Physics questions
20027 published questions with worked solutions.
- Potential difference across terminals of a particular battery is measured in two way. First with potentiometer which indicates...
- The thermo e. m. f. of a thermocouple is 40 /K at room temperature. A galvanometer of resistance 50 is capable of detecting a...
- At room temperature, the thermo e. m. f of copper-constantan is 50 /^ . The smallest temperature difference that can be measured...
- The neutral temperature of a thermocouple is 350^ when the cold junction is 0^ . when the cold junction is immersed in a bath of...
- Kirchhoff's laws are used to calculate currents and potential differences in
- According to the Kirchhoff's laws in an electric circuit, the algebraic sum of current at any junction is
- According to Kirchhoff's law, the algebraic sum of the products of current and resistance as well as e. m. f.s in a closed loop is
- In a closed circuit, the vector sum of total e. m. f.s is equal to the sum of the
- What determines the conventional direction of the product of current and resistance while applying the Kirchhoff's laws?
- A 50 V battery is connected across a 10 resistor and a current of 4.5 A flow. The internal resistance of the battery is
- Kirchhoff's current law is the law of conservation of
- A metrebridge cannot be used to determine
- Which of the following instruments is generally used with a galvanometer to show null reading?
- In Kelvin's method of finding the resistance of a galvanometer, we
- Accuracy of a metrebridge is maximum when the null point is obtained at the midpoint of the bridge wire. This is because
- At which point will the null point be obtained on a metrebidge if the ratio of the resistances in the two gaps is 2:3?
- Two resistances are connected in the two gaps of a metrebridge. The balance point is 20 cm from the zero end. When a resistance...
- In a metrebridge, when R_1 and X are the resistances in left gap and right gap respectively, the null point is obtained at 40 cm...
- The resistances in left and right gap of a meterbridge are 20 , and 30 , respectively. When the resistance in the left gap is...
- Resistances in the two gaps of a metrebridge are 10 ohm and 30 ohm respectively. If the resistances are interchanged, the balance...