NEET Physics - New - Current Electricity

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Question - 1

A carbon resistor of (47 ± 4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be :

  • A Yellow- Green - Violet- Gold
  • B Yellow- Violet - Orange - Silver
  • C Violet - Yellow- Orange - Silver
  • D Green - Orange - Violet - Gold

Question - 2

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 101. The value of 'n' is :

  • A 20
  • B 11
  • C 10
  • D 9

Question - 3

A battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which are connected in series. The terminals of the battery are short-circuited and the current I is measured. Which of the graphs shows the correct relationship between I and n?

  • A
  • B
  • C
  • D

Question - 4

Figure shows a circuit that contains three identical resistors with resistance R = 9.0 Ω each, two identical inductors with inductance L = 2.0 mH each, and an ideal battery with emf ε = 18 V. The current "i" through the battery just after the switch closed is :
  

  • A 0.2 A
  • B 2 A
  • C 0 ampere
  • D 2 mA

Question - 5

The potential difference (VA - VB) between the points A and B in the given figure is :
  

  • A -3 V
  • B +3 V
  • C +6 V
  • D +9 V

Question - 6

A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4m long. When the resistance, R, connected across the given cell, has values of (i) infinity (ii) 9.5 Ω, the 'balancing lengths', on the potentiometer wire are found to be 3 m and 2.85 m, respectively. The value of internal resistance of the cell is :

  • A 0.25 Ω
  • B 0.95 Ω
  • C 0.5 Ω
  • D 0.75 Ω

Question - 7

The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 Ω is:

  • A 1.0 Ω
  • B 0.2 Ω
  • C 0.5 Ω
  • D 0.8 Ω

Question - 8

The resistances of the four arms P, Q, R and S in a Wheatstone bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively. The e.m.f. and internal resistance of the cell are 7 volt and 5 ohm respectively. If the galvanometer resistance is 50 ohm, the current drawn from the cell will be :

  • A 2.0 A
  • B 1.0 A
  • C 0.2 A
  • D 0.1 A

Question - 9

In the circuit shown in the figure, if potential at point A is taken to be zero the potential at point B is:

  • A 1V
  • B +2V
  • C 2V
  • D +1V

Question - 10

In the circuit shown, the current through the 4 Ω resistor is 1 amp when the points P and M are connected to a d.c. voltage source. The potential difference between the points M and N is :
 

  • A 3.2 volt
  • B 1.5 volt
  • C 1.0 volt
  • D 0.5 volt
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