NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 285 - 289 of 2320

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Question number: 285

» Communication System » Need for Modulation

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MCQ▾

Question

The acceleration due to gravity at a place can be determined with the help of a simple pendulum. For this purpose effective length of the pendulum is considered. If ′ be the length of the string and ‘d’ the diameter of the bob then the effective length is equal to

Choices

Choice (4)Response

a.

b.

c.

l + d

d.

l-d

Passage

Capacitor C 3 in the circuit is variable capacitor (its capacitance can be varied). Graph is plotted between potential differences V, (across capacitor C 1) versus C 3, Electric potential V 1 approaches on asymptote of 10 volts as C 3 → ∞

Circuit Diagram - capacitors C2 and C3

Circuit Diagram - Capacitors C2 and C3

Graph of V1→C3 for potential difference

Graph of V1→C3 for Potential Difference

Question number: 286 (1 of 3 Based on Passage) Show Passage

» Electrostatics » Capacitors

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The ratio of energy stored in capacitor C 1 to that of total energy when C 3 → ∞ is

Choices

Choice (4)Response

a.

b.

Zero

c.

Data insufficient

d.

1

Question number: 287 (2 of 3 Based on Passage) Show Passage

» Electrostatics » Capacitors

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Question

The ratio of the capacitance C1/C2 will be

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 288 (3 of 3 Based on Passage) Show Passage

» Electrostatics » Capacitors

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Question

The value of C 3 for which potential difference across C 1 will become 8V, is

Choices

Choice (4)Response

a.

2.5 C 1

b.

1.5 C 1

c.

3.5 C 1

d.

4.5 C 1

Question number: 289

» Kinematics » Uniform and Non-Uniform Motion

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Question

An engine of mass 6 x 10 4 kg pulls a coach of mass 2 x 10 4 kg. Suppose that there is a resistance of 1 N per 100 kg acting on both coach and engine, and that the driving

Force of engine is 4800 N. The acceleration of the engine and tension in the coupling will respectively be

Choices

Choice (4)Response

a.

0.04 m/s 2, 20 N

b.

0.05 m/s 2, 1200 N

c.

400 m/s 2, 200 N

d.

0.09 m/s 2, 2000 N

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