NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 483 - 486 of 2184

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Question number: 483

» Current Electricity » Potentiometer

Edit
Assertion-Reason▾

Question

Assertion (Ꭺ)

The emf of the driver cell in the potentiometer experiment should be greater than the emf of the cell to be determined.

Reason (Ꭱ)

The fall of potential across the potentiometer wire should not be less than the emf of the cell to be determined.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 484

» Current Electricity » Kirchhoff's Laws

Edit
MCQ▾

Question

Kirchhoff’s laws are based on conservation of

  1. Charge
  2. potential
  3. Energy
  4. Mass

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

Choices

Choice (4) Response

a.

1,2 and 3

b.

1 and 3

c.

2 and 4

d.

1 and 2

Question number: 485

» Current Electricity » Metre Bridge

Edit
MCQ▾

Question

In Meter Bridge or Wheatstone bridge for measurement of resistance, the known and the unknown resistances are interchanged. The error so removed is

Choices

Choice (4) Response

a.

Index error

b.

End correction

c.

Random error

d.

Due to temperature effect

Question number: 486

» Current Electricity » Series and Parallel Combinations of Resistors

Edit
MCQ▾

Question

The voltmeter shown in fig, reads 6V across the 60Ω resistors. Then the resistance of the voltmeter is-

diagram with 60Ω and 50Ω resistors, Voltmeter and battery.

Diagram with 60Ω and 50Ω Resistors, Voltmeter and Battery.

Here volt meter connected across the 60Ω resistor and battery and 50Ω resistor connected in series with it.

Choices

Choice (4) Response

a.

0 Ω

b.

∞ Ω

c.

200 Ω

d.

300 Ω