NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 515 - 518 of 2320

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Question number: 515

» Current Electricity » Wheatstone Bridge

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MCQ▾

Question

In the figure, the equivalent resistance between A and B is-

Circuit diagram with eight equal resistors R

Circuit Diagram with Eight Equal Resistors R

In circuit eight equal resistors R are connected between A and B.

Choices

Choice (4)Response

a.

3R

b.

c.

d.

R

Question number: 516

» Current Electricity » Potentiometer

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MCQ▾

Question

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10 -7 ohm-meter and the current passing through it is 0.1 ampere; cross-section of the wire is 10 -6 m 2. The potential gradient along the potentiometer wire is

Choices

Choice (4)Response

a.

10 -2 V/m

b.

10 -6 V/m

c.

10 -8 V/m

d.

10 -4 V/m

Question number: 517

» Current Electricity » Potentiometer

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MCQ▾

Question

The arrangement as shown in figure is called as

Circuit diagram consist of potentiometer, battery and a key

Circuit Diagram Consist of Potentiometer, Battery and a Key

In above circuit a key, a battery and potentiometer is connected

Choices

Choice (4)Response

a.

Potential adder

b.

Potential subtracted

c.

Potential multiplier

d.

Potential divider

Question number: 518

» Current Electricity » Electrical Resistance

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MCQ▾

Question

How will reading in the ammeter Switch. A be affected if another identical bulb Q is connected in parallel to P as shown in the figure? The voltage in the mains is maintained at constant value

Circuit with bulbs P and Q, Ammeter and switch

Circuit with Bulbs P and Q, Ammeter and Switch

In circuit two bulbs P and Q are connected in parallel.

Choices

Choice (4)Response

a.

The reading will increase four fold.

b.

The reading will not be affected.

c.

The reading will be double of previous one.

d.

The reading will be reduced to one half.

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