Potentiometer is the instrument working on the principle of:
Correct answer: B. Wheatstone bridge
- A. Kirchholf's 1st law
- B. Wheatstone bridge
- C. Combination of resistance
- D. Kirchholf's 2nd law
Explanation
Wheatstone Bridge: The Wheatstone bridge is a circuit arrangement consisting of four resistive elements connected in a diamond shape. It operates based on the principle of null detection, where the bridge is balanced by adjusting one of the resistances until the potential difference across the central point of the bridge is zero. The potentiometer uses the Wheatstone bridge principle to measure unknown voltages or to compare and calibrate resistances. In conclusion, the potentiometer is an instrument that works based on the principle of the Wheatstone bridge, which involves the balancing of resistances to measure unknown voltages or compare resistances accurately.
Last updated
About Steady Current
Steady current is the continuous flow of charge at a constant rate through a conductor. The topic covers current, charge, potential difference, resistance, Ohm's law, resistivity and electrical power, along with series and parallel circuits, while distinguishing conventional current direction from electron motion.
Practise Current Electricity
1,052 free Current Electricity MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
2.00 x 10^6 e passing through a conductor in 1 millisecond. Electric current through conductor is:
A 0.01A moving coil Galvanometer of 5 Ω resistance can be converted into a 0.2A ammeter by a resistance R with the Galvanometer when r is:
A 1000 W lamp operates at 220 V for 60 s.The electric current passing through the lamp will be
A 3 V battery is connected in series with ammeter and 2 ohm resistance after short circuiting. What will be the reading of ammeter?
a battery of 12 volts is connected to three resistors of 4 ohm, 5 ohm and 3 ohm joined together in parallel, the current through 3 ohm resistor would be?