Current Electricity (NEET Physics): Questions 44 - 47 of 75

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Question number: 44

» Current Electricity » Electrical Resistance

MCQ▾

Question

In the fig below the bulbs are identical, The bulbs, light most brightly are

Circuit diagram with A, B, C, D and F bulbs.

Circuit Diagram With a, B, C, D and F Bulbs.

five bulb connected with battery (E) in figure.

Select the correct answers and mark it according to the following codes:

1. A

2. B

3. F

4. D

5. C

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1, 2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct

Question number: 45

» Current Electricity » Potentiometer

MCQ▾

Question

The resistance of a 10 meter long potentiometer wire is 1 ohm/meter. A cell of emf 2.2 volts and a high resistance box are connected in series with this wire. The value of resistance taken from resistance box for getting potential gradient of 2.2 millivolt/meter will be

Choices

Choice (4) Response

a.

790 Ω

b.

990 Ω

c.

810 Ω

d.

1000 Ω

Question number: 46

» Current Electricity » Wheatstone Bridge

MCQ▾

Question

Five resistors are connected as shown in the diagram. The equivalent resistance between A and B is

Bridge circuit diagram

Bridge Circuit Diagram

A and B five resistors make a balance bridge circuit. Because of balance bridge there will be no current passing through CD arm.

Choices

Choice (4) Response

a.

12 Ω

b.

9 Ω

c.

6 Ω

d.

15 Ω

Question number: 47

» Current Electricity » Potential Difference and EMF of Cell

MCQ▾

Question

In the figure,

Circuit diagram with battery and resistor

Circuit Diagram With Battery and Resistor

In circuit battery E and resistor r is connected in series. X and Y are end point of circuit.

  1. Current may flow from X to Y
  2. Current may flow from Y to X
  3. Direction of current depends on E
  4. Direction of current depends on r

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1, 2 and 3

b.

2 and 4

c.

1 and 2

d.

1 and 3

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