physics

What is the angle of dip at the magnetic equator?

A. 45° B. 0° C. 90° D. 180° Correct Answer: Option B = 0° Explanation The angle of dip is…

4 years ago

Find the frequencies of the first three harmonics of a piano string of length 1.5m; if the velocity of the wave on the string is 120ms−¹?

A. 40Hz, 80Hz, 120Hz B. 80Hz, 160Hz, 240Hz C. 180Hz, 360Hz, 540Hz D. 369Hz, 180Hz, 90Hz Correct Answer: Option A…

4 years ago

The magnetic force on a charged particle moving with velocity v is?

A. proportional to both the magnitude of the charge and the velocity v B. independent of the magnitude of the…

4 years ago

A capacitor of 20 x 10−¹²F and an inductor are joined in series. The value of the inductance that will give the circuit a resonance frequency of 200kHz is?

A. I/16 H B. I/8 H C. I/64 H D. I/32 H Correct Answer: Option D Explanation Resonant, frequency in…

4 years ago

Energy losses through eddy currents are reduced by using?

A. low resistance wires B. insulated soft iron wires C. few turns of wires D. high resistance wires Correct Answer:…

4 years ago

A transistor function mainly as a?

A. switch and amplifier B. rectifier and an amplifier C. charge storer and an amplifier D. charge storer and a…

4 years ago

The force on a current-carrying conductor in a magnetic field is greatest when the?

A. conductor makes an angle of 60° with the field B. force is independent of the angles between the fields…

4 years ago

At resonance; the phase angle in an A.C. circuit is?

A. 90° B. 60° C. 0° D. 180° Correct Answer: Option C - 60° Explanation At resonance in an a.c.…

4 years ago

The process of energy production in the sun is?

A. nuclear fission B. nuclear fusion C. electron collision D. radioactive decay Correct Answer: Option B - nuclear fusion Explanation…

4 years ago