What is increased in step-down transformer
|
(a) Voltage |
(b) Current |
(c) Power |
(d) Current density |
What is increased in step-down transformer
|
(a) Voltage |
(b) Current |
(c) Power |
(d) Current density |
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A plane wavefront (λ = 6 falls on a slit 0.4 mm wide. A convex lens of focal length 0.8 m placed behind the slit focusses the light on a screen. What is the linear diameter of second maximum
|
(a) 6mm |
(b) 12 mm |
(c) 3 mm |
(d) 9 mm |
Wires 1 and 2 carrying currents
and
respectively are inclined at an angle θ to each other. What is the force on a small element dl of wire 2 at a distance of r from wire 1 (as shown in figure) due to the magnetic field of wire1

|
(a) |
(b) |
(c) |
(d) |
Which of the following statement is wrong
|
(a) Infrared photon has more energy than the photon of visible light |
|
(b) Photographic plates are sensitive to ultraviolet rays |
|
(c) Photographic plates can be made sensitive to infrared rays |
|
(d) Infrared rays are invisible but can cast shadows like visible light rays |
Some equipotential surfaces of the magnetic scalar potential are shown in the figure. Magnetic field at a point in the region is

|
(a) |
(b) 2 |
(c) 0.5 |
(d) None of these |