CBSE Class 12 science: Electrical Appliances Videos | About potentiometer

•  How does the balancing length of a potentiometer change on increasing the resistance offered by the rheostat that is connected in series with the primary cell. *
• the instrument based on null deflection method is
• 1 kilo watt = ?
• WHY CURRENT  OF  220V  IS  HARMFUL  ?
• Why can we not use rubber to make electric wires?
• Why do we prefer a potentiometer of longer length for getting the accurate readings?
• What do you mean by sensitivity of potentiometer? How can we increase the sensitivity of potentiometer?
• A potentiometer wire is 5 m long and a potential difference of 6 V is maintained between its ends. Find the emf of a cell which balances against a length of 180 cm of the potentiometer wire.
• The potential gradient along the length of uniform wire is 20 Vm^-1. The length of wire is 1m. What is the potential difference across two points on the wire separated by distance 40 cm?
• State the uses of potentiometer

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