 3l. Then
|
(a) |
(b) |
(c) |
(d) |
In a hydrogen atom, the distance between the electron and proton is 2.5 
. The electrical force of attraction between them will be
|
(a) 2.8 |
(b) 3.7 |
(c) 6.2 |
(d) 9.1 |
A source emits light of wavelength 4700Å, 5400 Å and 6500 Å. The light passes through red glass before being tested by a spectrometer. Which wavelength is seen in the spectrum
|
(a) 6500 Å |
(b) 5400 Å |
(c) 4700 Å |
(d) All the above |
