- A$0^{\circ}$
- ✓$90^{\circ}$
- C$180^{\circ}$
- D$45^{\circ}$
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An α particle and a proton travel with same velocity in a magnetic field perpendicular to the direction of their velocities, find the ratio of the radii of their circular path
|
(a) 4 : 1 |
(b) 1 : 4 |
(c) 2 : 1 |
(d) 1 : 2 |
The reciprocal of resistance is
|
(a) Conductance |
(b) Resistivity |
(c) Voltage |
(d) None of the above |
Two magnets, each of magnetic moment ‘M’ are placed so as to form a cross at right angles to each other. The magnetic moment of the system will be
|
(a) 2M |
(b) |
(c) 0.5 M |
(d) M |
What will be the angle of diffracting for the first minimum due to Fraunhoffer diffraction with sources of light of wave length 550 nm and slit of width 0.55 mm
|
(a) 0.001 rad |
(b) 0.01 rad |
(c) 1 rad |
(d) 0.1 rad |