A galvanometer with a full-scale deflection of 20 mA is Converted to read 8 K by connecting a 395 Ω resistor in series with it. Determine the internal resistance of the galvanometer

3 years ago

A. 2.5Ω B. 5.0Ω C. 8.0Ω D. 10.0Ω Correct Answer: Option B = 5.0Ω Explanation r = resistance of the…

A body of mass, M, moving with velocity, V, has a wavelength, X, associated with it. This phenomenon is called?

3 years ago

A. photoelectric effect B. heisenberg's uncertainty principle C. compton effect D. wave-particles paradox Correct Answer: Option A - photoelectric effect…

The magnetic material produced from the chemical combination of metal oxides and has a very high resistance to electric current is called?

3 years ago

A. ferrite substance B. paramagnetic substance C. ferromagnetic substance D. diamagnetic substance Correct Answer: Option A - ferrite substance Explanation…

Which of the following statements about a straight current-carrying wire placed in a uniform magnetic field is correct? The wire experiences?

3 years ago

A. maximum motor force if the current reverses its direction B. no motor force of it is parallel to the…

The period of a 10 kHz radio wave traveling at 108 ms−1 is?

3 years ago

A. 3.0 x 10−5s B. 1.0 x 10−4 s C. 1.0 x 104s D. 3.0 x 104s Correct Answer: Option…

Current is passed through two parallel conductors in the same direction. If the conductors are placed near each other, they will?

3 years ago

A. move in a circle B. repel each other C. remain stationary D. attract each other Correct Answer: Option D…

The power of the lens is +2.5D. What is the radius of the curvature?

3 years ago

A. 2.5 cm B. 25.0 cm C. 40.0 cm D. 80.0 cm Correct Answer: Option D = 80.0 cm Explanation…

The reason for having a large number of turns in the coil of a moving coil galvanometer is to?

3 years ago

A. make the deflection of the needle proportional to the current B. increase the sensitivity of the galvanometer C. decrease…

The periodic rise and fall in the intensity of sound produced when two notes of nearly equal frequencies are sounded together is called?

3 years ago

A. doppler effect B. beat C. interference D. resonance Correct Answer: Option B - beat Explanation Beat, in physics, the…

An object is placed at different distances u; from a converging lens of focal length; 15.0cm. For what value of u does the lens act as a microscope?

3 years ago

A. u = 15cm only B. u = 30cm only C. M < 15cm only D. u > 30cm only…

Show more Posts
Show previous Posts