Question
Water cannot be used to extinguish fire caused by
electric current, because –Solution
Using water for putting out electric fires is risky, as the firemen can be electrocuted by the water jet. Water is a good conductor of electricity, and, the electric current flows through the water jet directly into the hands of the person who is holding the water- hose, resulting in immediate electrocution
Two bodies of masses 3 kg and 5 kg are connected by a string and placed on a smooth horizontal surface. A force of 40 N is applied on the 5 kg block. Wh...
The group velocity of matter waves associated with a moving particle is:
In a logic gate, the output is 1 only when at least one input is 1. This gate is:
A particle starts from rest and accelerates uniformly at 2 m/s² for 5 seconds, then moves with constant speed for 5 seconds and finally decelerates uni...
Which of the following is an example of longitudinal waves in a gas medium?
Which quantity has the same dimensional formula as impulse?
What happens to the electrostatic force between two charges when the distance between them decreases?
Specific resistance of a conductor increases with :
Calculate the work done in moving a charge of 2 C across two points having a potential difference of 12 V.
Going from fluorine to chlorine, to bromine and then to iodine, the electro negativity:
