- AAttractive
- BRepulsive
- CBoth
- DNone
Explanation:
An attractive property is develop in the comb due to friction. The comb on rubbing over dry hairs is aid to be charged.
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In Young's experiment, one slit is covered with a blue filter and the other (slit) with a yellow filter. Then the interference pattern
|
(a) Will be blue |
(b) Will be yellow |
(c) Will be green |
(d) Will not be formed |
Source of Sun's energy is
|
(a) Burning of hydrogen |
(b) Fission reactions involving hydrogen |
|
(c) Fusion reactions involving hydrogen |
(d) Some other source |
An uncharged capacitor is connected to a battery. On charging the capacitor
|
(a) All the energy supplied is stored in the capacitor |
|
(b) Half the energy supplied is stored in the capacitor |
|
(c) The energy stored depends upon the capacity of the capacitor only |
|
(d) The energy stored depends upon the time for which the capacitor is charged |
A reaction between a proton and
that produces
must also liberate
|
(a) |
(b) |
(c) |
(d) |
When a ray of light emerges from a block of glass, the critical angle is
|
(a) Equal to the angle of reflection |
|
(b) The angle between the refracted ray and the normal |
|
(c) The angle of incidence for which the refracted ray travels along the glass-air boundary |
|
(d) The angle of incidence |
A conducting wire is moving towards right in a magnetic field B. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be

|
(a) In the plane of paper pointing towards right |
|
(b) In the plane of paper pointing towards left |
|
(c) Perpendicular to the plane of paper and down‑wards |
|
(d) Perpendicular to the plane of paper and upwards |