What principles are involved in the given devies , which are available in your home or a shop?
a) electrical fan b) battery c) motor pump d) solar pannels e) current generator f) induction stove g) electric heater h) dynamo

Some devices are given here a) Solenoid b) Bar magnet c) Motor d) generator (AC) e) Generator (DC) Which one converts electrical energy into mechanical energy?

Read the following text and answer the following questions on the basis of the same: Bottle Dynamo: A bottle dynamo is a small generator to generate electricity to power the bicycle light. Is is not a dynamo. Dynamo generates DC but a bottle dynamo generates AC. Newer models are now available with a rectifier. The available DC can power the light and small electronic gadgets. This is also known as sidewall generator since it operates using a roller placed on the sidewall of bicycle tyre. When the bicycle is in motion, the dynamo roller is engaged and electricity is generated as the tyre spins the roller. When engaged, a dynamo requires the bicycle rider to exert more effort to maintain a given speed than would otherwise be necessary when the dynamo is not present or disengaged. Bottle dynamos can be completely disengaged during day time when cycle light is not in use. In wet conditions, the roller on a bottle dynamo can slip against the surface of the tyre, which interrupts the electricity generated. This cause the lights to go out intermittently. Can you recharge the battery of your mobile phone with the help of bottle dynamo?

Some devices are given here a) Solenoid b) Bar magnet c) Motor d) generator (AC) e) Generator (DC) Which of the above forms a magnetic field when current is passed?

In the given figure . Which of the following are non collinear points ? L and E (b) F.L and G ( c ) I. E and H (d) F.L and E

State the energy changes in the following cases while in use: (a) loudspeaker (b) a steam engine (c ) microphone (d) washing machine (e) a glowing electric bulb (f) burning coal (g) a solar cell (h) bio-gas burner (i) an electric cell in a circuit (j) a petrol engine of a running car (k) an electric iron (l) a ceiling fan (m) an electromagnet

A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves (a) cells (b) potential gradients (c) a condition of no current flow through the galvanometer (d) a combination of cells, galvanometer and resistance

In the given circuit determine (a) Equivalent resistance (Including internal resistance ). (b) Current in each resistance ( c) Potential difference across each resistance (d) The rate awich the chemical energy of the cell is consumed ( e) The rate at which heat is generated inside the battery (f) Electric power output (h) Which resistance consumes maximum power (f) Power dissipated in 3 Omega resistance.

In the given circuit determine (a) Equivalent resistance (Including internal resistance ). (b) Current in each resistance ( c) Potential difference across each resistance (d) The rate awich the chemical energy of the cell is consumed ( e) The rate at which heat is generated inside the battery (f) Electric power output (h) Which resistance consumes maximum power (f) Power dissipated in 3 Omega resistance.

Given below are some properties. How many of these can hold good for phosphorous (a) Metal (b) Non- metal (c) Metalloid (d) Exhibits allotropy (e) Catenation property (f) Solid (g) Good conductor of electricity (h) Least dense among nitrogen family elements