BITSAT Physics: Questions 66 - 70 of 382

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Question number: 66

» Wave Optics » Wavefront

MCQ▾

Question

A wave frequency Equation has a velocity of Equation . The distance between two nearest points, if the wave is Equation out of phase, will be approximately –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

0.7m

d.

Equation

Question number: 67

» Gravitation » Gravitational Acceleration

MCQ▾

Question

At what height from the earth surface, the acceleration of gravity will be half the value of Equation at surface? Equation

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 68

» Current Electricity » Temperature Dependence of Resistance

MCQ▾

Question

If a wire of resistance Equation is covered with ice and a voltage of Equation is applied across the wire then rate of melting of ice will be –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

All of the above

Question number: 69

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

Equation electric heater operates on a Equation line, then the rate at which it develops heat in watts will be –

Choices

Choice (4) Response

a.

670

b.

810

c.

1210

d.

1310

Question number: 70

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

Question

A wave frequency Equation is send along a string towards a fixed end. When this wave travels back, after reflection, a node is formed at a distance of Equation from the fixed end of the string. The speeds of incident (and reflected) waves are –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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