AIIMS Physics: Questions 485 - 489 of 500

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Question number: 485

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

The magnetic field at a distance 30cm from a 8cm long magnet, which has magnetic pole strength 14Am , is –

Choices

Choice (4) Response

a.

1.07×104T

b.

3.7×104T

c.

2.14×104T

d.

1.5×105T

Question number: 486

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

A galvanometer coil has a resistance of 990Ω and it shows full scale deflection for a current of 10mA . Calculate the value of resistance required to convert it into an ammeter of range 1A .

Choices

Choice (4) Response

a.

10Ω

b.

5Ω

c.

8Ω

d.

15Ω

Question number: 487

» Current Electricity » Electric Cell and Its Internal Resistance

MCQ▾

Question

A cell of emf E is first connected to 10Ω and then connected to resistance 40Ω . If heat produced in both cases is same then, what is internal resistance of cell?

Choices

Choice (4) Response

a.

30Ω

b.

40Ω

c.

5Ω

d.

20Ω

Question number: 488

» Properties of Solids & Liquids » Surface Energy and Surface Tension

Appeared in Year: 2006

MCQ▾

Question

Area of liquid film is 6×10cm2 and surface tension is T=20dynecm , what is the work done to change area up to 12×10cm2 : [RPMT]

Choices

Choice (4) Response

a.

120erg

b.

120joule

c.

1200joule

d.

1200erg

Question number: 489

» Current Electricity » Electric Cell and Its Internal Resistance

MCQ▾

Question

The emf of a primary cell is 5V , when it is shorted then it gives a current of 10A . Calculate internal resistance of primary cell.

Choices

Choice (4) Response

a.

1.5Ω

b.

2Ω

c.

0.5Ω

d.

1Ω

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