The (๐ – ๐) graph for a coil is
|
(a) |
(b) |
(c) |
(d) |
The (๐ – ๐) graph for a coil is
|
(a) |
(b) |
(c) |
(d) |
(a)
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The resistance of a galvanometer coil is R. What is the shunt resistance required to convert it into an ammeter of range 4 times
|
(a) |
(b) |
(c) |
(d) 4 R |
A convex lens forms a real image of an object for its two different positions on a screen. If height of the image in both the cases be 8 cm and 2 cm, then height of the object is
|
(a) 16 cm |
(b) 8 cm |
(c) 4 cm |
(d) 2 cm |
Same current i = 2A is flowing in a wire frame as shown in figure. The frame is a combination of two equilateral triangles ACD and CDE of side 1m. It is placed in uniform magnetic field B = 4T acting perpendicular to the plane of frame. The magnitude of magnetic force acting on the frame is
|
(a) 24 N |
(b) Zero |
(c) 16 N |
(d) 8 N |
A 25 watt, 220 volt bulb and a 100 watt, 220 volt bulb are connected in parallel across a 220 volt line. Which bulb will glow more brightly
|
(a) 25 watt bulb |
(b) 100 watt bulb |
|
(c) Both will have same brightness |
(d) First 25 watt then 100 watt |
A person's near point is 50 cm and his far point is 3 m. Power of the lenses he requires for
(i) reading and (ii) for seeing distant stars are
|
(a) – 2 D and 0.33 D |
(b) 2 D and – 0.33 D |
(c) – 2 D and 3 D |
(d) 2 D and – 3 D |