Sensitivity of Potentiometer Can Be Increased by

Sensitivity of Potentiometer Can Be Increased by

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1. NEET Questions
2. Physics
3. Current Electricity

The sensitivity of a potentiometer tin can be increased by

one.  increasing the potential gradient

two.  decreasing the length of potentiometer wire

3.  decreasing the current in the potentiometer wire

4.  all of these

• (i)

• (2)

• (3)

• (4)

Subtopic:   Meter Bridge & Potentiometer |

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NEET 2022 - Target Batch - Aryan Raj Singh

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Three copper wires take their lengths in the ratio 5:3:ane and their masses are in the ratio 1:3:5. Their electric resistance will exist in the ratio of :

1. 5:3:1

2. i:3:5

3. 125:xv:1

4. 1:15:125

• (1)

• (two)

• (3)

• (4)

Subtopic:   Derivation of Ohm'south Police |

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Current I as shown in the excursion will be

ane.  x A

2.$\frac{20}{3}\mathrm{A}$

three.$\frac{\mathrm{two}}{3}\mathrm{A}$

4.$\frac{5}{\mathrm{iii}}\mathrm{A}$

• (one)

• (2)

• (3)

• (four)

Subtopic:   Combination of Resistors |

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The current in a wire varies with time co-ordinate to the relation i= (three+2t)A. The amount of charge passing a cross section of the wire in the time interval t=0 to t=4.0 sec would be (where t is fourth dimension in seconds)

1.  28 C

two.  30.5 C

3.  8 C

4.  82 C

• (1)

• (two)

• (three)

• (iv)

Subtopic:   Current & Current Density |

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If I be the current limit of a fuse wire of length l and radius r, and then select the appropriate relation

(one)$I\alpha l$

(2)$I\alpha r^{\mathrm{ii}}$

(3)$I\alpha l^0$

(iv)$I\alpha r^0$

• (one)

• (2)

• (3)

• (four)

Subtopic:   Heating Effects of Current |

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The drift velocity of the electrons in a electric current-carrying  metallic usher is of the social club of

1.${\mathrm{ten}}^4\mathrm{yard}/\mathrm{south}$

two.${10}^8\mathrm{thousand}/\mathrm{s}$

3.${10}^0\mathrm{m}/\mathrm{s}$

4.${10}^{-\mathrm{four}}\mathrm{m}/\mathrm{s}$

• (1)

• (2)

• (3)

• (iv)

Subtopic:   Current & Electric current Density |

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Which of the following graphs correctly represents the variation of mobility$\left(\mathrm{\mu }\right)$ of electrons with applied electric field (E) in a metallic conductor?

one.

2.

3.

iv.

• (1)

• (ii)

• (3)

• (4)

Subtopic:   Current & Current Density |

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If a resistance whorl is made by joining in parallel ii resistances each of 20$\Omega$. An emf of 2V is applied across this curl for 100 seconds. The rut produced in the coil is

(1) xx J

(ii) 10 J

(3) twoscore J

(4) 80 J

• (one)

• (ii)

• (3)

• (4)

Subtopic:   Heating Effects of Current |

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$$\begin{gathered} \mathrm{A}\mathrm{battery}\mathrm{of}\mathrm{emf}\mathrm{of}4\mathrm{Five}\mathrm{gives}\mathrm{a}\mathrm{current}\mathrm{of}0.\mathrm{ii}\mathrm{A}\mathrm{when}\mathrm{continued}\mathrm{across}\mathrm{a}\mathrm{wire}\mathrm{of}\mathrm{resistance}\mathrm{xviii}\mathrm{\Omega }. \\ T\mathrm{he}\mathrm{internal}\mathrm{resistance}ofth\mathrm{due\; east}batt\mathrm{due\; east}ryis \end{gathered}$$

ane.$1\mathrm{\Omega }$

2.$\mathrm{two}\mathrm{\Omega }$

iii.$4\mathrm{\Omega }$

iv.$20\mathrm{\Omega }$

• (1)

• (ii)

• (iii)

• (four)

Subtopic:   emf & Terminal Voltage |

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When the length and surface area of cross-department both are doubled, then its resistance :

(ane) Will get half

(2) Will be doubled

(3) Volition remain the same

(iv) Will become iv times

• (1)

• (2)

• (3)

• (iv)

Subtopic:   Derivation of Ohm's Law |

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Sensitivity of Potentiometer Can Be Increased by

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