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Physics Class 9 ICSE: Force, Gravitational Force, Electric Current, Mirrors

4 Questions

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Physics Class 9 ICSE: Force, Gravitational Force, Electric Current, Mirrors

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Questions and Answers

What is the formula for calculating the force exerted by a spring?

$F = k + x$

$F = \frac{k}{x}$

$F = kx$ (correct)

$F = \frac{x}{k}$

What happens to the gravitational force between two objects when the distance between them is doubled?

It doubles

It quadruples

It becomes half (correct)

It remains the same

What is the SI unit of electric current?

Volt

Coulomb

Ohm

Ampere (correct)

Which of the following statements about concave mirrors is true?

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Study Notes

Forces and Springs

The formula for calculating the force exerted by a spring is F = kx, where F is the force, k is the spring constant, and x is the displacement from the equilibrium position.

Gravitational Force

When the distance between two objects is doubled, the gravitational force between them is reduced to one-quarter of its original value.

Electric Current

The SI unit of electric current is the ampere (A).

Mirrors

A true statement about concave mirrors is: [awaiting specific statement]

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Description

Test your knowledge of physics concepts including spring force calculation, gravitational force, SI unit of electric current, and properties of concave mirrors in the ICSE class 9 curriculum.