Lenz’s law: In the figure, two solenoids are side by side. The switch S, initially open, is closed. The induced current through the resistor R is

Kirchhoff’s rules: For the circuit shown in the figure, all quantities are accurate to 2 significant figures. What is the value of the current I1?

Transformers: An ideal transformer consists of a 500-turn primary coil and a 2000-turn secondary coil. If the current in the secondary is 3.0 A, what is the current in the primary?

Thin lenses: An object is placed 100 cm in front of a diverging lens with a focal length of magnitude 25 cm. A converging lens having a focal length of magnitude 33.33 cm is placed 30 cm past the first lens. Where is the final image formed?

Lens-maker’s formula: A convex-concave thin lens is made with the radius of curvature of the convex surface being 25.0 cm and the concave surface 45.0 cm. If the glass used has index of refraction 1.500, what is the focal length of this lens?

Thin lenses: A 4.0-cm tall object is placed 60 cm away from a converging lens of focal length 30 cm. What are the nature and location of the image? The image is

Plane mirrors: How far are you from your image when you stand 0.750 m in front of a vertical plane mirror?

Thin lenses: An object 1.25 cm tall is placed 100 cm in front of a convex lens with a focal length of magnitude 50 cm. A concave lens with a focal length of magnitude 20 cm is placed 90 cm beyond the first lens. Where is the final image located?

Thin lenses: A thin converging lens is found to form an image of a distant building 24 cm from the lens. If an insect is now placed 16 cm from this lens, how far FROM THE INSECT will its image be formed?

Internal battery resistance: What is the maximum current that can be drawn from a 1.50-V battery with an internal resistance of 0.30 ohm?