Consider the following statements regarding the precautions to be taken inside the house during a thunderstorm.
I. No phone calls should be made using a wired phone.
II. Electrical appliances such as lights and fans should be switched off.
III. Bathing with running water should be avoided.
IV. The metal doors should be closed during a thunderstorm.
Among the given statements,
Aonly I is incorrect
Bonly II is correct
Cboth I and III are correct
Dboth II and IV are correct
The given picture shows a river flowing downstream towards the sea. Situated near the river is a factory which occasionally discharges waste water into the river and, a farm where pesticide is used. A water treatment plant which supplies water for home use is to be built. The water treatment plant treats water which is pumped into it from the river. Which position would be suitable for the treatment plant?
A small cardboard is kept between the wall and the
bulb in a room. At which position the shadow formed
A The cardboard is held close to the wall.
B The cardboard is held at mid position between them.
C The cardboard is held close to the bulb.
D Both a and c
The answer isCBut I think it should be A.I actually tried it and it was was the sharpest when held close to the wall.