physics

What is the total energy stored by the capacitors?

A. 2.0 x 10^-4J B. 1.0 x 10^-4J C. 9.0 x 10^-2J D. 1.0 x 10^-2J Correct Answer: Option D…

6 years ago

What is the effective capacitance in the circuit?

A. 2μF B. 6μF C. 18μF D. 216μF Correct Answer: Option A A. 2μF Explanation 1/c=1/6+1/6+1/6 = 1+1+1/6=3/6=1/2 = 2μF

6 years ago

As the plates of a charged variable capacitor are moved closer together, the potential difference between them.

A. increased B. decrease C. remains the same D. is doubled Correct Answer: Option B B. decrease

6 years ago

Which of the following statements about sound is correct?

A. when sound travels from air to a denser medium, it is refracted away from the normal at the point…

6 years ago

Dispersion of white light by a glass prism occurs because?

A. white light consists of a mixture of seven different colour B. the refractive index of glass is different from…

6 years ago

A piece of cloth appears green in sunlight. When held in red light, it will appear?

A. green B. blue C. red D. black Correct Answer: Option D D. black

6 years ago

An object is placed 20cm from a lens. If an image is formed on a screen 260cm away from the lens, calculate the magnification of the image.

A. 28 B. 26 C. 24 D. 13 Correct Answer: Option D D. 13 Explanation M = v/u = 260/20…

6 years ago

Convex spherical mirrors are preferred to plane mirrors as driving mirrors because?

A. the image produce is upright and clearly visible B. it provides a wider field of view C. the image…

6 years ago