NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 506 - 509 of 2184

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Question number: 506

» Current Electricity » Electrical Resistance

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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 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.

1.22 amp

b.

0.44 am.

c.

0.88 amp

d.

0.33 amp

Question number: 507

» Current Electricity » Wheatstone Bridge

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MCQ▾

Question

Which is correct statements?

(1) The Wheatstone bridge is most sensitive when all the four resistances are of the same order

(2) Kirchhoff’s first law (for currents meeting at a junction in an electric circuit) expresses the conservation of charge.

(3) The rheostat can be used as a potential divider.

(4) In a balanced Wheatstone bridge, interchanging the positions of galvanometer and cell affects the balance of the bridge.

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

Choices

Choice (4) Response

a.

1 and 3

b.

1,2 and 3

c.

1 and 2

d.

2 and 4

Question number: 508

» Current Electricity » Electrical Resistance

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MCQ▾

Question

The equivalent resistance of the following infinite network of resistance is

Network of equal resistance 2Ω

Network of Equal Resistance 2Ω

Figure shows the infinite network of equivalent resistance of 2Ω.

Choices

Choice (4) Response

a.

More than 4 Ω but less than 12 Ω

b.

4 Ω

c.

12 Ω

d.

Less than 4 Ω

Question number: 509

» Current Electricity » Wheatstone Bridge

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MCQ▾

Question

For the post office box arrangement to determine the value of unknown resistance the unknown resistance should be connected between

Block diagram of Post office box

Block Diagram of Post Office Box

Figure shows the block diagram of Post office box, dots are indicating the resistance. And dark dots represent patches where resistance being connected.

Choices

Choice (4) Response

a.

A and D

b.

C and D

c.

B and C

d.

B 1 and C 1