Current Electricity (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 47 - 51 of 77

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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

Passage

A 6V battery of negligible internal resistance is connected across a uniform wire AB of length 100cm. The positive terminal of another battery of emf 4V and internal resistance 1Q is joined to the point A as shown in figure. Take the potential at D to be zero.

Circuit diagram consist of uniform wire AB, two batteries.

Circuit Diagram Consist of Uniform Wire AB, Two Batteries.

A 6V battery of negligible internal resistance is connected across a uniform wire AB of length 100cm. The positive terminal of another battery of emf 4V and internal resistance 1Q is joined to the point A as shown in figure.

Question number: 48 (1 of 2 Based on Passage) Show Passage

» Current Electricity » Potentiometer

MCQ▾

Question

What is the potential at points A and C?

Choices

Choice (4) Response

a.

8V, 4V

b.

8V, 3V

c.

6V, 4V

d.

6V, 2V

Question number: 49 (2 of 2 Based on Passage) Show Passage

» Current Electricity » Potentiometer

MCQ▾

Question

If the points C and D are connected by a wire, what will be the current through it?

Choices

Choice (4) Response

a.

2A

b.

3A

c.

1A

d.

Zero

Question number: 50

» Current Electricity » Electric Cell and Its Internal Resistance

MCQ▾

Question

When a Leclanche cell is connected to a 10Ω resistance then a current of 0.25 ampere flows in the circuit. If the resistance is reduced to 4 Ω then current becomes 0.5ampere. The internal resistance of galvanometer will be

Choices

Choice (4) Response

a.

1.5 Ω

b.

2 Ω

c.

1 Ω

d.

0.5 Ω

Question number: 51

» Current Electricity » Electrical Resistance

MCQ▾

Question

In the fig. shown, Calculate the current through 3 ohm resistor. The emf of battery is 2 volt and its internal resistance is Equation ohm.

Circuit diagram of 3Ω, 6Ω, 2Ω, 4Ω, 8Ω resistors

Circuit Diagram of 3Ω, 6Ω, 2Ω, 4Ω, 8Ω Resistors

In above figure 6 different resistors connected between point A and B. And 2V battery connected with it.

Choices

Choice (4) Response

a.

0.44 am.

b.

0.33 amp

c.

1.22 amp

d.

0.88 amp

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