The capacitor of capacitance 4μF and 6 μF are connected in series. A potential difference of 500 volts applied to the outer plates of the two capacitor system. Then the charge on each capacitor is numerically
|
(a) 6000 C |
(b) 1200 C |
(c) 1200 μC |
(d) 6000 μC |
(c) 1200 μC
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The ratio of the kinetic energy to the total energy of an electron in a Bohr orbit is
|
(a) – 1 |
(b) 2 |
(c) 1 : 2 |
(d) None of these |
Magnetic field intensity at the centre of coil of 50 turns, radius 0.5 m and carrying a current of 2 A is
|
(a) 0.5 |
(b) 1.25 |
(c) 3 |
(d) 4 |
A LC circuit is in the state of resonance. If C = 0.1μF and L = 0.25 henry. Neglecting ohmic resistance of circuit what is the frequency of oscillations
|
(a) 1007 Hz |
(b) 100 Hz |
(c) 109 Hz |
(d) 500 Hz |
The momentum of the photon of wavelength 5000Å will be
|
(a) 1.3 |
(b) 1.3 |
|
(c) 4 |
(d) 4 |
Optical fibres are related with
|
(a) Communication |
(b) Light |
(c) Computer |
(d) None of these |
Charges 4Q, q and Q and placed along x-axis at positions x = 0, x = l/2 and x = l, respectively. Find the value of q so that force on charge Q is zero
|
(a) Q |
(b) Q / 2 |
(c) – Q / 2 |
(d) – Q |
The phenomena of total internal reflection is seen when angle of incidence is
|
(a) 90° |
(b) Greater than critical angle |
|
(c) Equal to critical angle |
(d) 0° |
