General Physics II

How is current induced in a fixed coil by moving a magnet near it?

• A. By reducing the speed of the magnet

• B. By reducing the poles of the magnet

• C. By exposing the coil to a static magnetic field

• D. By changing the magnetic field's strength over time

What happens when a magnet is moved near a fixed coil?

• A. The coil becomes smaller.

• B. The coil's resistance increases.

• C. The coil induces a current.

• D. The coil generates heat.

How is the direction of the induced current determined in electromagnetic induction experiments?

• A. By the strength of the magnetic field

• B. By the speed of the magnet or coil

• C. By the direction of the changing magnetic field

• D. By the resistance of the conductor

What are some key applications of electromagnetic induction mentioned in the summary?

• A. Cooking appliances

• B. Transportation systems

• C. Electric power generation, transformers, and electric motors

• D. Weather forecasting equipment

Which of the following is a consequence of the law of reflection?

• A. Diffraction of light waves.

• B. Refraction of light waves.

• C. Dispersion of light waves.

• D. Formation of images in mirrors.

Why is understanding electromagnetic induction crucial in electric motors, transformers, and wireless charging?

• A. Because it enables the design of faster computers

• B. Because it helps prevent corrosion in metals

• C. Because it allows for efficient energy conversion and transmission

• D. Because it improves the efficiency of air conditioning systems

What effect does increasing the speed of the magnet or coil have on the rate of current induction?

• A. It decreases the rate of induction.

• B. It has no effect.

• C. It increases the rate of induction.

• D. It reverses the induced current.

What is dispersion?

• A. The bending of light as it passes through different mediums

• B. The separation of light into its component colors

• C. The absorption of light by a medium

• D. The reflection of light off a surface

When light travels from a less optically dense medium to a more optically dense medium, how does it bend?

• A. Away from the normal line.

• B. Towards the normal line.

• C. Perpendicular to the normal line.

• D. It does not bend.

What happens to the image formed by a mirror when the object moves closer to the mirror's surface?

• A. The image becomes smaller.

• B. The image becomes larger.

• C. The image remains the same size.

• D. The image disappears.