Two plane mirrors are at right angles to each other. A man stands between them and combs his hair with his right hand. In how many of the images will he be seen using his right hand
| (a) None | (b) 1 | (c) 2 | (d) 3 |
Two plane mirrors are at right angles to each other. A man stands between them and combs his hair with his right hand. In how many of the images will he be seen using his right hand
| (a) None | (b) 1 | (c) 2 | (d) 3 |
(b) 1
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Three capacitors are connected to D.C. source of 100 volts shown in the adjoining figure. If the charge accumulated on plates of
and
are
and
respectively, then

|
(a) |
(b) |
|
(c) |
(d) |
Three charges each of magnitude q are placed at the corners of an equilateral triangle, the electrostatic force on the charge placed at the center is (each side of triangle is L)
|
(a) Zero |
(b) |
(c) |
(d) |
A 25 W, 220 V bulb and a 100 W, 220 V bulb are connected in parallel across a 440 V line
|
(a) Only 100 watt bulb will fuse |
(b) Only 25 watt bulb will fuse |
|
(c) Both bulbs will fuse |
(d) None of the bulbs will fuse |
A wire carrying a current i is placed in a uniform magnetic field in the form of the curve y = asin 0 ≤ x ≤ 2L. The force acting on the wire is
|
(a) |
(b) iBL |
(c) 2iBL |
(d) Zero |

In Young's double slit interference experiment, the slit separation is made 3 fold. The fringe width becomes
|
(a) 1/3 times |
(b) 1/9 times |
(c) 3 times |
(d) 9 times |