The curves (a), (b) (c) and (d) show the variation between the applied potential difference (V) and the photoelectric current (i), at two different intensities of light (I1 > I2). In which figure is the correct variation shown
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(a)
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(b)
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(c)
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(d)
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(b)
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A wire of resistance 10 W is bent to form a circle. P and Q are points on the circumference of the circle dividing it into a quadrant and are connected to a Battery of 3 V and internal resistance 1 W as shown in the figure. The currents in the two parts of the circle are
|
(a) |
(b) |
|
(c) |
(d) |
The first line in the Lyman series has wavelength l. The wavelength of the first line in Balmer series is
|
(a) |
(b) |
(c) |
(d) |
The heat developed in an electric wire of resistance R by a current I for a time t is
|
(a) |
(b) |
(c) |
(d) |
Two identical induction coils each of inductance L joined in series are placed very close to each other such that the winding direction of one is exactly opposite to that of the other, what is the net inductance
|
(a) L2 |
(b) 2L |
(c) L/2 |
(d) Zero |
Current i is carried in a wire of length L. If the wire is turned into a circular coil, the maximum magnitude of torque in a given magnetic field B will be
|
(a) |
(a) |
(c) |
(d) |
Hydrogen atom excites energy level from fundamental state to n = 3. Number of spectrum lines according to Bohr, is
|
(a) 4 |
(b) 3 |
(c) 1 |
(d) 2 |
