Physics
The resistance of an ammeter is 13 Ω and its scale is graduated fro a current upto 100 A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 A by this meter. The value of shunt resistance is
22
Aug
The resistance of an ammeter is 13 Ω and its scale is graduated fro a current upto 100 A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 A by this meter. The value of shunt resistance is A galvanometer has a coil of resistance 100 [...]
A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively
22
Aug
A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively August 22, 2020 Category: Chapter 22 - Current Electricity , NEET Last 32 Years Solved [...]
Consider the following two statements (A)Kirchhoff’s junction law follows from conservation of charge. (B)Kirchhoff’s loop law follows from conservation of energy Which of the following is correct ?
22
Aug
Consider the following two statements (A)Kirchhoff’s junction law follows from conservation of charge. (B)Kirchhoff’s loop law follows from conservation of energy Which of the following is correct ? Consider the following two statements (A)Kirchhoff's junction law follows from conservation of charge. (B)Kirchhoff's loop law follows from conservation of energy Which of the following is correct [...]
A galvanometer has a coil of resistance 100 Ohms and gives a full-scale deflection for 30 mA current. If it is to work as a voltmeter of 30 V range, the resistance required to be added will be
22
Aug
A galvanometer has a coil of resistance 100 Ohms and gives a full-scale deflection for 30 mA current. If it is to work as a voltmeter of 30 V range, the resistance required to be added will be A galvanometer has a coil of resistance 100 Ohms and gives a full-scale deflection for 30 mA [...]
A millivoltmeter of 25 mV range is to be converted into an ammeter of 25 A range. The value (in ohm) of necessary shunt will be
22
Aug
A millivoltmeter of 25 mV range is to be converted into an ammeter of 25 A range. The value (in ohm) of necessary shunt will be A millivoltmeter of 25 mV range is to be converted into an ammeter of 25 A range. The value (in ohm) of necessary shunt will be August 22, 2020 [...]
A wire of resistance 4 ohm is stretched to twice its original length . The resistance of stretched wire would be
22
Aug
A wire of resistance 4 ohm is stretched to twice its original length . The resistance of stretched wire would be A wire of resistance 4 ohm is stretched to twice its original length . The resistance of stretched wire would be August 22, 2020 Category: Chapter 22 - Current Electricity , NEET Last 32 [...]
In a ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G, the resistance of ammeter will be
22
Aug
In a ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G, the resistance of ammeter will be In a ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G the resistance of ammeter will be August 22, 2020 Category: Chapter 22 - Current Electricity [...]
A circuit contains an ammeter ,a battery of 30 V and a resistance of 40.8 ohm all connected series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be
22
Aug
A circuit contains an ammeter ,a battery of 30 V and a resistance of 40.8 ohm all connected series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be a battery of 30 V and a resistance of 40.8 ohm all connected [...]
Two metal wires of identical dimension are connected in series. If σ1 and σ2 are the conductivities of the metal wires respectively, the effective conductivity of the combination is
22
Aug
Two metal wires of identical dimension are connected in series. If σ1 and σ2 are the conductivities of the metal wires respectively, the effective conductivity of the combination is the effective conductivity of the combination is Two metal wires of identical dimension are connected in series. If σ1 and σ2 are the conductivities of the [...]
Across a metallic conductor of non-uniform cross-section a constant potential difference is applied. The quantity which remain constant along the conductor is
22
Aug
Across a metallic conductor of non-uniform cross-section a constant potential difference is applied. The quantity which remain constant along the conductor is Across a metallic conductor of non-uniform cross-section a constant potential difference is applied. The quantity which remain constant along the conductor is August 22, 2020 Category: Chapter 22 - Current Electricity , NEET [...]