Forms of energy and energy conservation - class-IX
Description: forms of energy and energy conservation | |
Number of Questions: 60 | |
Created by: Ashok Pandey | |
Tags: physics mechanics the essence of change work and energy energy transformations and energy transfers work, energy and power energy and its forms |
Select the correct option given below:
How much work can be obtained from 100 calories of heat energy?
Which type of energy does the food we eat have.?
Energy associated with moving objects is called:
The form of energy stored in kerosene is:
Heat is a form of :
A solar cell converts solar energy into:
Hydro-electric power generates
A stretched spring possesses:
The energy required to raise a given volume of water from a well can be
A cricket ball of mass 300 g is bowled towards a batsman with a speed of $\displaystyle 180\quad km\quad { h }^{ -1 }$. The batsman hits the ball such that it bounces back with the same speed. If the force exerted by the bat on the ball is 3000 N, find the duration of the impact is ____ s.
The type of energy utilised by humans and animals to carry out their daily life activities is ________ .
The energy stored in a torch cell is :
The energy that helps in burning of wood is :
An electric heater converts electrical energy into
The energy present in petrol is :
The muscular energy required by our body is given to us by :
The energy stored in food is :
Energy stored in the molecules of matter is called :
A torch converts________ energy to______ energy.
Electric heater converts:
The energy released on burning coal, oil, wood or gas is:
A vibrating body possesses:
When two dry bodies are rubbed together, they get charged due to movement of free electrons from one body to the other body, so they possess:
The energy possessed by fast moving water is called:
A magnet can attract iron filings as it possesses:
The ionization energy of an electron present in the second Bohr's orbit of hydrogen is:
What is potential energy?
Potential energy is classified into which two energy?
Mechanical energy is the form of which two energies:
Which one of the following is NOT a form of energy?
Identify, which of the following energies can be positive only:
Identify, which of the following energies can be positive only
What kind of energy transformation takes place
A ball is dropped from $30\ m$ on hitting the ground if it loses $40$% of its energy, it rebounds to a height equal to
A small sphere is moving at a constant speed in a vertical circle. Below is a list of quantities that could be used to describe some aspect of the motion of the sphere.
$I$ -kinetic energy
$II$ -gravitational potential energy
$III$ - momentum
Which of these quantities will change as this sphere moves around the circle?
Energy required to break a bond of DNA is approximately
A system absorbs 600 J of energy and does work equivalent to 400 J of energy. The internal energy change is
On a microscopic scale, all forms of energy may be studied as
Raindrops fall on earth with certain kinetic energy on the earth. From where do they get this energy ?
Water stored in a dam primarily possesses
The form of energy that wood can be categorized into is:
An atom bomb converts __________ into heat and sound energy.
From the following statements find the one that is NOT correct:
A wound spring has:
The form of energy that water stored in a dam primarily has is :
Which of the following quantity is different from others ?
The flowing water of a river possesses ...... energy.
The form of energy stored in kerosene is :
When you climb a staircase, you spend______ energy and gain ____energy.
Which of the following may no be conserved for an isolated system
Muscular energy is form of chemical energy.
What energy does the person possess while climbing a hill?
A fish swimming in water possess mechanical energy.
Energy stored in the bonds of molecules is a form of:
A body $A$ is placed on a railway platform and an identical body $B$ in a moving train. Which of the following energies of $B$ are greater than those of $A$ as seen from the ground?
The moving striker of the carom board will possess------ energy
Geothermal energy is feasible in regions that
A charged parallel plate capacitor of distance ($d$) has ${U} _{0}$ energy. A slab of dielectric constant ($K$) and thickness ($d$) is then introduced between the plates of the capacitor. The new energy of the system is given by:
person trying to lose weight by burning fat lifts a mass of $10kg$ upto a height of $0.5\, m\, with\, in\, 1000$ times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up? Fat supplies $3.8 \times 10^7 J$ of energy per kg which is converted to mechanical energy with a $20 \%$ efficiency rate.
When water falls from a height, the energy changes from,