NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 485 - 490 of 2320

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Question number: 485

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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

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MCQ▾

Question

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

Choices

Choice (4)Response

a.

0 Ω

b.

∞ Ω

c.

200 Ω

d.

300 Ω

Question number: 487

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MCQ▾

Question

An electric lamp is marked 60 W, 230 V. The cost of a 1 kWh of energy is Rs. 1.25. The cost of using this lamp 8 hr a day for 30 days is (approximately)

Choices

Choice (4)Response

a.

Rs. 10

b.

Rs 18

c.

Rs 20

d.

Rs 16

Question number: 488

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MCQ▾

Question

A voltmeter can measure up to 25 volt and its resistance is 1000 Ω . The resistance required to add with voltmeter to measure up to 250 volt will be

Choices

Choice (4)Response

a.

900 Ω

b.

9000 Ω

c.

2500 Ω

d.

1000 Ω

Passage

In the circuit shown in the figure,

Question number: 489 (1 of 3 Based on Passage) Show Passage

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MCQ▾

Question

Rate of dissipation of electrical energy in external resistor is

Choices

Choice (4)Response

a.

20 W

b.

24 W

c.

14 W

d.

4W

Question number: 490 (2 of 3 Based on Passage) Show Passage

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MCQ▾

Question

Rate of dissipation of electrical energy in battery is

Choices

Choice (4)Response

a.

20W

b.

14 W

c.

4 W

d.

24 W

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