NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 505 - 507 of 2320

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Question number: 505

» Current Electricity » Electric Cell and Its Internal Resistance

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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.

0.5 Ω

b.

2 Ω

c.

1.5 Ω

d.

1 Ω

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

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

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