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This Test Contains Questions from Chapter 1 of Physics.
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A planet is at distance 93 million miles from the sun. It completes its revolution around the sun in 365 earth days. Another plant was detected which revolves around the same star in a period of 500 earth days. Calculate its distance from that star.
A long straight positively charged wire is moving along its length at speed of 20m/s. A linear charge density is 5 coulumb/meter. Suddenly an electron moving towards wire with velocity of 5m/s with angle between wire and electron velocity = 45°. Calculate the magnitude of magnetic force experienced by electron. The radial distance between electron and wire is 2 meter.
A small object of mass m=234g slides along a track with elevated ends and a central flat part as shown in figure. The length of fat part is 5.6 meters and curved portions are frictionless. In traversing flat pat object loses 688Mj Energy. Calculate the coefficient of friction in flat part. If object is released at point A , h=1.05m above flat part of track. Where does object finally come to rest?
A simple pendulum of bob mass m and the mass of string is non-negligible and Length=L and time period of that pendulum is T.
If you plot a graph between velocity and amplitude of mass spring oscillating system. It approximately looks like
A spherical drop of water having area of 1cm² was split up using nozzle into very small particles numbering around 10 thousand. Kinetic energy of water droplets is negligible. What amount of energy is required to break the drop into droplets? Surface tension of water =72dyne/cm.
A puck of mass 1 kg is moving in a circle of radius r=5meters on a level frictionless surface. A string is attached to the puck which holds in a circle. A string passes through frictionless hole and is attached on other end to an object of mass 2kg.
I was looking at the sunset through a pin hole. I observed it took sun 2 minutes and 5 seconds to set i.e Time between its bottom pt towards horizon to its top pt going below horizon. Calculate angular diameter or size of sun?
12) A fancy glass pillar is put in a truck vertically without any support. The coefficient of friction between base of pillar and floor of truck is 0.5. Mass of pillar is 200kg.What is the safe range acceleration in which pillar won’t slip. Mass of truck is 2500 kg.
A steady stream of water falls down from a pipe. Assume flow is incompressible how does the pressure vary with height?
A stream is flowing down the river with the velocity of 5m/s. A boat starts from one bank to another bank. Boat has maximum speed of 10m/s. with what angle with repect to river bank should the boat move so that it reaches other bank is covering minimum distance?
Two identical tuning forks are oscillating at 180Hz.
Calculate beat frequency as measured by a person standing in between them.
1) When tunning forks are moving to right at speed of 31.3m/s and person stationary.
2) When person moves to right with speed 31.3m/s and tunning fork stationary.
Suppose that tuning forks beat are loud enough to hear.
A cup of water is boiled at t kelvin by absorbing electromagnetic energy in an oven in a given amount of time. If temperature of oven is doubled Consider it has a huge capacity. How many cups of water can now be boiled in same time?
You heated water 15 liters till Bp in water so that you could take a bath after adding some cold water in its temperature of tap water is 3°C. You have figured out by previous experiment water at 38.5°C is most comfortable for you to take bath. So how many liters of tap water should you add to the 15 liters of boiling water so that it’s just as optimum temperature for bath? Assume density doesn’t vary much.
The mass and diameter of a planet called krypton are double that of earth. A pendulum has period of 5 sec on earth. What will be the time period of planet krypton?
A planet has radius of 2R and time period of T_earth. Mass of planet is 5 times that of earth. What is weight of 5 kg
If earth some how contracts to 3rd of its present radius the now time period of satellite in sky will be ____ times earlier period.