PYQSide ExamsMy practice

Current Electricity · Question 32

NEET (UG) 2021MatchingMedium📈 Topic in 25% papers+4−1
1

Column - I gives certain physical terms associated with flow of current through a metallic conductor. Column-II gives some mathematical relations involving electrical quantities. Match column-I and column-II with appropriate relations.

  1. (A)-(R); (B)-(Q); (C)-(S); (D)-(P)
  2. (A)-(R); (B)-(S); (C)-(P); (D)-(Q)
  3. (A)-(R); (B)-(S); (C)-(Q); (D)-(P)
  4. (A)-(R); (B)-(P); (C)-(S); (D)-(Q)

Answer

(2) (A)-(R); (B)-(S); (C)-(P); (D)-(Q)

Solution

(A) Drift velocity: vd = eEm (R)

(B) Resistivity: E = J = EJ (S)

(C) Relaxation period: = mne2 = mne2 (P)

(D) Current density: J = IA = nevd (Q)

(A)-(R); (B)-(S); (C)-(P); (D)-(Q)

Answer: (2)

NEET (UG) 2021

Keep practising — Current Electricity

2

Three resistors having resistances r1, r2 and r3 are connected as shown in the given circuit. The ratio i3i1 of currents in terms of resistances used in the circuit is : [figure]

  1. r2r1+r3
  2. r1r2+r3
  3. r2r2+r3
  4. r1r1+r2
NEET (UG) 2021
3

A resistance wire connected in the left gap of a metre bridge balances a 10 resistance in the right gap at a point which divides the bridge wire in the ratio 3:2. If the length of the resistance wire is 1.5 m, then the length of 1 of the resistance wire is :

  1. 1.0 10-1 m
  2. 1.5 10-1 m
  3. 1.5 10-2 m
  4. 1.0 10-2 m
NEET (UG) 2020
4

The color code of a resistance is given below : [figure] The values of resistance and tolerance, respectively, are

  1. 47 k , 10%
  2. 4.7 k , 5%
  3. 470 , 5%
  4. 470 k , 5%
NEET (UG) 2020
5

A charged particle having drift velocity 7.5 10-4 m s-1 in an electric field of 3 10-10 V m-1 has a mobility in m2 V-1 s-1 of :

  1. 2.5 106
  2. 2.5 10-6
  3. 2.25 10-15
  4. 2.25 1015
NEET (UG) 2020
6

Which of the following graph represents the variation of resistivity ( ) with temperature (T) for copper?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2020
7

The solids which have the negative temperature coefficient of resistance are :

  1. insulators only
  2. semiconductors only
  3. insulators and semiconductors
  4. metals
NEET (UG) 2020
8

Six similar bulbs are connected as shown in the figure with a DC source of emf E, and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be : [figure]

  1. 4 : 9
  2. 9 : 4
  3. 1 : 2
  4. 2 : 1
NEET (UG) 2019
9

In the circuits shown below, the readings of voltmeters and the ammeters will be : [figure]

  1. V1 = V2 and i1 = i2
  2. V1 > V2 and i1 > i2
  3. V1 > V2 and i1 = i2
  4. V1 = V2 and i1 > i2
NEET (UG) 2019
10

Which of the following acts as a circuit protection device?

  1. inductor
  2. conductor
  3. switch
  4. fuse
NEET (UG) 2019
11

A set of n equal resistors, of value R each, are connected in series to a battery of emf E and internal resistance R. The current drawn is I. Now, the n resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10I. The value of n is

  1. 10
  2. 11
  3. 20
  4. 9
NEET 2018

All Current Electricity PYQs →

PDFDownload Current Electricity PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Physics chapters
Class 11Units and MeasurementsMotion in a Straight LineMotion in a PlaneLaws of MotionWork, Energy and PowerSystem of Particles and Rotational MotionGravitationMechanical Properties of SolidsMechanical Properties of FluidsThermal Properties of MatterThermodynamics (Physics)Kinetic TheoryOscillationsWaves
Class 12Electric Charges and FieldsElectrostatic Potential and CapacitanceCurrent ElectricityMoving Charges and MagnetismMagnetism and MatterElectromagnetic InductionAlternating CurrentElectromagnetic WavesRay Optics and Optical InstrumentsWave OpticsDual Nature of Radiation and MatterAtomsNucleiSemiconductor ElectronicsExperimental Skills (Physics)