Ray Optics and Optical Instruments — Physics STD 12 Science — Question

The kinetic energy force on the particle continuously increases with time.

1. The resultant force on the particle must be parallel to the velocity at all instants.
2. The resultant force on the particle must be at an angle less than 90° all the time.
3. Its height above the ground level must continuously decrease.
4. The magnitude of its linear momentum is increasing continuously.

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be(a) 0.1 watt(b) 1 watt(c) 10 watt(d) 100 watt

The wavelength of which colour is minimum ?

In an electric circuit containing a battery, the charge (assumed positive) inside the battery:

1. Always goes from the positive terminal to the negative terminal.
2. May go from the positive terminal to the negative terminal.
3. Always goes from the negative terminal to the positive terminal
4. Does not move.

A current carrying long solenoid is placed on the ground with its axis vertical. A proton is falling along the axis of the solenoid with a velocity v. When the proton enters into the solenoid, it will(a) Be deflected from its path(b) Be accelerated along the same path(c) Be decelerated along the same path(d) Move along the same path with no change in velocity

A 60 watt bulb carries a current of 0.5 amp. The total charge passing through it in 1 hour is            (a) 3600 coulomb(b) 3000 coulomb(c) 2400 coulomb(d) 1800 coulomb

There will be no force between two wires carrying currents if currents are: