Last seen: Sep 30, 2021
(b) anaerobic bacteria Explanation: In the absence of oxygen, anaerobic micro-organism decomposed the compound of cow- dung sherry to generate bio...
(c) biogas bums smoke and leaves no residue Explanation: Biogas has high calorific value and leave no residue, no smoke after burning and can be u...
(c) hilly terrains Explanation: Hydroelectric power plant are generally located in high hilly areas where dam can easily be built and large reserv...
(b) Chemical - mechanical energy energy - electrical energy Explanation: Chemical energy – heat energy, mechanical energy, electrical energy
(c) Availability of water Explanation: Water is required to produce steam. Thermal power plants are setup near the coal field and transmission of...
(a) non-renewable source of energy Explanation: Fossil fuels were formed over million of years ago and there are only limited reserve. So they are...
(d) All of these Explanation: These are the characterises of ideal source of energy.
(d) All of these Explanation: Energy can neither be created nor be destroyed but usable form is dissipated to surrounding in less usable farm whic...
Take a thin fuse wire made of tin or tin-alloy having low melting point. Place this fuse wire on the porcelain fuse grip and insert the grip into the ...
Short circuiting If the plastic insulation of the live wire and neutral wire gets torn, then the two wires touch each other. This touching of the l...
To avoid electric shocks, the metal body of an electrical device is ‘earthed’. A wire called ‘earth wire’ is used to connect the metal body of the ele...
Principle: In an electric generator, mechanical energy is used to rotate a conductor in a magnetic field to produce electricity. It is working on the ...
(i) A deflection is observed in the galvanometer due to the induced current because of the changing magnetic flux (increasing) through the turns of th...
A motor is a device that converts the electrical energy into mechanical energy. Principle An electric motor is based on the fact that when a curre...
The force on a current carrying conductor placed in a magnetic field is given by the Fleming’s left hand rule. F = B I L Where F is the force on t...
(i) The direction of a magnetic field produced around a current-carrying conductor can be obtained by using Maxwell’s right-hand thumb rule. It states...
(i) current flowing into a circular coil and 2s.png (ii) solenoid carrying current. 2s.png