NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 523 - 528 of 2320

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Question number: 523

» Current Electricity » Potentiometer

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MCQ▾

Question

A Potentiometer wire of length 1 m is connected in series with 490 Ω resistance and 2V battery. If 0.2mV/cm is the potential gradient, then resistance of the potentiometer wire is

Choices

Choice (4)Response

a.

5.9 Ω

b.

7.9 Ω

c.

6.9 Ω

d.

4.9 Ω

Question number: 524

» Current Electricity » Electrical Resistance

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MCQ▾

Question

The current in the given circuit will be

Circuit Diagram with equal 30Ω resistance

Circuit Diagram with Equal 30Ω Resistance

Here three equal resistor of 30 Ω connected with 2 V battery as shown in figure.

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 525

» Current Electricity » Electrical Resistance

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MCQ▾

Question

A cylindrical wire is stretched to increase its length by 10%. The percentage increase in the resistance of the wire will be

Choices

Choice (4)Response

a.

20%

b.

21%

c.

24%

d.

22%

Question number: 526

» Current Electricity » Kirchhoff's Laws

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MCQ▾

Question

The figure shows a network of currents. The magnitude of currents is shown here. The current/will be

Network of abcd of a circuit

Network of Abcd of a Circuit

Network abcd shown in figure. Directions of currents are also shown of each branch. Current I is unknown.

Choices

Choice (4)Response

a.

3 A

b.

9 A

c.

13 A

d.

19 A

Question number: 527

» Current Electricity » Kirchhoff's Laws

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MCQ▾

Question

Consider the circuit as shown in the figure. The value of current I, is

Circuit diagram consist of three battery and two resistor

Circuit Diagram Consist of Three Battery and Two Resistor

here three battery of 6V, 8V and 12V and two resistors are connected as shown figure.

Choices

Choice (4)Response

a.

b.

5 A

c.

-3 A

d.

3 A

Question number: 528

» Current Electricity » Electric Cell and Its Internal Resistance

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Assertion-Reason▾

Question

Assertion (Ꭺ)

In the circuit shown, , if

Circuit of battery and resistance.

Circuit of Battery and Resistance.

In figure 4V battery connected to 2Ω resistor between a and b.

Reason (Ꭱ)

Potential difference across terminals of a non-ideal battery is less than its emf when i current flow through it.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

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

c.

Ꭺ is false but Ꭱ is true

d.

Ꭺ is true but Ꭱ is false

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