Question
A 120-meter-long train crosses a pole in 6 seconds. How
much time will it take to cross a 180-meter-long platform?Solution
Speed of the train = Length of the train / Time taken to cross the pole = 120/6 = 20 m/s. Total distance to be covered when crossing the platform = Length of train + Length of platform = 120 + 180 = 300 meters. Time taken = Distance / Speed = 300/20 = 15 seconds. Correct Option: b
A bulb of 100 W is used for 10 hours. Find the energy consumed in kWh. Â
Which physical quantity remains constant during uniform circular motion? Â
When a liquid is heated in a container, which of the following processes primarily causes the heat transfer within the liquid? Â
________ are the elements of group 18.
A dielectric is pulled out of a charged capacitor (battery disconnected). The potential difference:
What was invented by 'Zacharias Janssen'?
Which of the following statement is correct?
I. Value of ‘g’ is higher at poles than equator
II. Weight of an object at moon is 1...
Figure-out the case from the following in which the rope will break if an animal of mass 30 kg climbs on a rope, which can stand a maximum tension of 5...
Which of the following correctly ranks molecular speeds at a fixed temperature?
Calculate the work done in moving a charge of 2 C across two points having a potential difference of 12 V.
Relevant for Exams:
