Question Answers

Two particles, each of mass m and charge q, are attached to the two ends of a light rigid rod of length 2R. The rod is rotated at constant angular speed about a perpendicular axis passing through its centre. The ratio of the magnitudes of the magnetic moment of the system and its angular momentum [...]

A galvanometer has resistance of 75 ohm and experiences a full scale deflection for 0.5 mA current. What is the value of resistance to be connected to it in order to convert it into a voltmeter to read upto 1 volt potential difference ? An electron moving around the nucleus with an angular momentum l [...]

The radius of a circular loop is r . A current i is flowing in it. The equivalent magnetic moment will be The radius of a circular loop is r . A current i is flowing in it. The equivalent magnetic moment will be November 26, 2021 Category: Chapter 4 - Magnetic Effect of Current [...]

The deflection in moving coil Galvanometer is reduced to half when it is shunted with a 40 Ω coil. The resistance of the Galvanometer is The deflection in moving coil Galvanometer is reduced to half when it is shunted with a 40 Ω coil. The resistance of the Galvanometer is November 26, 2021 Category: Chapter [...]

A galvanometer of resistance 240Ω allows only 4% of the main current after connecting a shunt resistance. The value of the shunt resistance is A galvanometer of resistance 240Ω allows only 4% of the main current after connecting a shunt resistance. The value of the shunt resistance is November 26, 2021 Category: Chapter 4 - [...]

A galvanometer of resistance 50Ω gives a full scale deflection for a current 5×10^−4 A. The resistance that The resistance that should be connected in series with the galvanometer to read 3V is A galvanometer of resistance 50Ω gives a full scale deflection for a current 5×10^−4 A. The resistance that The resistance that should [...]

When the number of turns of the coil is doubled, the current sensitivity of a moving coil galvanometer is doubled whereas, the voltage sensitivity of the galvanometer the current sensitivity of a moving coil galvanometer is doubled whereas the voltage sensitivity of the galvanometer When the number of turns of the coil is doubled November [...]

A galvanometer of resistance G can measure 1A current. If a shunt S in used to convert it into an ammeter to measure 10A current ratio of (S)/(G) is A galvanometer of resistance G can measure 1A current. If a shunt S in used to convert it into an ammeter to measure 10A current ratio [...]

The shunt required to send 10 of the main current through a moving coil galvanometer of resistance 99Ω is The shunt required to send 10 of the main current through a moving coil galvanometer of resistance 99Ω is November 21, 2021 Category: Chapter 4 - Magnetic Effect of Current and Moving Charges , MTG NEET [...]

A galvanometer of resistance 50Ω is connected to a battery of 3V along with a resistance of 2950Ω in series shows full-scale deflection of 30 divisions. The additional series resistance required to reduce the deflection to 20 divisions is A magnetic field due to a long straight wire carrying a current I is proportional to. [...]